Protein Supplementation Has Minimal Effects on Muscle Adaptations during Resistance Exercise Training in Young Men: A Double-Blind Randomized Clinical Trial
| Autor: | Dillon K. Walker, Paul T. Reidy, Janine Hall-Porter, Rachel R Deer, Kristofer Jennings, Shay M Robertson, Syed H Husaini, Michael S. Borack, Melissa M. Markofski, Blake B. Rasmussen, Mark B. Cope, Ratna Mukherjea, Elena Volpi, Jared M. Dickinson, Sherry Igbinigie |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
medicine.medical_specialty 030109 nutrition & dietetics Nutrition and Dietetics Muscle adaptation Random assignment Strength training Medicine (miscellaneous) 030229 sport sciences Biology Placebo law.invention 03 medical and health sciences 0302 clinical medicine Endocrinology Randomized controlled trial Plant protein law Internal medicine medicine Lean body mass Physical therapy Body mass index |
| Zdroj: | The Journal of Nutrition. 146:1660-1669 |
| ISSN: | 0022-3166 |
| Popis: | Background: To our knowledge the efficacy of soy-dairy protein blend (PB) supplementation with resistance exercise training (RET) has not been evaluated in a longitudinal study. Objective: Our aim was to determine the effect of PB supplementation during RET on muscle adaptation. Methods: In this double-blind randomized clinical trial, healthy young men [18–30 y; BMI (in kg/m2): 25 ± 0.5] participated in supervised whole-body RET at 60–80% 1-repetition maximum (1-RM) for 3 d/wk for 12 wk with random assignment to daily receive 22 g PB (n = 23), whey protein (WP) isolate (n = 22), or an isocaloric maltodextrin (carbohydrate) placebo [(MDP) n = 23]. Serum testosterone, muscle strength, thigh muscle thickness (MT), myofiber cross-sectional area (mCSA), and lean body mass (LBM) were assessed before and after 6 and 12 wk of RET. Results: All treatments increased LBM (P 0.10) between treatments. Testosterone was not altered. Conclusions: PB supplementation during 3 mo of RET tended to slightly enhance gains in whole-body and arm LBM, but not leg muscle mass, compared with RET without protein supplementation. Although protein supplementation minimally enhanced gains in LBM of healthy young men, there was no enhancement of gains in strength. This trial was registered at clinicaltrials.gov as {"type":"clinical-trial","attrs":{"text":"NCT01749189","term_id":"NCT01749189"}}NCT01749189. |
| Databáze: | OpenAIRE |
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