| Keywords |
Heat environment ; Skin temperature ; Rectal temperature ; Lactate |
| Abstract |
To examine the effects of partial body cooling during intermittent exercise on body thermal regulatory andmetabolic responses, 5 healthy men (20 yrs., 174.0±3.4cm, 64.8±5.9kg, 21.3±1.2kg/m2) were recruited. They partic-ipated in two separate testings in a hot environment, in which they rested for 15min followed by 15min running,5min resting, 15min running, 5min resting, 15min running, and 15min recovery in 31±1oC, 60~70% relative humidity.The exercise intensity was fixed at 75% of individual VO2max. In one occasion, they rested in a bathtub in a recumbentposition in 31oC air (heat treatment : HT) during the resting periods, and in another occasion, they rested in 15oCwater (cold treatment : CT). During testings, rectal (Tre) and skin (Tsk) temperatures, metabolic responses, and bloodparameters were measured. CT showed lower Tre and Tsk during resting and recovery periods in CT than HT. Bloodlactate was lower during exercise and resting in CT than HT. It appears that partial body cooling during intermittentexercises may help reducing thermal and metabolic stress that may challenge exercise task. |