The purpose of the present study was to examine the effects of high intensity training in hypoxic condition on buffer capacity of human skeletal muscle and high intensity exercise performance. Twelve active university students participated in this study. They performed 8-weeks of twice a week high intensity training using 30-s maximal pedaling exercise in hypoxic condition (Hypo: n=6) or normoxic condition (Norm: n=6). Peak power and mean power during pedaling exercise were measured throughout training. Carnosin concentration was determined from a biopsy sample and thigh muscle crosssectional area was measured by Magnetic resonance imaging before and after training. Maximal oxygen consumption and non-metabolic CO₂ were also measured during incremental pedaling exercise tests performed before and after training. Peak power gradually increased only in Hypo. Mean power gradually increased in both groups but the increase rate of Hypo was greater than that of Norm, although it was not significant. Carnosin concentration increased in both groups (p<0.05) but the increase was slightly greater in Hypo. These results suggest that high-intensity training in hypoxic condition may have improved muscle buffer capacity, power and endurance capacity of power.

DESCENTE SPORTS SCIENCE Vol.22/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE