Effects of immersion in tepid bath water on recovery from fatigue after submaximal exercise in man.

This study was conducted to determine whether bathing in tepid water is effective in facilitating recovery from fatigue after submaximal exercise. Subjects were six young healthy male university students. Following cycle exercise at 80% aerobic power (VO2 max) for 10 min, recovery was observed during and after 10-min bathing. Three conditions were set; (1) water temperature of 38 degrees C, (2) water temperature of 30 degrees C, and (3) no water in the bath tub (control). Measurements were heart rate, blood pressure, skin temperature, rectal temperature, blood lactase and subjective feelings. There were no significant differences in heart rate and blood pressure between the three conditions at any time. Mean skin temperature and rectal temperature decreased more rapidly after the 30 degrees C bathing than the other two conditions (p < 0.05). Lactate removal was largest for the 30 degrees C bathing, with significant difference between the 30 degrees C bathing condition and the no bathing condition (p < 0.05). Recovery from fatigue was best for the 30 degrees C bathing and worst for the control in terms of subjective feeling. In summary, it was shown that immersion in 30 degrees C water after submaximal exercise resulted in a larger removal of lactate than recovery in air.