ABSTRACT

　The purpose of the present study was to determine effect of wearing compression garments （CG） with different pressure level on muscle oxygenation, glucose metabolism and exercise performance during prolonged pedaling. Ten triathletes variables were evaluated during 90 min of pedaling. After completing 90 min of pedaling, time to exhaustion（ TTE） test was conducted at 85% of V･O2max. Exercise rapidly increased 13C excretion, but highest value of 13C excretion wasshown earlier in the MED trial （47.1±9.9 min） compared with in the other trials（HIGH trial; 67.3±23.7 min, CON trial; 53.95±9.5 min, P<0.05）．No significantdifference was observed for changes in other variables and TTE among the trials.In conclusion, wearing CG which exerted 20 hPa on the thigh facilitated exogenousglucose utilization during 90 min of pedaling.（19.9±1.2 years, 172.2±4.4 cm, 62.0±3.8 kg，BMI; 20.9±0.7 kg?m-2; V･O2max;59.3±4.4 ml?kg-1?min-1） completed three trials on different days, consisting of 1）exercise with wearing CG which exerted high pressure on the thigh （approximately40 hPa, HIGH） 2）， exercise with wearing CG which exerted moderate pressure on thethigh （approximately 20 hPa, MED） 3）， exercise with normal sport garments whichexerted low pressure on the thigh （below 10 hPa, CON）．Each trial was performedwith randomized orders, and four weeks of washout period were provided between thetrials. The exercise consisted 90 min of pedaling at 65% of maximal oxygen uptake（V･O2max）．Time-courses of changes in heart rate（ HR），ratings of perceived exertion（RPE）， oxy-hemoglobin, exogenous glucose utilization（ 13C glucose） and respiratory

DECENTE SPORTS SCIENCE Vol.40/The DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE