Document Detail

Whey Protein Before and During Resistance Exercise Has No Effect on Muscle Mass and Strength in Untrained Young Adults.
MedLine Citation:
PMID:  22806076     Owner:  NLM     Status:  Publisher    
PURPOSE: To determine the effects of whey protein before and during resistance exercise (RE) on body composition and strength in young adults. METHODS: Participants were randomized to ingest whey protein (PRO; 0.3g·kg-1 protein; n=9, 24.58±1.8 yrs, 88.3±17.1 kg, 172.5±8.0 cm) or placebo (PLA; 0.2g·kg-1 corn-starch maltodextrin + 0.1g·kg-1 sucrose; n=8, 23.6±4.4 yrs, 82.6±16.1 kg, 169.4±9.2 cm) during RE (3 sets of 6-10 repetitions for 9 whole-body exercises), which was performed 4 days per week for 8 weeks. Protein and placebo were mixed with water (600ml) and 50% of the solution containing 0.15g·kg-1 of protein or placebo was consumed immediately prior to the start of exercise and ~1.9% of the remaining solution containing ~0.006g·kg-1 of protein or placebo was consumed immediately following each training set. Before and after the study, measures were taken for lean tissue mass (dual energy x-ray absorptiometry), muscle size of the elbow and knee flexors and extensors and ankle dorsi flexors and plantar flexors (ultrasound), and muscle strength (1-repetition maximum chest press). RESULTS: There was a significant increase (p<0.05) in muscle size of the knee extensors (PRO: 0.6±0.4 cm, PLA: 0.1±0.5 cm), knee flexors (PRO: 0.4±0.6 cm, PLA: 0.5±0.7 cm), ankle plantar flexors (PRO: 0.6±0.7 cm, PLA: 0.8±1.4 cm), and chest press strength (PRO: 16.6±11.1 kg, PLA: 9.1±14.6 kg) over time, with no differences between groups. CONCLUSION: The ingestion of whey protein immediately before the start of exercise and again following each training set has no effect on muscle mass and strength in untrained young adults.
Krissy D Weisgarber; Darren G Candow; S M Vogt E
Related Documents :
8585466 - Fatigue and the design of the respiratory system.
20204796 - Active muscle oxygenation dynamics measured during high-intensity exercise by using two...
1810026 - Respiratory gas exchange during treadmill exercise testing: reproducibility and compari...
2782256 - A brief self-administered questionnaire to determine functional capacity (the duke acti...
19744086 - Cardiac vagal activity following three intensities of exercise in humans.
3595246 - Role of exercise doppler echocardiography in isolated mitral stenosis.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-7-4
Journal Detail:
Title:  International journal of sport nutrition and exercise metabolism     Volume:  -     ISSN:  1543-2742     ISO Abbreviation:  -     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-7-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100939812     Medline TA:  Int J Sport Nutr Exerc Metab     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Faculty of Kinesiology and Health Studies, University of Regina, Regina, Saskatchewan, Canada.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  The roles of benzoic acid and water on the Michael reactions of pentanal and nitrostyrene catalyzed ...
Next Document:  Synthesis and characterisation of large chlorapatite single-crystals with controlled morphology and ...