HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Purchase Article View Shopping Cart Alert me when this article is cited Alert me if a correction is posted Citation Map Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Hartman, J. W Articles by Phillips, S. M Search for Related Content PubMed PubMed Citation Articles by Hartman, J. W Articles by Phillips, S. M Agricola Articles by Hartman, J. W Articles by Phillips, S. M

Consumption of fat-free fluid milk after resistance exercise promotes greater lean mass accretion than does consumption of soy or carbohydrate in young, novice, male weightlifters^1,2,3

¹ From the Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, ON, Canada (JWH, JET, SBW, RLL, AVF, and SMP), and Pediatrics and Medicine, McMaster University Medical Centre, Hamilton, ON, Canada (MAT)

Background: Acute consumption of fat-free fluid milk after resistance exercise promotes a greater positive protein balance than does soy protein.

Objective: We aimed to determine the long-term consequences of milk or soy protein or equivalent energy consumption on training-induced lean mass accretion.

Design: We recruited 56 healthy young men who trained 5 d/wk for 12 wk on a rotating split-body resistance exercise program in a parallel 3-group longitudinal design. Subjects were randomly assigned to consume drinks immediately and again 1 h after exercise: fat-free milk (Milk; n = 18); fat-free soy protein (Soy; n = 19) that was isoenergetic, isonitrogenous, and macronutrient ratio matched to Milk; or maltodextrin that was isoenergetic with Milk and Soy (control group; n = 19).

Results: Muscle fiber size, maximal strength, and body composition by dual-energy X-ray absorptiometry (DXA) were measured before and after training. No between-group differences were seen in strength. Type II muscle fiber area increased in all groups with training, but with greater increases in the Milk group than in both the Soy and control groups (P < 0.05). Type I muscle fiber area increased after training only in the Milk and Soy groups, with the increase in the Milk group being greater than that in the control group (P < 0.05). DXA-measured fat- and bone-free mass increased in all groups, with a greater increase in the Milk group than in both the Soy and control groups (P < 0.05).

Conclusion: We conclude that chronic postexercise consumption of milk promotes greater hypertrophy during the early stages of resistance training in novice weightlifters when compared with isoenergetic soy or carbohydrate consumption.

Key Words: Hypertrophy • strength • resistance exercise • protein

This article has been cited by other articles:

				D. Paddon-Jones, K. R Short, W. W Campbell, E. Volpi, and R. R Wolfe Role of dietary protein in the sarcopenia of aging Am. J. Clinical Nutrition, May 1, 2008; 87(5): 1562S - 1566S. [Abstract] [Full Text] [PDF]

				M. J. Drummond, H. C. Dreyer, B. Pennings, C. S. Fry, S. Dhanani, E. L. Dillon, M. Sheffield-Moore, E. Volpi, and B. B. Rasmussen Skeletal muscle protein anabolic response to resistance exercise and essential amino acids is delayed with aging J Appl Physiol, May 1, 2008; 104(5): 1452 - 1461. [Abstract] [Full Text] [PDF]

				J. E. Tang, J. G. Perco, D. R. Moore, S. B. Wilkinson, and S. M. Phillips Resistance training alters the response of fed state mixed muscle protein synthesis in young men Am J Physiol Regulatory Integrative Comp Physiol, January 1, 2008; 294(1): R172 - R178. [Abstract] [Full Text] [PDF]