薬理と治療

Abstract

Objectives　The aim of the present study was to investigate effects of whey protein containing soy-derived peptide（SOYLAX®）on responses to stresses and self-rated health in athletes. Methods　In this two-weeks-trial, 26 healthy volunteers who belonged to a university baseball team were recruited and divided into two groups. Test articles（whey protein containing 1000 mg of SOYLAX®）were administrated to one group（SOYLAX® group）and placebo whey protein were administered to another one（placebo group）before the practice every day. Concentration of salivary cortisol, Visual Analogue Scale（VAS）, Profile of Mood State 2nd Edition-Adult Short, 12-item General Health Questionnaire, Mood Check List-Short form.2 were repeatedly evaluated. Results　SOYLAX® group showed lower concentration of salivary cortisol than placebo group after the practice on the last day of the trial. The VAS score of satisfaction about physical function in SOYLAX® group was higher than in placebo group on the day after the game. Mental stresses test showed no significant differences between two groups. Conclusions　Drinking whey protein containing SOYLAX® could alleviate stresses after sports and improve the satisfaction about physical function in athletes. SOYLAX® would support athletes to show the best performances of them.