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How active are we? Levels of routine physical activity in children and adults

Published online by Cambridge University Press:  05 March 2007

M. B. E. Livingstone*
Affiliation:
Northern Ireland Centre for Diet and Health, University of Ulster, Coleraine, Co., Londonderry, BT52 ISA, UK
P. J. Robson
Affiliation:
Northern Ireland Centre for Diet and Health, University of Ulster, Coleraine, Co., Londonderry, BT52 ISA, UK
J. M. W. Wallace
Affiliation:
Northern Ireland Centre for Diet and Health, University of Ulster, Coleraine, Co., Londonderry, BT52 ISA, UK
M. C. McKinley
Affiliation:
Northern Ireland Centre for Diet and Health, University of Ulster, Coleraine, Co., Londonderry, BT52 ISA, UK
*
*Corresponding author: Dr M. B. E. Livingstone, fax +44 28 7032 4965, mail, mbe.livingstone@ulster.ac.uk
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Abstract

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The accurate measurement of physical activity is fraught with problems in adults, but more especially in children because they have more complex and multi-dimensional activity patterns. In addition, the results of different studies are often difficult to interpret and compare, because of the diversity of methodological approaches, differences in data analysis and reporting, and the adoption of varying definitions of what constitutes an appropriate level of activity. Furthermore, inactivity is seldom quantified directly. Although there exists an extensive literature documenting the health benefits of regular physical activity in adults, activity-health relationships in children are not clear-cut. Current recommendations reinforce the concept of health-related activity, accumulating 30 min moderate-intensity exercise on at least 5 d/week (adults) and 1 h moderate-intensity exercise/d (children). Evidence suggests a high prevalence of inactivity in adults, but whether or not inactivity is increasing cannot be assessed currently. Similarly, no definite conclusions are justified about either the levels of physical activity of children, or whether these are sufficient to maintain and promote health. Data to support the belief that activity levels in childhood track into adulthood are weak. Inactivity is associated with an increased risk of weight gain and obesity, but causality remains to be established. In children there is strong evidence to demonstrate a dose-response relationship between the prevalence and incidence of obesity and time spent viewing television. Future research should focus on refining methodology for physical activity assessment to make it more sensitive to the different dimensions and contexts of activity in different age-groups.

Type
Meeting Report
Copyright
Copyright © The Nutrition Society 2003

References

Aaron, DJ, Dearwater, SR & Kriska, AM (1992) Are activity and/or fitness related to weight gain in adolescents? Data from the AIC Study. Medicine and Science in Sports and Exercise 24, S124.CrossRefGoogle Scholar
Ainsworth, BE (2000) Challenges in measuring physical activity in women. Exercise and Sport Sciences Reviews 28, 9396.Google ScholarPubMed
Albanes, D, Blair, A & Taylor, PR (1989) Physical activity and risk of cancer in the NHANES I population. American Journal of Public Health 79, 744750.CrossRefGoogle ScholarPubMed
Alpert, BS & Wilmore, JH (1994) Physical activity and blood pressure in adolescents. Pediatric Exercise Science 6, 361380.CrossRefGoogle Scholar
American College of Sports Medicine (1978) The recommended quantity and quality of exercise for developing and maintaining fitness in healthy adults. Medicine and Science in Sports and Exercise 10, viix.Google Scholar
American College of Sports Medicine (1990) The recommended quality and quantity of exercise for developing and maintaining fitness in healthy adults. Medicine and Science in Sports and Exercise 22, 265274.Google Scholar
Andersen, LB & Haraldsdottir, J (1993) Tracking of cardiovascular disease risk factors including maximal oxygen uptake and physical activity from late teenage to adulthood. An 8-year follow-up study. Journal of International Medicine 234, 309315.CrossRefGoogle ScholarPubMed
Andersen, LB, Henckel, P & Saltin, B (1989) Risk factors for cardiovascular disease in 16–19-year-old teenagers. Journal of International Medicine 225, 157163.CrossRefGoogle ScholarPubMed
Andersen, RE, Crespo, CJ, Bartlett, SJ, Cheskin, LJ & Pratt, M (1998) Relationship of physical activity and television watching with body weight and level of fatness among children. Journal of the American Medical Association 279, 938942.CrossRefGoogle ScholarPubMed
Armstrong, N (1998) Young people's physical activity patterns as assessed by heart rate monitoring. Journal of Sports Science 16, S9S16.CrossRefGoogle ScholarPubMed
Armstrong, N & Bray, S (1991) Physical activity patterns defined by continuous heart rate monitoring. Archives of Disease in Childhood 66, 245247.CrossRefGoogle ScholarPubMed
Armstrong, N & Simons-Morton, B (1994) Physical activity and blood lipids in adolescents. Pediatric Exercise Science 6, 381405.CrossRefGoogle Scholar
Armstrong, N & Van Mechelen, W (1998) Are young people fit and active? In Young and Active, pp. 6997 [Biddle, SJH, Sallis, JF and Cavill, NC, editors]. London: Health Education Authority.Google Scholar
Armstrong, N & Welsman, JR (1997) Young People and Physical Activity. Oxford: Oxford University Press.Google Scholar
Arroll, B & Beaglehole, R (1992) Does physical activity lower blood pressure? A critical review of the clinical trials. Journal of Clinical Epidemiology 45, 439447.CrossRefGoogle ScholarPubMed
Bailey, DA, Faulkner, RA & McKay, HA (1996) Growth, physical activity and bone mineral acquisition. Exercise and Sports Science Reviews 24, 233266.CrossRefGoogle ScholarPubMed
Bailey, DA & Martin, AD (1994) Physical activity and skeletal health in adolescents. Pediatric Exercise Science 6, 330347.CrossRefGoogle Scholar
Bailey, RC, Olson, J, Pepper, SL, Porszasz, J, Barstow, TJ & Cooper, DM (1995) The level and tempo of children's physical activities: an observational study. Medicine and Science in Sports and Exercise 27, 10331041.CrossRefGoogle ScholarPubMed
Baranowski, T, Bouchard, C, Bar-Or, O, Bricker, T, Heath, G, Kimm, SYS, Malina, R, Obarzanek, E, Pate, R, Strong, WB, Truman, B & Washington, R (1992) Assessment, prevalence, and cardiovascular benefits of physical activity and fitness in youth. Medicine and Science in Sports and Exercise 24, Suppl., S237S247.CrossRefGoogle ScholarPubMed
Baranowski, T, Hooks, P, Tsong, Y, Cieslik, C & Nader, PR (1987) Aerobic physical activity among third- to sixth-grade children. Journal of Developmental and Behavioral Pediatrics 8, 203206.CrossRefGoogle ScholarPubMed
Baranowski, T & Simons-Morton, BG (1991) Dietary and physical activity assessment in school-aged children: measurement issues. Journal of School Health 61, 195197.CrossRefGoogle ScholarPubMed
Barnard, RJ & Wen, SJ (1994) Exercise and diet in the prevention and control of the metabolic syndrome. Sports Medicine 18, 218228.CrossRefGoogle ScholarPubMed
Bar-Or, O (1994) Childhood and adolescent physical activity and fitness and adult risk profile. In Health and Fitness through Physical Education, 931942 [Pate, RR and Hohn, RC, editors]. Champaign, IL: Human Kinetics.Google Scholar
Bar-Or, O & Baranowski, T (1994) Physical activity, adiposity and obesity among adolescents. Pediatric Exercise Science 6, 348360.CrossRefGoogle Scholar
Berlin, JA & Colditz, GA (1990) A meta-analysis of physical activity in the prevention of coronary heart disease. American Journal of Epidemiology 132, 612627.CrossRefGoogle ScholarPubMed
Beunen, GP, Malina, RM, Renson, R, Simons, J, Ostyn, M & Lefevre, J (1992) Physical activity and growth, maturation and performance: A longitudinal study. Medicine and Science in Sports and Exercise 24, 576585.CrossRefGoogle ScholarPubMed
Biddle, SJH, Sallis, JF & Cavill, NA (editors) (1998) Young and Active? Young People and Health Enhancing Physical Activity: Evidence and Implications. London: Health Education Authority.Google Scholar
Blair, SN (1992) Are American children and youth fit? The need for better data. Research Quarterly for Exercise and Sport 63, 120123.CrossRefGoogle ScholarPubMed
Blair, SN Clark, DG, Cureton, KJ & Powell, KE (1989) Exercise and fitness in childhood: implications for a lifetime of health. In Perspectives in Exercise Science and Sports Medicine. pp. 401430 [Gisolfi, CV and Lamb, DR, editors]. New York: McGraw-Hill.Google Scholar
Blair, SN & Connelly, JC (1996) How much physical activity should we do? The case for moderate amounts and intensities of physical activity. Research Quarterly for Exercise and Sport 67, 193205.CrossRefGoogle ScholarPubMed
Blair, SN, Kohl, HW & Barlow, CE (1993) Physical activity, physical fitness, and all-cause mortality in women: do women need to be active? Journal of the American College of Nutrition 12, 368371.CrossRefGoogle ScholarPubMed
Blair, SN, Kohl, HW, Gordon, NF & Paffenbarger, RS (1992) How much physical activity is good for health?. Annual Review of Public Health 13, 99126.CrossRefGoogle ScholarPubMed
Boreham, CA, Twisk, J, Savage, MJ, Cran, GW & Strain, JJ (1997) Physical activity, sports participation, and risk factors in adolescents. Medicine and Science in Sports and Exercise 29, 788793.CrossRefGoogle ScholarPubMed
Borer, KT (1995) The effects of exercise on growth. Sports Medicine 20, 375397.CrossRefGoogle ScholarPubMed
Bouten, CVC, Verboeket-Van de Venne, WPHG, Westerterp, KR, Verduin, M & Janssen, JD (1996) Daily physical activity assessment: comparison between movement registration and doubly labeled water. Journal of Applied Physiology 81, 10191026.CrossRefGoogle ScholarPubMed
British Heart Foundation (2000) Couch Kids – The Growing Epidemic. London: British Heart Foundation.Google Scholar
Cale, L & Almond, L (1992 a) Children's activity levels: a review of studies conducted on British children. Physical Education Review 15, 111118.Google Scholar
Cale, L & Almond, L (1992 b) Physical activity levels of young children: a review of the evidence. Health Education Journal 51, 9499.CrossRefGoogle Scholar
Cale, L & Almond, L (1992 c) Physical activity levels of secondaryaged children: a review. Health Education Journal 51, 192197.CrossRefGoogle Scholar
Cale, L & Harris, J (1993) Exercise recommendations for children and young people. Physical Education Review 16, 89102.Google Scholar
Calfas, KJ & Taylor, C (1994) Effects of physical activity on psychological variables in adolescents. Pediatric Exercise Science 6, 406423.CrossRefGoogle Scholar
Canada Fitness Survey (1981) Canadian Youth and Physical Activity. Ottawa: Canada Fitness Survey.Google Scholar
Caspersen, CJ (1989) Physical activity epidemiology: concepts, methods, and applications to exercise science. Exercise and Sports Science Reviews 17, 423473.Google Scholar
Caspersen, CJ & Merritt, RK (1995) Physical activity trends among 26 states, 1986–1990. Medicine and Science in Sports and Exercise 27, 713720.CrossRefGoogle ScholarPubMed
Caspersen, CJ, Merritt, RK & Stephens, T (1994) International activity patterns: a methodological perspective. In Advances in Exercise Adherence, pp 73110 [Dishman, RK, editor]. Champaign, IL: Human Kinetics.Google Scholar
Caspersen, CJ, Nixon, PA & DuRant, RH (1998) Physical activity epidemiology applied to children and adolescents. Exercise and Sports Science Reviews 26, 341403.CrossRefGoogle ScholarPubMed
Caspersen, CJ, Pereira, MA & Curran, KM (2000) Changes in physical activity patterns in the United States, by sex and cross-sectional age. Medicine and Science in Sports and Exercise 32, 16011609.CrossRefGoogle ScholarPubMed
Caspersen, CJ, Powell, KE & Christenson, GM (1985) Physical activity, exercise, and physical fitness: definitions and distinctions for health-related research. Public Health Reports 100, 126131.Google ScholarPubMed
Cauley, JA, LaPorte, RE, Sandler, RB, Schramm, MM & Kriska, AM (1987) Comparison of methods to measure physical activity in postmenopausal women. American Journal of Clinical Nutrition 45, 1422.CrossRefGoogle ScholarPubMed
Centers for Disease Control (1995) Assessing Health Risks in America. The Behavioral Risk Factor Surveillance System (BRFSS) at a Glance. Atlanta, GA: Centers for Disease Control and Prevention.Google Scholar
Chilibeck, PD, Sale, DG & Webber, CE (1995) Exercise and bone mineral density. Sports Medicine 19, 103122.CrossRefGoogle ScholarPubMed
Ching, PLYH, Willett, WC, Rimm, EB, Colditz, GA, Gortmaker, SL & Stampfer, MJ (1996) Activity level and risk of overweight in male health professionals. American Journal of Public Health 86, 2530.CrossRefGoogle ScholarPubMed
Chinn, S & Rona, RJ (2001) Prevalence and trends in overweight and obesity in three cross sectional studies in British children 1974–94. British Medical Journal 322, 2426.CrossRefGoogle ScholarPubMed
Coakley, EH, Rimm, EB, Colditz, G, Kawachi, I & Willett, W (1998) Predictors of weight change in men: Results from The Health Professionals Follow-Up Study. International Journal of Obesity 22, 8996.CrossRefGoogle ScholarPubMed
Corbin, CB & Pangrazi, RP (1992) Are American children and youth fit?. Research Quarterly for Exercise and Sport 63, 96106.CrossRefGoogle ScholarPubMed
Crespo, CJ, Ainsworth, BE, Keteyian, SJ, Heath, GW & Smit, E (1999) Prevalence of physical inactivity and its relation to social class in US adults: results from the Third National Health and Nutrition Examination Survey, 1988–1994. Medicine and Science in Sports and Exercise 31, 18211827.CrossRefGoogle ScholarPubMed
Crespo, CJ, Keteyian, SJ, Heath, GW & Sempos, CT (1996) Leisure-time physical activity among US adults. Results from the Third National Health and Nutrition Examination Survey. Archives of Internal Medicine 156, 9398.CrossRefGoogle ScholarPubMed
Crespo, CJ, Smit, E, Troiano, RP, Bartlett, SJ, Macera, CA & Andersen, RE (2001) Television watching, energy intake, and obesity in US children: results from the third National Health and Nutrition Examination Survey, 1988–1994. Archives of Pediatric and Adolescent Medicine 155, 360365.CrossRefGoogle ScholarPubMed
Cummings, SR, Kelsey, JL, Nevitt, MC & O'Dowd, KJ (1985) Epidemiology of osteoporosis and osteoporotic fractures. Epidemiological Reviews 7, 178208.CrossRefGoogle ScholarPubMed
Danforth, JS, Allen, KD, Fitterling, JM, Danforth, JA, Farrar, D, Brown, M & Drabman, RS (1990) Exercise as a treatment for hypertension in low socioeconomic status black children. Journal of Consulting Clinical Psychology 58, 237239.CrossRefGoogle ScholarPubMed
Dannenberg, AL, Keller, JB, Wilson, PWF & Castelli, WP (1989) Leisure time physical activity in the Framingham offspring study. Description, seasonal variation, and risk factor correlates. American Journal of Epidemiology 129, 7688.CrossRefGoogle ScholarPubMed
Davies, PSW, Gregory, J & White, A (1995) Physical activity and body fatness in pre–school children. International Journal of Obesity 19, 610.Google ScholarPubMed
de Almeida, MDV, Graca, P, Afonso, C, D'Amicis, A, Lappalainen, R & Damkjaer, S (1999) Physical activity levels and body weight in a nationally representative sample in the European Union. Public Health Nutrition 2, 105113.CrossRefGoogle Scholar
DeBusk, RF, Stenestrand, U, Sheehan, M & Haskell, WL (1990) Training effects of long versus short bouts of exercise in healthy subjects. American Journal of Cardiology 65, 10101013.CrossRefGoogle ScholarPubMed
Department of Health and Social Services (1996) Strategy Statement on Physical Activity. London: Department of Health.Google Scholar
Dietz, WH (1996) The role of lifestyle in health: the epidemiology and consequences of inactivity. Proceedings of the Nutrition Society 55, 829840.CrossRefGoogle ScholarPubMed
Dietz, WH, Bandini, LG, Morelli, JA, Peers, KF & Ching, PLYH (1994) Effect of sedentary activities on resting metabolic rate. American Journal of Clinical Nutrition 59, 556559.CrossRefGoogle ScholarPubMed
Dietz, WH & Gortmaker, SL (1984) Factors within the physical environment associated with childhood obesity. American Journal of Clinical Nutrition 39, 619624.CrossRefGoogle ScholarPubMed
Dietz, WH & Gortmaker, SL (1985) Do we fatten our children at the TV set? Obesity and television viewing in children and adolescents. Pediatrics 75, 807812.CrossRefGoogle Scholar
DiPietro, L (1995) Physical activity, body weight, and adiposity: an epidemiologic perspective. Exercise and Sports Science Reviews 23, 275303.CrossRefGoogle ScholarPubMed
DiPietro, L, Kohl, HW III, Barlow, CE & Blair, SN (1998) Improvements in cardiovascular fitness attenuate age-related weight gain in healthy men and women: The Aerobics Center Longitudinal Study. International Journal of Obesity 22, 5562.CrossRefGoogle ScholarPubMed
DiPietro, L, Williamson, DF, Caspersen, CJ & Eaker, E (1993) The descriptive epidemiology of selected physical activities and body weight among adults trying to lose weight: the Behavioral Risk Factor Surveillance System Survey. International Journal of Obesity 17, 6976.Google ScholarPubMed
DuRant, RH, Baranowski, T, Johnson, M & Thompson, WO (1994) The relationship among television watching, physical activity, and body composition of young children. Pediatrics 94, 449455.CrossRefGoogle ScholarPubMed
Ebisu, T (1985) Splitting the distance of endurance running: on cardiovascular endurance and blood lipids. Japanese Journal of Physical Education 30, 3743.Google Scholar
Ekeland, U, Sjöström, M, Yngve, A & Nilsson, A (2000) Total daily energy expenditure and pattern of physical activity measured by minute-by-minute heart rate monitoring in 14–15 year old Swedish adolescents. European Journal of Clinical Nutrition 54, 195202.CrossRefGoogle Scholar
Ekelund, U, Sjöström, M, Yngve, A, Poortvliet, E, Nilsson, A, Froberg, K, Wedderkopp, N & Westerterp, K (2001) Physical activity assessed by activity monitor and doubly labeled water in children. Medicine and Science in Sports and Exercise 33, 275281.CrossRefGoogle ScholarPubMed
Engstom, L-M (1986) The process of socialisation into keep-fit activities. Scandinavian Journal of Sports Science 8, 8997.Google Scholar
Epstein, LH, Paluch, RA, Gordy, CC & Dorn, J (2000) Decreasing sedentary behaviors in treating pediatric obesity. Archives of Pediatric and Adolescent Medicine 154, 220226.CrossRefGoogle ScholarPubMed
Epstein, LH, Valoski, AM, Vara, LS, McCurley, J, Wisniewski, L, Kalarchian, MA, Klein, KR & Shrager, LR (1995) Effects of decreasing sedentary behavior and increasing activity on weight change in obese children. Health Psychology 14, 109115.CrossRefGoogle ScholarPubMed
Escobedo, LG, Marcus, SE, Holtzman, D & Giovino, GA (1993) Sports participation, age at smoking initiation, and risk of smoking among US high school students. Journal of the American Medical Association 269, 13911395.CrossRefGoogle ScholarPubMed
Eston, RG, Rowlands, AV & Ingledew, DK (1998) Validity of heart rate, pedometry, and accelerometry for predicting the energy cost of children's activities. Journal of Applied Physiology 84, 362371.CrossRefGoogle ScholarPubMed
Fentem, P & Walker, A (1995) Setting targets for England: Challenging, measurable and achievable. In Moving On: International Perspectives on Promoting Physical Activity pp. 5876 [Killoran, AJ, Fentem, P and Caspersen, C, editors]. London: Health Education Authority.Google Scholar
Fogelholm, M, Mannisto, S, Vartiainen, E & Pietinen, P (1996) Determinants of energy balance and overweight in Finland 1982 and 1992. International Journal of Obesity 20, 10971104.Google ScholarPubMed
Folsom, AR, Caspersen, CJ, Taylor, HL, Jacobs, DR, Luepker, RV, Gomez-Marin, O & Gillum, RF (1985) Leisure time physical activity and its relationship to coronary risk factors in a population-based sample. The Minnesota Heart Survey. American Journal of Epidemiology 121, 570579.CrossRefGoogle Scholar
Food and Agriculture Organization/World Health Organization/United Nations University (1985) Energy and Protein Requirements. WHO Technical Report Series no. 724 Geneva: WHO.Google Scholar
Frandin, K, Mellstrom, D, Sundh, V & Grimby, G (1995) A lifespan perspective on patterns of physical activity and functional performance at the age of 76. Gerontology 41, 109120.CrossRefGoogle ScholarPubMed
French, SA, Jeffery, RW, Forster, JL, McGovern, PG, Kelder, SH & Baxter, JE (1994) Predictors of weight change over two years among a population of working adults: the Healthy Worker Project. International Journal of Obesity 18, 145154.Google ScholarPubMed
Gilbey, H & Gilbey, M (1995) The physical activity of Singapore primary school children as estimated by heart rate monitoring. Pediatric Exercise Science 7, 2635.CrossRefGoogle Scholar
Gilliam, TB, Freedson, PS, Geenen, DL & Shahraray, B (1981) Physical activity patterns determined by heart rate monitoring in 6–7 year-old children. Medicine and Science in Sports and Exercise 13, 6567.CrossRefGoogle ScholarPubMed
Goran, MI, Hunter, G, Nagy, TR & Johnson, R (1997) Physical activity related energy expenditure and fat mass in young children. International Journal of Obesity 21, 171178.CrossRefGoogle ScholarPubMed
Gordon, J & Grant, G (1997) How We Feel. London: Jessica Kingsley Publishers.Google Scholar
Gortmaker, SL, Must, A, Sobol, AM, Peterson, K, Colditz, GA & Dietz, WH (1996) Television viewing as a cause of increasing obesity among children in the United States, 1986–1990. Archives of Paediatric and Adolescent Medicine 150, 356362.CrossRefGoogle ScholarPubMed
Gregory, J & Lowe, S (2000) National Diet and Nutrition Survey: Young People Aged 4 to 18 Years. London: The Stationery Office.Google Scholar
Gruber, JJ (1986) Physical activity and self-esteem development in children: a meta-analysis. In Effects of Physical Activity on Children, pp 330348 [Stull, G and Eckert, H, editors]. Champaign, IL: Human Kinetics.Google Scholar
Hagberg, JM, Goldring, D, Ehsani, AA, Heath, GW, Hernandez, A, Schechtman, K & Holloszy, JO (1983) Effect of exercise training on the blood pressure and hemodynamic features of hypertensive adolescents. American Journal of Cardiology 52, 763768.CrossRefGoogle ScholarPubMed
Hansen, HS, Froberg, K, Hyldebrandt, N & Nielsen, JR (1991) A controlled study of eight months of physical training and reduction of blood pressure in children: the Odense schoolchild study. British Medical Journal 303, 682685.CrossRefGoogle ScholarPubMed
Harter, S (1988) Developmental processes in the construction of the self. In Integrative Processes and Early Socialization: Early to Middle Childhood, pp 4578 [Yawkey, TD and Johnson, JE, editors]. Hillsdale, NJ: Erlbaum.Google Scholar
Haskell, WL (1994) Health consequences of physical activity: understanding and challenges regarding dose-response. Medicine and Science in Sports and Exercise 26, 649660.CrossRefGoogle ScholarPubMed
Health Education Authority (1999) Young People and Health: Health Behaviour in School-aged Children. A Report of the 1997 Findings. London Health Education Authority.Google Scholar
Health Promotion Agency for Northern Ireland (1994) The Northern Ireland Health and Activity Survey: Main Findings. Belfast: H. M. Stationery Office.Google Scholar
Heartbeat Wales (1986) Welsh Youth Health Survey 1986. Heartbeat Report. no. 5. Cardiff: Heartbeat Wales.Google Scholar
Helmrich, SP, Ragland, DR, Leung, RW & Paffenbarger, RS (1991) Physical activity and reduced occurrence of non-insulin-dependent diabetes mellitus. New England Journal of Medicine 325, 147152.CrossRefGoogle ScholarPubMed
Hernández, B, Gortmaker, SL, Colditz, GA, Peterson, KE, Laird, NM & Parra-Cabrera, S (1999) Association of obesity with physical activity, television programs and other forms of video viewing among children in Mexico city. International Journal of Obesity 23, 845854.CrossRefGoogle ScholarPubMed
Hopkins, WG, Wilson, NC & Russell, DG (1991) Validation of the physical activity instrument for the Life in New Zealand national survey. American Journal of Epidemiology 133, 7382.CrossRefGoogle ScholarPubMed
Ingram, DK (2000) Age-related decline in physical activity: generalization to nonhumans. Medicine and Science in Sports and Exercise 32, 16231629.CrossRefGoogle ScholarPubMed
Jacobs, DR, Ainsworth, BE, Hartman, TL & Leon, AS (1993) A simultaneous evaluation of 10 commonly used physical activity questionnaires. Medicine and Science in Sports and Exercise 25, 8191.CrossRefGoogle ScholarPubMed
Janz, KF (1994) Validation of the CSA accelerometer for assessing children's physical activity. Medicine and Science in Sports and Exercise 26, 369375.CrossRefGoogle ScholarPubMed
Jebb, SA & Moore, MS (1999) Contribution of a sedentary lifestyle and inactivity to the etiology of overweight and obesity: current evidence and research issues. Medicine and Science in Sports and Exercise 31, Suppl., S534S541.CrossRefGoogle Scholar
Jennings, G, Nelson, L, Nestel, P, Esler, M, Korner, P, Burton, D & Bazelmans, J (1986) The effects of changes in physical activity on major cardiovascular risk factors, hemodynamics, sympathetic function, and glucose utilization in man: a controlled study of four levels of activity. Circulation 73, 3040.CrossRefGoogle Scholar
Johnson, RK, Russ, J & Goran, MI (1998) Physical activity related energy expenditure in children by doubly labeled water as compared with the Caltrac accelerometer. International Journal of Obesity 22, 10461052.CrossRefGoogle ScholarPubMed
Jones, DA, Ainsworth, BE, Croft, JB, Macera, CA, Lloyd, EE & Yusuf, HR (1998) Moderate leisure-time physical activity. Who is meeting the public health recommendations? A national crosssectional study. Archives of Family Medicine 7, 285289.CrossRefGoogle Scholar
Kann, L, Kinchen, SA & Williams, BI (1998) Youth risk behaviour surveillance – United States, 1997. Morbidity and Mortality Weekly Report CDC Surveillance Summaries 47, 132.Google ScholarPubMed
Kemper, HCG, Nels, J, Verschuur, R & Storm-Van Essen, L (1990) Tracking of health and risk indicators of cardiovascular disease from teenager to adult: Amsterdam Growth and Health Study. Preventive Medicine 19, 642655.CrossRefGoogle ScholarPubMed
Kesaniemi, YA, Danforth, E, Jensen, MD, Kopelman, PG, Lefebvre, P & Reeder, BA (2001) Dose-response issues concerning physical activity and health: an evidence-based symposium. Medicine and Science in Sports and Exercise 33 Suppl. 6, S351S358.Google ScholarPubMed
King, AJC & Coles, B (1992) The Health of Canada's Youth: Views and Behaviours of 11–13, and 15-Year-olds from 11 Countries. Ottawa: Minister of National Health and Welfare.Google Scholar
Klesges, RC, Klesges, LM, Eck, LH & Shelton, ML (1995) A longitudinal analysis of accelerated weight gain in preschool children. Pediatrics 95, 126130.Google ScholarPubMed
Klesges, RC, Klesges, LM, Haddock, CK & Eck, LH (1992) A longitudinal analysis of the impact of dietary intake and physical activity on weight change in adults. American Journal of Clinical Nutrition 55, 818822.CrossRefGoogle ScholarPubMed
Lee, I, Paffenbarger, RS & Hseih, C (1991) Physical activity and risk of developing colorectal cancer among college alumni. Journal of the National Cancer Institute 83, 13241329.CrossRefGoogle ScholarPubMed
Leon, AS, Connett, J, Jacobs, DR & Rauramaa, R (1987) Leisure-time physical activity levels and risk of coronary heart disease and death. The Multiple Risk Factor Intervention Trial. Journal of the American Medical Association 258, 23882395.CrossRefGoogle ScholarPubMed
Lichtman, SW, Pisarska, K, Berman, ER, Pestone, M, Dowling, H, Offenbacher, E, Weisel, H, Heshka, S, Matthews, DE & Heymsfield, SB (1992) Discrepancy between self-reported and actual caloric intake and exercise in obese subjects. New England Journal of Medicine 327, 18931898.CrossRefGoogle ScholarPubMed
Lissner, L, Heitmann, BL & Bengtsson, C (1997) Low-fat diets may prevent weight gain in sedentary women: prospective observations from the population study of women in Gothenburg, Sweden. Obesity Research 5, 4348.CrossRefGoogle ScholarPubMed
Livingstone, B (2000) Epidemiology of childhood obesity in Europe. European Journal of Pediatrics 159 Suppl. 1, S14S34.CrossRefGoogle ScholarPubMed
Livingstone, MBE (1994) Energy expenditure and physical activity in relation to fitness in children. Proceedings of the Nutrition Society 53, 207221.CrossRefGoogle ScholarPubMed
Livingstone, MBE (1997) Heart-rate monitoring: the answer for assessing energy expenditure and physical activity in population studies? British Journal of Nutrition 78, 869871.CrossRefGoogle ScholarPubMed
Livingstone, MBE, Coward, WA, Prentice, AM, Davies, PSW, Strain, JJ, McKenna, PG, Mahoney, CA, White, JA, Stewart, CM & Kerr, M-JJ (1992) Daily energy expenditure in free-living children: comparison of heart rate monitoring with the doubly labeled water ( 2 H 2 18 O) method. American Journal of Clinical Nutrition 56, 343352.CrossRefGoogle Scholar
Livingstone, MBE, Prentice, AM, Coward, WA, Ceesay, SM, Strain, JJ, McKenna, PG, Nevin, GB, Barker, ME & Hickey, RJ (1990) Simultaneous measurement of free-living energy expenditure by the doubly-labeled water ( 2 H 2 18 O) method and heart-rate monitoring. American Journal of Clinical Nutrition 52, 5965.CrossRefGoogle Scholar
Livingstone, MBE, Robson, PJ, McCarthy, S, Kiely, M, Harrington, K, Browne, P, Galvin, M, Wareham, NJ & Rennie, KL (2001) Physical activity patterns in a nationally representative sample of adults in Ireland. Public Health Nutrition 4, 11071116.CrossRefGoogle Scholar
Lovelady, CA, Meredith, CN, McCrory, MA, Nommsen, LA, Joseph, LJ & Dewey, KG (1993) Energy expenditure in lactating women: a comparison of doubly labeled with heart-rate-monitoring methods. American Journal of Clinical Nutrition 57, 512518.CrossRefGoogle ScholarPubMed
Lytle, LA, Kelder, SH, Perry, CL & Klepp, K-I (1995) Covariance of adolescent health behaviors: the Class of 1989 Study. Health Education Research 10, 133146.CrossRefGoogle Scholar
MacConnie, SE, Gilliam, TB, Geenen, DL & Pels, AE (1982) Daily physical activity patterns in prepubertal children involved in a vigorous exercise program. International Journal of Sports Medicine 3, 202207.CrossRefGoogle Scholar
Macek, M, Bell, D, Rutenfranz, J, Vavra, J, Masopust, J, Neidhart, B & Schmidt, KH (1989) A comparison of coronary risk factors in groups of trained and untrained adolescents. European Journal of Applied Physiology 58, 577582.CrossRefGoogle ScholarPubMed
Macera, CA & Pratt, M (2000) Public health surveillance of physical activity. Research Quarterly for Exercise and Sport 71, S97S103.CrossRefGoogle ScholarPubMed
Maffeis, C, Talamini, G & Tatò, L (1998) Influence of diet, physical activity and parents' obesity on children's adiposity: a four-year longitudinal study. International Journal of Obesity 22, 758764.CrossRefGoogle ScholarPubMed
Malina, RM (1995) Physical activity and fitness of children and youth: questions and implications. Medicine, Exercise, Nutrition and Health 4, 123135.Google Scholar
Malina, RM (1996) Tracking of physical activity and physical fitness across the lifespan. Research Quarterly for Exercise and Sport 67, Suppl. 3, S48S57.CrossRefGoogle ScholarPubMed
Marti, B & Vartiainen, E (1989) Relation between leisure time exercise and cardiovascular risk factors among 15-year-olds in eastern Finland. Journal of Epidemiology and Community Health 43, 228233.CrossRefGoogle ScholarPubMed
Martínez, ME, Giovannucci, E, Spiegelman, D, Hunter, DJ, Willett, WC & Colditz, GA (1997) Leisure-time physical activity, body size, and colon cancer in women: Nurses' Health Study Research Group. Journal of the National Cancer Institute 89, 948955.CrossRefGoogle ScholarPubMed
Martínez-González, MA, Martínez, JA, Hu, FB, Gibney, MJ & Kearney, J (1999) Physical inactivity, sedentary lifestyle and obesity in the European Union. International Journal of Obesity 23, 11921201.CrossRefGoogle ScholarPubMed
Melanson, EL & Freedson, PS (1996) Physical activity assessment: a review of methods. Critical Reviews in Food Science and Nutrition 36, 385396.CrossRefGoogle ScholarPubMed
Mensink, GB, Deketh, M, Mul, MD, Schuit, AJ & Hoffmeister, H (1996) Physical activity and its association with cardiovascular risk factors and mortality. Epidemiology 7, 391397.CrossRefGoogle ScholarPubMed
Montoye, HJ, Kemper, HCG, Saris, WHM & Washburn, RA (1996) Measuring Physical Activity and Energy Expenditure. Champaign, IL: Human Kinetics.Google Scholar
Moore, LL, Nguyen, US, Rothman, KJ, Cupples, LA & Ellison, RC (1995) Preschool physical activity level and change in body fatness in young children. The Framingham Children's Study. American Journal of Epidemiology 142, 982988.CrossRefGoogle ScholarPubMed
Murgatroyd, PR, Shetty, PS & Prentice, AM (1993) Techniques for the measurement of human energy expenditure: a practical guide. International Journal of Obesity 17, 549568.Google ScholarPubMed
Murphy, MH & Hardman, AE (1998) Training effects of short and long bouts of brisk walking in sedentary women. Medicine and Science in Sports and Exercise 30, 152157.CrossRefGoogle Scholar
Must, A, Jacques, PF, Dallal, GE, Bajema, CJ & Dietz, WH (1992) Long-term morbidity and mortality of overweight adolescents. A follow-up of the Harvard Growth Study of 1992 to 1935. New England Journal of Medicine 327 ,13501355.CrossRefGoogle ScholarPubMed
Must, A & Strauss, RS (1999) Risks and consequences of childhood and adolescent obesity. International Journal of Obesity 23 Suppl. 2, S2S11.CrossRefGoogle ScholarPubMed
Nelson, L, Jennings, GL, Elser, MD & Kover, PI (1986) Effects of changing levels of physical activity on blood pressure and haemodynamics in essential hypertension. Lancet i, 473476.CrossRefGoogle Scholar
Paeratakul, S, Popkin, BM, Keyou, G, Adair, LS & Stevens, J (1998) Changes in diet and physical activity affect the body mass index of Chinese adults. International Journal of Obesity 22, 424431.CrossRefGoogle ScholarPubMed
Paffenbarger, RS, Hyde, RT, Wing, AL & Hsieh, CC (1986) Physical activity, all-cause mortality, and longevity of college alumni. New England Journal of Medicine 314, 605613.CrossRefGoogle ScholarPubMed
Paffenbarger, RS, Wing, AL, Hyde, RT & Jung, D (1983) Chronic disease in former college students. XX. Physical activity and incidence of hypertension of college alumni. American Journal of Epidemiology 117, 245257.CrossRefGoogle Scholar
Pate, RR (1993) Physical activity assessment in children and adolescents. Critical Reviews in Food Science and Nutrition 33, 321326.CrossRefGoogle ScholarPubMed
Pate, RR, Baranowski, T, Dowda, M & Trost, SG (1996) Tracking of physical activity in oung children. Medicine and Science in Sports and Exercise 28, 9296.CrossRefGoogle Scholar
Pate, RR, Long, BJ & Heath, G (1994) Descriptive epidemiology of physical activity in adolescents. Pediatric Exercise Science 6, 434447.CrossRefGoogle Scholar
Pate, RR, Pratt, M, Blair, SN, Haskell, WL, Macera, CA, Bouchard, C et al. (1995) Physical activity and public health: a recommendation from the Centers for Disease Control and Prevention and the American College of Sports Medicine. Journal of the American Medical Association 273, 402407.CrossRefGoogle Scholar
Pate, RR & Ross, JG (1987) The national children and youth fitness study II: factors associated with health-related fitness. Journal of Physical Education, Recreation and Dance 58, 9395.CrossRefGoogle Scholar
Philippaerts, RM, Westerterp, KR & Lefevre, J (1999) Doubly labelled water validation of three physical activity questionnaires. International Journal of Sports Medicine 20, 284289.CrossRefGoogle ScholarPubMed
Powell, KE, Thompson, PD, Caspersen, CJ & Kendrick, KS (1987) Physical activity and the incidence of coronary heart disease. Annual Review of Public Health 8, 253287.CrossRefGoogle ScholarPubMed
Prentice, AM, Black, AE, Coward, WA, Davies, HL, Goldberg, GR, Murgatroyd, PR, Ashford, J, Sawyer, M & Whitehead, RG (1986) High levels of energy expenditure in obese women. British Medical Journal 292, 983987.CrossRefGoogle ScholarPubMed
Prentice, AM & Jebb, SA (1995) Obesity in Britain: gluttony or sloth? British Medical Journal 311, 437439.CrossRefGoogle ScholarPubMed
Racette, SB, Schoeller, DA & Kushner, RF (1995) Comparison of heart rate and physical activity recall with doubly labeled water in obese women. Medicine and Science in Sports and Exercise 27, 126133.CrossRefGoogle ScholarPubMed
Raitakari, OT, Porkka, KVK, Taimela, S, Telema, R, Räsänen, L & Viikari, JSA (1994) Effects of persistent physical activity and inactivity on coronary risk factors in children and young adults. The Cardiovascular Risk in Young Finns Study. American Journal of Epidemiology 140, 195205.CrossRefGoogle Scholar
Reaven, PD, Barrett-Conner, E & Edelstein, S (1991) Relation between leisure-time physical activity and blood pressure in older women. Circulation 83, 559565.CrossRefGoogle ScholarPubMed
Remington, PL, Smith, MY, Williamson, DF, Anda, RF, Gentry, EM & Hogelin, GC (1988) Design, characteristics, and usefulness of state-based behavioral risk factor surveillance: 1981–1987. Public Health Reports 103, 366375.Google Scholar
Richardson, MT, Leon, AS, Jacobs, DR, Ainsworth, BE & Serfass, R (1994) Comprehensive evaluation of the Minnesota Leisure Time Physical Activity Questionnaire. Journal of Clinical Epidemiology 47, 271281.CrossRefGoogle ScholarPubMed
Riddoch, CJ (1998) Relationships between physical activity and health in young people. In Young and Active, pp. 1748 [Biddle, SJH, Sallis, JF and Cavill, NC, editors]. London: Health Education Authority.Google Scholar
Riddoch, CJ & Boreham, CAG (1995) The health-related physical activity of children. Sports Medicine 19, 86102.CrossRefGoogle ScholarPubMed
Riddoch, CJ, Mahoney, C, Murphy, N, Boreham, C & Cran, G (1991) The physical activity patterns of Northern Irish schoolchildren ages 11–16 years. Pediatric Exercise Science 3, 300309.CrossRefGoogle Scholar
Riddoch, CJ, Murphy, N, Nicholls, A, Van Wersche, A & Cran, G (1990) The Northern Ireland Health and Fitness Survey. Belfast: The Queen's University of Belfast.Google Scholar
Rissanen, AM, Heliövaara, M, Knekt, P, Reunanen, A & Aromaa, A (1991) Determinants of weight gain and overweight in adult Finns. European Journal of Clinical Nutrition 45, 419430.Google ScholarPubMed
Robinson, TN, Hammer, LD, Killen, JD, Kraemer, HC, Wilson, DM, Hayward, C & Taylor, CB (1993) Does television viewing increase obesity and decrease physical activity? Cross-sectional and longitudinal analyses among adolescent girls. Pediatrics 91, 273280.CrossRefGoogle Scholar
Robinson, TN & Killen, JD (1995) Ethnic and gender differences in the relationships between television viewing and obesity, physical activity, and dietary fat intake. Journal of Health Education 26, Suppl., 9198.CrossRefGoogle Scholar
Ross, JG & Gilbert, GG (1985) The National Children and Youth Fitness Study: a summary of findings. Journal of Physical Education, Recreation and Dance 56, 4550.CrossRefGoogle Scholar
Rowland, TW (1996) Is there a scientific rationale supporting the value of exercise for the present and future cardiovascular health of children? The con argument. Pediatric Exercise Science 8, 303309.CrossRefGoogle Scholar
Sallis, JF (1993) Epidemiology of physical activity and fitness in children and adolescents. Critical Reviews in Food Science and Nutrition 33, 403408.CrossRefGoogle ScholarPubMed
Sallis, JF (2000) Age-related decline in physical activity: a synthesis of human and animal studies. Medicine and Science in Sports and Exercise 32, 15981600.CrossRefGoogle ScholarPubMed
Sallis, JF, Condon, SA, Goggin, KJ, Roby, JJ, Kolody, B & Alcarez, JE (1993) The development of self-administered physical activity surveys for 4th grade students. Research Quarterly for Sport and Exercise 64, 2531.CrossRefGoogle ScholarPubMed
Sallis, JF, Haskell, WL, Wood, PD, Fortmann, SP, Rogers, T, Blair, SN & Paffenbarger, RS (1985) Physical activity assessment methodology in the Five-City Project. American Journal of Epidemiology 121, 91106.CrossRefGoogle ScholarPubMed
Sallis, JF & Hovell, MF (1990) Determinants of exercise behaviour. Exercise and Sports Science Reviews 18, 307330.CrossRefGoogle Scholar
Sallis, JF, Hovell, MF, Hofstetter, CR, Faucher, P, Elder, JP, Blanchard, J, Caspersen, CJ, Powell, KE & Christensen, GM (1989) A multivariate study of determinants of vigorous exercise in a community sample. Preventive Medicine 18, 2034.CrossRefGoogle Scholar
Sallis, JF & Owen, N (1999) Physical Activity and Behavioral Medicine. Thousand Oaks, CA: Sage.Google Scholar
Sallis, JF & Patrick, K (1994) Physical activity guidelines for adolescents: consensus statement. Pediatric Exercise Science 6, 302314.CrossRefGoogle Scholar
Saris, WHM (1985) The assessment and evaluation of daily physical activity in children: a review. Acta Paediatrica Scandinavica 318, 3748.CrossRefGoogle ScholarPubMed
Saris, WHM (1986) Habitual physical activity in children: methodology and findings in health and disease. Medicine and Science in Sports and Exercise 18, 253263.CrossRefGoogle ScholarPubMed
Schoeller, DA & Racette, SB (1990) A review of field techniques for the assessment of energy expenditure. Journal of Nutrition 120, 14921495.CrossRefGoogle ScholarPubMed
Schonfeld-Warden, N & Warden, CH (1997) Pediatric obesity: an overview of etiology and treatment. Pediatric Clinics of North America 44, 339361.CrossRefGoogle ScholarPubMed
Serdula, MK, Ivery, D, Coates, RJ, Freedman, DS, Williamson, DF & Byers, T (1993) Do obese children become obese adults? A review of the literature. Preventive Medicine 22, 167177.CrossRefGoogle ScholarPubMed
Shah, M & Jeffery, RW (1991) Is obesity due to overeating and inactivity, or to a defective metabolic rate? A review. Annals of Behavioral Medicine 13, 7381.Google Scholar
Shannon, B, Peacock, J & Brown, MJ (1995) Body fatness, television viewing and caloric-intake of a sample of Pennsylvania Sixth Grade Children. Journal of Nutrition Education 23, 262268.CrossRefGoogle Scholar
Shephard, RJ (1986) Fitness of a nation: lessons from the Canada Fitness Survey. Medicine and Sports Science 22, 116131.CrossRefGoogle Scholar
Shields, DLL & Bredemeier, BJL (1994) Character Development and Physical Activity. Champaign, IL: Human Kinetics.Google Scholar
Simoes, EJ, Byers, T, Coates, RJ, Serdula, M, Mokdad, AH & Heath, GW (1995) The association between leisure-time physical activity and dietary fat in American adults. American Journal of Public Health 85, 240244.CrossRefGoogle ScholarPubMed
Simons-Morton, B, O'Hara, N, Simons-Morton, D & Parcel, G (1987) Children and fitness: A public health perspective. Research Quarterly for Exercise and Sport 58, 295302.CrossRefGoogle Scholar
Slattery, ML, McDonald, A, Bild, DE, Caan, BJ, Hilner, JE, Jacobs, DR & Liu, K (1992) Associations of body fat and its distribution with dietary intake, physical activity, alcohol, and smoking in blacks and whites. American Journal of Clinical Nutrition 55, 943949.CrossRefGoogle ScholarPubMed
Sleap, M & Tolfrey, K (2001) Do 9- to 12 yr-old children meet existing physical activity recommendations for health?. Medicine and Science in Sports and Exercise 33, 591596.CrossRefGoogle ScholarPubMed
Sport England (2000) Young People and Sport in England 1999. London: Sport England.Google Scholar
Stager, JM, Lindeman, A & Edwards, J (1995) The use of doubly labelled water in quantifying energy expenditure during prolonged activity. Sports Medicine 19, 166172.CrossRefGoogle ScholarPubMed
Stephens, T (1988) Physical activity and mental health in the United States and Canada: evidence from four population surveys. Preventive Medicine 17, 3547.CrossRefGoogle ScholarPubMed
Stephens, T & Caspersen, CJ (1994) The demography of physical activity. In Physical Activity, Fitness and Health, pp. 204213 [Bouchard, C, Shephard, RJ and Stephens, T, editors]. Champaign, IL: Human Kinetics.Google Scholar
Steptoe, A & Butler, N (1996) Sports participation and emotional well being in adolescents. Lancet 347, 17891792.CrossRefGoogle ScholarPubMed
Sunnegardh, J, Bratteby, L-E, Hagman, U, Samuelson, G & Sjolin, S (1986) Physical activity in relation to energy intake and body fat in 8- and 13-year old children in Sweden. Acta Paediatrica Scandinavica 75, 955963.CrossRefGoogle Scholar
Taylor, CB, Sallis, JF & Needle, R (1985) The relationship of physical activity and exercise to mental health. Public Health Reports 100, 195201.Google Scholar
Taylor, WC, Blair, SN, Cummings, SS, Wun, CC & Malina, RM (1999) Childhood and adolescent physical activity patterns and adult physical activity. Medicine and Science in Sports and Exercise 31, 118123.CrossRefGoogle ScholarPubMed
Telema, R & Yang, X (2000) Decline of physical activity from youth to young adulthood in Finland. Medicine and Science in Sports and Exercise 32, 16171622.CrossRefGoogle Scholar
Tell, GS & Vellar, OD (1988) Physical fitness, physical activity and cardiovascular disease risk factors in adolescents: the Oslo Youth Study. Preventive Medicine 17, 1224.CrossRefGoogle ScholarPubMed
Torun, B, Davies, PSW, Livingstone, MBE, Paolisso, M, Sackett, R & Spurr, GB (1996) Energy requirements and dietary energy recommendations for children and adolescents 1 to 18 years old. European Journal of Clinical Nutrition. 50 Suppl. 1, S37S81.Google ScholarPubMed
Treuth, MS, Adolph, AL & Butte, NF (1998) Energy expenditure in children predicted from heart rate and activity calibrated against respiration calorimetry. American Journal of Physiology 275, E12E18.Google ScholarPubMed
Troiano, RP, Flegal, KM, Kuczmarski, RJ, Campbell, SM & Johnson, CL (1995) Overweight prevalence and trends for children and adolescents: The National Health and Nutrition Examination Surveys, 1963 to 1991. Archives of Pediatrics and Adolescent Medicine 149, 10851091.CrossRefGoogle ScholarPubMed
Troiano, RP, Macera, CA & Ballard-Barbash, R (2001) Be physically active each day. How can we know?. Journal of Nutrition 131, 451S460S.CrossRefGoogle ScholarPubMed
Troisi, RJ, Heinold, JW, Vokonos, PS & Weiss, ST (1991) Cigarette smoking, dietary intake, and physical activity: effects on body fat distribution – the Normative Aging Study. American Journal of Clinical Nutrition 53, 11041111.CrossRefGoogle ScholarPubMed
Trost, SG (2001) Objective measurement of physical activity in youth: current issues, future directions. Exercise and Sport Sciences Reviews 29, 3236.CrossRefGoogle ScholarPubMed
Tucker, LA (1986) The relationship of television viewing to physical fitness and obesity. Adolescence 21, 797806.Google ScholarPubMed
Twisk, JWR, Kemper, HCG, Van Mechelen, W, Post, GB & Van Lenthe, FJ (1998) Body fatness: longitudinal relationship of body mass index and the sum of skinfolds with other risk factors for coronary heart disease. International Journal of Obesity 22, 915922.CrossRefGoogle ScholarPubMed
Twisk, JWR, Van Mechelen, W, Kemper, HCG & Post, GB (1997) The relation between 'long-term exposure' to lifestyle during youth and young adulthood and risk factors for cardiovascular disease at adult age. Journal of Adolescent Health 20, 309319.CrossRefGoogle Scholar
US Department of Agriculture, Agricultural Research Service, Dietary Guidelines Advisory Committee (2000) Report of the Dietary Guidelines Advisory Committee on the Dietary Guidelines for Americans, 2000. http://www.health.gov/ dietaryguidelines/dgac/.Google Scholar
US Department of Health and Human Services (1996) Physical Activity and Health: A Report of the Surgeon General, US Department of Health and Human Services, Centers for Disease Control and Prevention. Atlanta, GA: National Center for Chronic Disease Prevention and Health Promotion.Google Scholar
Vaccaro, P & Mahon, AD (1989) The effects of exercise on coronary heart disease risk factors in children. Sports Medicine 8, 139153.CrossRefGoogle ScholarPubMed
Vanhala, M, Vanhala, P, Kumpusalo, E, Halonen, P & Takala, J (1998) Relation between obesity from childhood to adulthood and the metabolic syndrome: population based study. British Medical Journal 317, 319.CrossRefGoogle ScholarPubMed
Van Mechelen, W, Twisk, JWR, Post, GB, Snel, J & Kemper, HCG (2000) Physical activity of young people; the Amsterdam Longitudinal Growth and Health Study. Medicine and Science in Sports and Exercise 32, 16101616.CrossRefGoogle ScholarPubMed
Voorrips, LE, Meijers, JHH, Sol, P, Seidell, JC & Van Staveren, WA (1991) History of body weight and physical activity of elderly women differing in current physical activity. International Journal of Obesity 16, 199205.Google Scholar
Wannamethee, G & Shaper, AG (1992) Physical activity and stroke in British middle-aged men. British Medical Journal 304, 597601.CrossRefGoogle ScholarPubMed
Wareham, NJ, Hennings, SJ, Prentice, AM & Day, NE (1997) Feasibility of heart-rate monitoring to estimate total level and pattern of energy expenditure in a population-based epidemiological study: the Ely young cohort feasibility study 1994–1995. British Journal of Nutrition 78, 889900.CrossRefGoogle Scholar
Wareham, NJ & Rennie, KL (1998) The assessment of physical activity in individuals and populations: Why try to be more precise about how physical activity is assessed?. International Journal of Obesity 22 Suppl. 2, S30S38.Google ScholarPubMed
Webber, LS, Osganian, SK, Feldman, HA, Wu, M, McKenzie, TL, Nichaman, M, Lytle, LA, Edmundson, E, Cutler, J, Nader, PR & Luepker, RV, (1996) Cardiovascular risk factors among children after a two and a half year intervention – The CATCH Study. Preventive Medicine 25, 432441.CrossRefGoogle Scholar
Welk, GJ, Corbin, CB (1995) The validity of the Tritrac – R3D Activity Monitor for the assessment of physical activity in children. Research Quarterly for Exercise and Sport 66, 202209.CrossRefGoogle ScholarPubMed
Welk, GJ, Corbin, CB & Dale, D (2000) Measurement issues in the assessment of physical activity in children. Research Quarterly for Exercise and Sport 71, Suppl., 5973.CrossRefGoogle ScholarPubMed
Welk, GJ, Corbin, CB & Kampert, JB (1998) The validity of the Tritrac-R3D activity monitor for the assessment of physical activity: II. Temporal relationships among objective assessments. Research Quarterly for Exercise and Sport 69, 395399.CrossRefGoogle ScholarPubMed
Weller, I & Corey, P (1998) The impact of excluding non-leisure energy expenditure on the relation between physical activity and mortality in women. Epidemiology 9, 632635.CrossRefGoogle ScholarPubMed
Westerterp, KR (1999 a) Assessment of physical activity level in relation to obesity: current evidence and research issues. Medicine and Science in Sports and Exercise 31, Suppl., S522S525.CrossRefGoogle ScholarPubMed
Westerterp, KR (1999 b) Physical activity assessment with accelerometers. International Journal of Obesity 23, Suppl. 3, 4549.CrossRefGoogle ScholarPubMed
Westerterp, KR & Bouten, CVC (1997) Physical activity assessment: comparison between movement registration and doubly labeled water method. Zeitschrift für Ernährungswissenschaft 36, 263267.CrossRefGoogle ScholarPubMed
Whitaker, RC, Wright, JA, Pepe, MS, Seidel, KD & Dietz, WH (1997) Predicting obesity in young adulthood from childhood and parental obesity. New England Journal of Medicine 337, 869873.CrossRefGoogle ScholarPubMed
Wickham, CAC, Walsh, K, Cooper, C, Barker, DJP, Margetts, BM, Morris, J & Bruce, SA (1989) Dietary calcium, physical activity, and risk of hip fracture: a prospective study. British Medical Journal 299, 889892.CrossRefGoogle ScholarPubMed
Williams, PT (1997) Evidence for the incompatibility of age-neutral overweight and age-neutral physical activity standards for runners. American Journal of Clinical Nutrition 65, 13911396.CrossRefGoogle ScholarPubMed
Williamson, DF, Madans, J, Anda, RF, Kleinman, JC, Kahn, HS & Byers, T (1993) Recreational physical activity and ten-year weight change in a US national cohort. International Journal of Obesity 17, 279286.Google Scholar
Wing, RR (1999) Physical activity in the treatment of adult overweight and obesity: current evidence and research issues. Medicine and Science in Sports and Exercise 31, Suppl., S547S552.CrossRefGoogle ScholarPubMed
Wolf, AM, Gortmaker, SL, Cheung, L, Gray, HM, Herzog, DB & Colditz, GA (1993) Activity, inactivity, and obesity: racial, ethnic, and age differences among schoolgirls. American Journal of Public Health 83, 16251627.CrossRefGoogle ScholarPubMed
Wong, MY, Day, NE & Wareham, NJ (1999) Measurement error in epidemiology: the design of validation studies II: the multivariate situation. Statistics in Medicine 18, 28312845.3.0.CO;2-3>CrossRefGoogle ScholarPubMed
Wong, ND, Hei, TK, Qaqundah, PY, Davidson, DM, Bassin, SL & Gold, KV (1992) Television viewing and pediatric hypercholesterolemia. Pediatrics 90, 7579.CrossRefGoogle ScholarPubMed