Does whey-protein and leucine enhance physical performance, cognitive performance and lean body mass?
From: International Journal of Sports Nutrition and Exercise Metabolism
- Glahn, J., 2010. The Influence of 8 Weeks of Whey-Protein and Leucine Supplementation on Physical and Cognitive Performance
- 30 moderately fit participants
- Participants supplemented their daily diet for 8 wk with either 19.7 g of whey protein and 6.2g leucine (WPL) or a calorie-equivalent placebo (P).
- Bench-press performance increased significantly from Week 1 to Week 8 in the WPL group, whereas the increase in the P group was not significant.
- Push-up performance increased significantly for WPL, and P showed a nonsignificant increase.
- Total mass, fat-free mass, and lean body mass all increased significantly in the WPL group but showed no change in the P group.
- No differences were observed within or between groups for crunches, chin-ups, 3-mile-run time, or cognition
- Yes (without confidence)
- The authors conclude that supplementing with whey protein and leucine may provide an advantage to people whose performance benefits from increased upper body strength and/or lean body mass.