抄録
Nineteen adult females performed an exhausting series of treadmill walks for determinations of maximal oxygen intake under three air temperature conditions of 20°C, 30°C, and 40°C. The relative humidity was kept at 50% throughout. The value of maximal oxygen intake at 30°C was the largest among those tested here and the effect of quadratic component of air temperature factor on maximal oxygen intake was statistically signifilcant. The lower border of 95% confldence interval at the extreme value of maximal oxygen intake was calculated to be 41.475 ml/kg·min according to the quadratic regression equation of maximal oxygen intake of air temperature and standard error of estimated maximal oxygen intake from the regression. 41.475 ml/kg·min was confirrned to be correspondent with the estimated maximal oxygen intake at 24.2°C and that at 39.6°C. Therefore, the lower and upper critical temperatures formaximal oxygen intake in adult females were predicted to be 24.2°C and 39.6°C, respectively.
