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KMID : 0379220100300030793
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Journal of Korea Gerontological Society
2010 Volume.30 No. 3 p.793 ~ p.802
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Effect of Heat Stress of Extreme Heat Lever on Muscle function and Muscle Injury Markers in Elderly Women
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Park Sok
Lee Cheon-Ho
Back Seung-Ok
Shin Yong-Up
Kim Jung-Suk
Cho Young-Wung
Lee Young-Jun
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Abstract
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The purpose of this study was to examine the influence of extreme heat on muscle function and muscle injury marker in elderly women. The subjects of this study were eight post-menopausal elderly women without any metabolic disease. All eight subjects were asked to perform the knee joint isokinetic exercise using isokinetic equipment (cybex) in the laboratory and experimental temperature within laboratory was adjusted to two conditions: extreme heat temperature(33±0.5°C) and normal temperature(20±0.5°C) maintained in 50±3% humidity conditions. Each experimental exercise was monitored and analyzed the change of HSP70, LDH and CK. Muscular functions (peak torque, total work, percentage of peak torque body weight, fatigue index, average power and total work) were significant differences at exercise between temperatural conditions (p<.05). In extreme heat temperature, muscular injury markers (HSP70, LDH and CK) were increased, threfore resulted in significantly higher than normal temperature(p<.05). These results show that extreme heat temperature can decrease muscle function in elderly women.
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KEYWORD
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elderly women, heat stress, muscle function, muscle injury marker
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