| 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. | |
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MedLine Citation:
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PMID: 17684208 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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Joseph W Hartman; Jason E Tang; Sarah B Wilkinson; Mark A Tarnopolsky; Randa L Lawrence; Amy V Fullerton; Stuart M Phillips |
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Publication Detail:
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Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: The American journal of clinical nutrition Volume: 86 ISSN: 0002-9165 ISO Abbreviation: Am. J. Clin. Nutr. Publication Date: 2007 Aug |
Date Detail:
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Created Date: 2007-08-08 Completed Date: 2007-09-25 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0376027 Medline TA: Am J Clin Nutr Country: United States |
Other Details:
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Languages: eng Pagination: 373-81 Citation Subset: AIM; IM |
Affiliation:
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Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, ON, Canada. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Animals Biopsy Body Mass Index Body Weight Dietary Carbohydrates / metabolism* Dietary Fats* Energy Metabolism Exercise Humans Milk* Muscle Fibers, Skeletal / cytology, physiology Muscle Strength / physiology* Muscle, Skeletal / cytology, physiology Questionnaires Reference Values Soybean Proteins* Weight Lifting / physiology* |
| Chemical | |
Reg. No./Substance:
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0/Dietary Carbohydrates; 0/Dietary Fats; 0/Soybean Proteins |
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