Seiichi Nakai

Effect of aerobic capacity on sweat rate and fluid intake during outdoor exercise in the heat

AbstractWe measured the aerobic capacity, sweat rate and fluid intake of trained athletes during outdoor exercise and examined the relationship between aerobic capacity and thermoregulatory responses at high ambient temperatures. The maximal aerobic capacity (

THE RELATION BETWEEN ENVIRONMENTAL CONDITIONS AND THE OCCURRENCE OF EXERTIONAL HEAT DISORDERS DURING PHYSICAL ACTIVITY

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ENVIRONMENTAL TEMPERATURE OF AN ATHLETIC FIELD IN JAPAN AND COMPARISON BETWEEN WET BULB TEMPERATURE AND WBGT (WET BULB GLOBE TEMPERATURE)

) of the subjects, nine male baseball players of college age, was determined by maximal exercise tests on a cycle ergometer. The subjects practised baseball regularly without drinking fluids from 1330 to 1530 hours. After 30 min rest, they played a baseball game with free access to a sports drink at 15°C from 1600 to 1830 hours. At a mean ambient temperature of 36.7 (SEM 0.2)°C, the mean percentage of body mass loss (Δmb) and increase of oral temperature (ΔTo) from 1330 to 1530 hours was 3.47 (SEM 0.12)% and 0.81 (SEM 0.14)°C, respectively. The sweat loss from 1330 to 1830 hours was 56.53 (SEM 1.56)ml · kg−1 of body mass (Mb) while the mean fluid consumption was 44.78 (SEM 2.39)ml · kg−1 ofmb, with recovery of 76.08 (SEM 2.81)% of sweat loss. The

Attenuation of Urinary Sodium Excretion during Cold-Air Exposure in Trained Athletes

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EFFCTS OF VARYING SKIN TEMPERATURE DUE TO SEVERAL TYPES OF CLOTHIG ON TEMPERATURE RESPONSES AND HEAT-STRESS DURING EXERCISE

was significantly inversely correlated withΔmb, fluid intake and rehydration amount, but showed no correlation withΔTo. These results would suggest that at a given exercise intensity in subjects with a higher aerobic capacity body temperature is maintained with a lower sweating rate than that in subjects with a lower aerobic capacity.