ENHANCED GLYCOLYTIC METABOLISM AND SKELETAL MUSCLE HYPOXIA DURING SUB-MAXIMUM EXERCISE IN COLD WATER ENVIRONMENT

In this study, we examined the effects of lactate threshold bicycle exercise in cold water with lower muscle temperature on skeletal muscle oxygenation and glycolytic metabolism. Eight subjects in each water temperature condition (15 and 33°C) conducted 30-min lower-body water immersion followed by...

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Bibliographic Details
Published inJapanese Journal of Physiological Anthropology Vol. 28; no. 3; pp. 57 - 69
Main Authors SAKAUE, Hiroyuki, WAKABAYASHI, Hitoshi, SENGOKU, Yasuo, TAKAGI, Hideki, NABEKURA, Yoshiharu
Format Journal Article
LanguageJapanese
Published Japan Society of Physiological Anthropology 25.08.2023
Subjects
Cold water environment
Fast twitch fibers
Glycolytic metabolism
Muscle temperature
Tissue hypoxia
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Summary:In this study, we examined the effects of lactate threshold bicycle exercise in cold water with lower muscle temperature on skeletal muscle oxygenation and glycolytic metabolism. Eight subjects in each water temperature condition (15 and 33°C) conducted 30-min lower-body water immersion followed by 30-min underwater bicycle exercise. As a result, tissue hypoxia was observed in the skeletal muscle oxygenation during the exercise performed with decreased muscle temperature, and significantly higher blood lactate concentration and respiratory exchange ratio would indicate an increase in glycolytic metabolism.
ISSN:1342-3215
2432-0986
DOI:10.20718/jjpa.28.3_57