A comparison of hydration effect on body fluid and temperature regulation between Malaysian and Japanese males exercising at mild dehydration in humid heat

This study investigated the effect of hydration differences on body fluid and temperature regulation between tropical and temperate indigenes exercising in the heat. Ten Japanese and ten Malaysian males with matched physical characteristics (height, body weight, and peak oxygen consumption) particip...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physiological anthropology 2014-02, Vol.33 (1), p.5-5, Article 5
Main Authors: Wakabayashi, Hitoshi, Wijayanto, Titis, Lee, Joo-Young, Hashiguchi, Nobuko, Saat, Mohamed, Tochihara, Yutaka
Format: Article
Language:English
Subjects:
Adult
Asian People - statistics & numerical data
Body Fluids - physiology
Body Temperature Regulation - physiology
Dehydration - epidemiology
Dehydration - physiopathology
Exercise - physiology
Hot Temperature
Humans
Humidity
Japan
Malaysia
Male
Original
Sodium - blood
Thirst - physiology
Young Adult
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This study investigated the effect of hydration differences on body fluid and temperature regulation between tropical and temperate indigenes exercising in the heat. Ten Japanese and ten Malaysian males with matched physical characteristics (height, body weight, and peak oxygen consumption) participated in this study. Participants performed exercise for 60 min at 55% peak oxygen uptake followed by a 30-min recovery at 32°C and 70% relative air humidity with hydration (4 times each, 3 mL per kg body weight, 37°C) or without hydration. Rectal temperature, skin temperature, heart rate, skin blood flow, and blood pressure were measured continuously. The percentage of body weight loss and total sweat loss were calculated from body weight measurements. The percentage change in plasma volume was estimated from hemoglobin concentration and hematocrit. Malaysian participants had a significantly lower rectal temperature, a smaller reduction in plasma volume, and a lower heart rate in the hydrated condition than in the non-hydrated condition at the end of exercise (P
ISSN:1880-6805
1880-6791
1880-6805
DOI:10.1186/1880-6805-33-5