Abstract
PURPOSE: The present study investigated the effects of high- versus low-quality protein supplementation on the regain of exercise performance during recovery from a period of high-intensity resistance training.
METHODS: In a diet-controlled crossover study, 12 resistance-trained participants performed two identical training periods, with each training period including four sessions of high-intensity resistance exercise during 5 days, while receiving either high- or low-quality protein. Prior to and at 3, 24 and 48 h after the training periods, performance was evaluated in knee extensor and flexor isometric maximal voluntary contraction (MVC), counter-movement jumping height (CMJ), and peak and mean anaerobic power. In addition, prior to and at 48 h after the training periods, performance in time-to-exhaustion at 70 % of VO2max (TTE) was evaluated.
RESULTS: After the intense training periods, decrements in the order of 4-24 % were observed for MVCext, CMJ, mean anaerobic power, and TTE. In particular for TTE, this decrement in exercise performance did not attain full recovery at 48 h post-exercise. The regain of exercise performance was not dictated by type of protein supplement.
CONCLUSION: The regain of muscle strength as well as anaerobic or aerobic performances were not markedly influenced by the type of protein supplement.
| Original language | English |
|---|---|
| Journal | European Journal of Applied Physiology |
| Volume | 116 |
| Issue | 11 |
| Pages (from-to) | 2225–2236 |
| Number of pages | 12 |
| ISSN | 1439-6319 |
| DOIs | |
| Publication status | Published - 1 Dec 2016 |
Keywords
- Athletic performance
- Collagen protein
- Humans
- Protein quality
- Strength training
- Whey protein