Effects of 28 days of beta-alanine and creatine monohydrate supplementation on aerobic power,ventilatory and lactate thresholds,and time to exhaustion

摘要

The effect of beta-alanine (beta-Ala) alone or in combination with creatine monohydrate (Cr) on aerobic exercise performance is unknown.The purpose of this study was to examine the effects of 4 weeks of beta-Ala and Cr supplementation on indices of endurance performance.Fifty-five men (24.5 +- 5.3 yrs) participated in a double-blind,placebo-controlled study and randomly assigned to one of 4 groups;placebo (PL,n = 13),creatine (Cr,n = 12),beta-alanine (beta-Ala,n = 14),or beta-alanine plus creatine (CrBA,n=16).Prior to and following supplementation,participants performed a graded exercise test on a cycle ergometer to determine VO_(2peak),time to exhaustion (TTE),and power output,VO2,and percent VO_(2peak) associated with VT and LT.No significant group effects were found.However,within groups,a significant time effect was observed for CrBa on 5 of the 8 parameters measured.These data suggest that CrBA may potentially enhance endurance performance.