2.2. Study Design
This study was designed as a randomized, double-blind, placebo-controlled trial. After the random assignment of participants into 2 groups, the PSG was given a whey protein supplement, and the CON was given a placebo containing carbohydrates. Both groups underwent resistance exercise training for 4 weeks. For dietary control, each participant was given 3 meals a day corresponding to the estimated daily energy intake calculated by the individual amount of exercise and resting metabolic rate for the entire period of the study. Body composition and isokinetic muscular function were measured before and after the intervention.