Document Detail

The effects of exercise intensity on thermoregulatory responses to exercise in women.
MedLine Citation:
PMID:  12126994     Owner:  NLM     Status:  MEDLINE    
We investigated the influence of altering exercise intensity (150, 300, and 450 kpm/min) on the resetting of the core temperature threshold for the onset of the sweating rate (M(sw)) and the alteration of sweating sensitivity during the menstrual cycle in women. Five women underwent cycling exercise for 30 min in both the luteal and follicular phases under controlled neutral environmental conditions (T: 25 degrees C, RH: 55%). A significantly higher rectal temperature (T(re)) was seen in the luteal phase at all exercise intensities, and the same time course of the T(re) response with a constant difference of approximately 0.2 degrees C was shown between the follicular phase and the luteal phase. The T(re) threshold for M(sw) was also apparently shifted rightward a constant value of 0.2 degrees C from the follicular phase to the luteal phase, independent of the alteration of exercise intensity. The slope of the M(sw)-T(re) relationship in the follicular phase did not differ from that in the luteal phase. These results indicate that (1) a rightward shift in the T(re) threshold from the follicular phase to the luteal phase can be observed independent of any alteration of the exercise intensity; and (2) the sensitivity of M(sw) is also not physiologically influenced by exercise intensity. Thus, alterative thermoregulation during the menstrual cycle was fundamentally unaffected by the change of exercise intensity.
Yoshiyuki Fukuoka; Yoshiko Kaneko; Chizuko Takita; Mayumi Hirakawa; Harumi Kagawa; Yasuto Nakamura
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Publication Detail:
Type:  Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Physiology & behavior     Volume:  76     ISSN:  0031-9384     ISO Abbreviation:  Physiol. Behav.     Publication Date:  2002 Aug 
Date Detail:
Created Date:  2002-07-19     Completed Date:  2003-02-13     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0151504     Medline TA:  Physiol Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  567-74     Citation Subset:  IM    
Faculty of Environmental and Symbiotic Science, Laboratory of Applied and Environmental Physiology, Prefectural University of Kumamoto, Kumamoto 862-8502, Japan.
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MeSH Terms
Body Temperature / physiology
Body Temperature Regulation / physiology*
Exercise / physiology*
Exercise Test
Follicular Phase / physiology
Heart Rate / physiology
Luteal Phase / physiology
Sweating / physiology

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