Proceedings of the Nutrition Society

The Summer Meeting of the Nutrition Society hosted by the Scottish Section, Heriot-Watt University, Edinburgh.28 June–1 July 2010,

Conference on ‘Nutrition and health: cell to community’

Symposium 2: Exercise and protein nutrition

The science of muscle hypertrophy: making dietary protein count

Stuart M. Phillipsa1 c1

a1 Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, 1280 Main St West, Hamilton, ON L8S 4K1, Canada

Abstract

Growing evidence supports the conclusion that consumption of protein in close temporal proximity to the performance of resistance exercise promotes greater muscular hypertrophy. We can also state with good certainty that merely consuming energy, as carbohydrate for example, is also not sufficient to maximise muscle protein synthesis leading to anabolism and net new muscle protein accretion. Recent work also indicates that certain types of proteins, particular those that are rapidly digested and high in leucine content (i.e. whey protein), appear to be more efficient at stimulating muscle protein synthesis. Continued practice of consumption of these types or proteins after exercise should lead to greater hypertrophy. Reviews of numerous training studies indicate that studies in which milk proteins and principally whey protein show an advantage of these proteins over and above isoenergetic carbohydrate and soya protein in promoting hypertrophy. Thus, the combined evidence suggests a strategic advantage of practising early post-exercise consumption of whey protein or dairy-based protein to promote muscle protein synthesis, net muscle protein accretion and ultimately hypertrophy.

(Online publication November 22 2010)

Correspondence:

c1 Corresponding author: Professor S. M. Phillips, fax +1-905-523-6011, email phillis@mcmaster.ca