NIOSHTIC-2 Publications Search

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

Gerhart HD; Seo Y; Vaughan J; Followay B; Barkley JE; Quinn T; Kim J-H; Glickman EL

Eur J Appl Physiol 2019 Jul; 119(7):1547-1556

https://doi.org/10.1007/s00421-019-04144-3

20055822

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 degrees C water for 15 min. Minimum finger temperature (Tmin), maximum finger temperature (Tmax), onset time, amplitude, and peak time were measured before and after exercise under normoxia (21% O2) and two levels of normobaric hypoxia (17% O2 and 13% O2). Results: Neither Tmin nor amplitude was affected by hypoxia. However, Tmax was significantly decreased by hypoxia while reduction in onset time and peak time trended towards significance. Tmin, Tmax, 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.

Hypoxia; Pathology; Humans; Body temperature; Blood vessels; Blood pressure; Body regions; Oxygen levels; Oxygen deprivation; Cold adaptation; Cold environments; Physical exercise; Metabolic effects; Metabolic rate; Heat production; Amplitude; Physiological response; Physiological effects; Author Keywords: Body temperature; Cold-induced vasodilation; Exercise; Normobaric hypoxia

Yongsuk Seo, Environmental Physiology Laboratory, Kent State University, Kent, OH, USA

EJAPFN

7782-44-7

20190701

Journal Article

yseo@kent.edu

2019

7

1439-6319

NPPTL

European Journal of Applied Physiology

PA; OH; MN; WI