Aerobic and anaerobic threshold of Japanese male adults.

Aerobic threshold (AerT) and anaerobic threshold (AnT) were determined in 20 non-athletes (physical education majors) and 10 athletes (varsity athletes), aged 20.8-31.5 years, during incremental exercise on the cycle ergometer; workloads were increased by 0.25 Kp every 3 minutes at 50 rpm. AerT was determined using selected respiratory gas exchange parameters, i.e., non-linear increase in VE and VCO2, and peak VO2 . VE-1. AnT was estimated from break-away VE and the onset of decrease in FECO2. The reliability of the testing procedure was studied separately on 24 physical education majors. VO2 max was measured during another incremental exercise on the cycle ergometer. The mean values of VO2 max for non-athletes and athletes were 3.17 l/min (48.1 ml/kg . min) and 3.64 l/min (54.7 ml/kg . min), respectively. The test-retest correlation coefficients were 0.961 for VO2-AerT and 0.786 for VO2-AnT. The mean values of VO2-AerT and %AerT were 1.62 l/min and 51.0% for non-athletes, and 2.23 l/min and 61.9% for athletes. The mean values of VO2-AnT and %AnT were 2.09 l/min and 66.3% for non-athletes, 2.49 l/min and 69.2% for athletes.