Postexercise protein intake enhances whole-body and leg protein accretion in humans
Levenhagen DK, Carr C, Carlson MG, Maron DJ, Borel MJ, Flakoll PJ
Med Sci Sports Exerc 2002; 34: 828-837
To determine the potential of postexercise nutrient intake to enhance the recovery of whole-body and skeletal muscle protein homeostasis in humans.
Ten healthy subjects (5 male, 5 female) were each given either a protein and glucose supplement (10g of protein, 8g of glucose, 3g of fat), glucose placebo (0g protein, 8g glucose, 3g fat), or no supplement, and a crossover study performed. Immediately after a one-hour recumbent bicycle exercise (at 60% of VO2) subjects were given a protein and glucose supplement or glucose placebo, and muscle protein metabolism evaluated three hours after the exercise using a stable isotope labeling (Phe2H5 -Phe) method to measure the arteriovenous difference.
Compared to the group that took no supplement, the group consuming a glucose placebo immediately after exercise exhibited no increase in protein synthesis. Net proteolysis was found to equate to protein intake. By contrast, the group consuming a protein and glucose supplement immediately after exercising exhibited greater protein synthesis than when consuming no supplement or when only consuming a placebo, showing a net gain in protein synthesis.
The results show that promoting greater muscle protein synthesis post-exercise requires not only an intake of glucose but also protein.
Search related keywords
Other Focus Areas
Delivering rehydration that is essential to the body while replenishing electrolytes (ions)
Offering new ways to enjoy whole soy nutrition, focusing on the potential of soy as an approach to the various challenges humanity faces