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ID 26001
file
title alternative
EFFECTS OF WATER INGESTION INTERVAL ON THERMOREGULATORY RESPONSES DURING EXERCISE IN A HOT, HUMID ENVIRONMENT
creator
Takatori, Tadashi
Komura, Takashi
subject
body temperature
evaporative sweat loss
water ingestion
prolonged exercise
NDC
Medical sciences
abstract
During exercise at high temperatures, body temperature increases, impairing exercise performance and resulting in heat illnesses. Water ingestion during exercise is a simple and practical strategy to prevent hyperthermia. In the present study, we examined the effects of water ingestion interval on thermoregulatory responses during exercise in a hot, humid environment (32℃, 80% relative humidity). Eight male university students performed a 60-min cycling exercise (60% of the maximal O_2 uptake) under four separate conditions; no drinking (ND), water ingestion (mineral water) at 5 (D5), 15 (D15), and 30 (D30) min intervals. The total volume of water ingestion (TWI) was identical during D5, D15, and D30, and equal to the amount of fluid lost in sweat during ND. TWI was divided equally by the number of drinking times in each experiment. During exercise, both rectal and mean skin temperature were lower in D5 than those in the other conditions (p<0.05). There was no significant difference in total sweat loss between the four conditions, however, evaporative sweat loss and sweat efficiency (evaporative sweat loss/total sweat loss) were significantly (p<0.05) higher in D5 than those in the other conditions. These results suggest that the shorter water ingestion interval increases evaporative sweating and attenuates higher body temperature during exercise in a hot, humid environment.
journal title
体力科学 : Japanese Journal of Physical Fitness and Sports Medicine
volume
Volume 51
issue
Issue 3
start page
317
end page
324
date of issued
2002-05-25
publisher
日本体力医学会
issn
0039-906X
ncid
language
jpn
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
日本体力医学会
本文データは学協会の許諾に基づきCiNiiから複製したものである
relation url
department
Graduate School of Integrated Arts and Sciences



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