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Int J Sports Med 2013; 34(08): 707-711
DOI: 10.1055/s-0032-1331770
Physiology & Biochemistry
© Georg Thieme Verlag KG Stuttgart · New York

Effects of Rain on Energy Metabolism while Running in a Cold Environment

R. Ito
1   Department of Economics, Nihon Fukushi University, Chita-gun, Japan
,
M. Nakano
2   Department of Human Health, Aichi Toho University, Toyota, Japan
,
M. Yamane
3   Human Sciences, Aichi Mizuho College, Toyota, Japan
,
M. Amano
4   Faculty of Human Wellness, Tokai Gakuen University, Miyoshi, Japan
,
T. Matsumoto
5   Laboratory for Exercise Physiology and Biomechanics, Graduate School of Health and Sport Sciences, Chukyo University, Toyota, Japan
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accepted after revision 03. Dezember 2012

Publikationsdatum:
31. Januar 2013 (online)

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Abstract

Environmental factors tend to influence the performance of individuals who exercise for extended periods. The present study aimed to determine energy metabolism while running in cold, wet conditions using a climatic chamber that can precisely simulate rainy conditions. 7 healthy men (age, 23.3±2.9 (SD) y; height, 168.6±7.5 cm; weight, 65.9±8.1 kg; V. O2max, 52.0±5.7 mL·kg − 1·min − 1) ran on a treadmill at 70% ˙VO2max intensity for 30 min in a climatic chamber at an ambient temperature of 5°C in the presence (RAIN) or absence (CON) of 40 mm/h of precipitation. Expired air, esophageal temperature, heart rate, mean skin temperature, rating of perceived exertion and blood samples were measured. Esophageal temperature and mean skin temperature were significantly lower (P<0.05) in RAIN than in CON all. Minute ventilation, oxygen consumption and levels of plasma lactate and norepinephrine were significantly higher (P<0.05) in RAIN than in CON. In conclusion, the higher oxygen consumption and plasma lactate in RAIN indicated that energy demand increases when running in cold conditions.

Key words

weather - climatic chamber - oxygen consumption - lactate - thermoregulatory
 

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