Cold-induced vasodilation responses before and after exercise in normobaric normoxia and hypoxia

Purpose Cold-induced vasodilation (CIVD) is known to protect humans against local cold injuries and improve manual dexterity. The current study examined the effects of metabolic heat production on cold-induced vasodilation responses in normobaric hypoxia and normoxia. Methods Ten participants immers...

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Bibliographic Details
Published in:European journal of applied physiology 2019-07, Vol.119 (7), p.1547-1556
Main Authors: Gerhart, Hayden D., Seo, Yongsuk, Vaughan, Jeremiah, Followay, Brittany, Barkley, Jacob E., Quinn, Tyler, Kim, Jung-Hyun, Glickman, Ellen L.
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Biomedicine
Cold
Human Physiology
Hypoxia
Metabolism
Occupational Medicine/Industrial Medicine
Original Article
Sports Medicine
Vasodilation
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Summary:Purpose Cold-induced vasodilation (CIVD) is known to protect humans against local cold injuries and improve manual dexterity. The current study examined the effects of metabolic heat production on cold-induced vasodilation responses in normobaric hypoxia and normoxia. Methods Ten participants immersed their non-dominant hand into 5 °C water for 15 min. Minimum finger temperature ( T min ), maximum finger temperature ( T max ), onset time, amplitude, and peak time were measured before and after exercise under normoxia (21% O 2 ) and two levels of normobaric hypoxia (17% O 2 and 13% O 2 ). Results Neither T min nor amplitude was affected by hypoxia. However, T max was significantly decreased by hypoxia while reduction in onset time and peak time trended towards significance. T min , T max, and amplitude were significantly higher during post-exercise CIVD than pre-exercise CIVD. Conclusion The CIVD response may be negatively affected by the introduction of hypoxia whereas metabolic heat production via exercise may counteract adverse effects of hypoxia and improve CIVD responses.
ISSN:1439-6319
1439-6327
DOI:10.1007/s00421-019-04144-3