The effects of leucine and whey protein supplementation with eight weeks of resistance training on strength and body composition.

BACKGORUND: In past few decades, supplementation has become very popular within profesional and recreational athletes. Most interested among supplements are protein and amino acids. Therefore, the purpose of this study was to examine the effects of leucine supplementation in comparison to whey protein supplementation with placebo group on strength and body composition during 8 weeks of resistance training program. METHODS: Thirty male college athletes (mean age +/- SD = 23.92 +/- 1.54 years) paricipated in this investigation and were randomly assigned to one of three groups: whey protein (WP, n=10), leucine (LEU, n=10) or placebo (PLA, n=10). The WP, LEU and PLA performed resistance training for 8 weeks. Strength (1RM bench press, squat, shoulder press) and maximum pull-ups and body composition has been assessed and data was analyzed with mixed-design analysis of variance (p