Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 52-62 |
| Number of pages | 11 |
| Journal | Autonomic Neuroscience: Basic and Clinical |
| Volume | 196 |
| DOIs | |
| Publication status | Published - 2016 |
| Externally published | Yes |
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Cardiovascular adaptations supporting human exercise-heat acclimation. / PERIARD, Julien; Travers, Gavin J S; Racinais, Sebastien; Sawka, M.N.
In: Autonomic Neuroscience: Basic and Clinical, Vol. 196, 2016, p. 52-62.Research output: Contribution to journal › Review article
TY - JOUR
T1 - Cardiovascular adaptations supporting human exercise-heat acclimation
AU - PERIARD, Julien
AU - Travers, Gavin J S
AU - Racinais, Sebastien
AU - Sawka, M.N.
PY - 2016
Y1 - 2016
N2 - This review examines the cardiovascular adaptations along with total body water and plasma volume adjustments that occur in parallel with improved heat loss responses during exercise-heat acclimation. The cardiovascular system is well recognized as an important contributor to exercise-heat acclimation that acts to minimize physiological strain, reduce the risk of serious heat illness and better sustain exercise capacity. The upright posture adopted by humans during most physical activities and the large skin surface area contribute to the circulatory and blood pressure regulation challenge of simultaneously supporting skeletal muscle blood flow and dissipating heat via increased skin blood flow and sweat secretion during exercise-heat stress. Although it was traditionally held that cardiac output increased during exercise-heat stress to primarily support elevated skin blood flow requirements, recent evidence suggests that temperature-sensitive mechanisms may also mediate an elevation in skeletal muscle blood flow. The cardiovascular adaptations supporting this challenge include an increase in total body water, plasma volume expansion, better sustainment and/or elevation of stroke volume, reduction in heart rate, improvement in ventricular filling and myocardial efficiency, and enhanced skin blood flow and sweating responses. The magnitude of these adaptations is variable and dependent on several factors such as exercise intensity, duration of exposure, frequency and total number of exposures, as well as the environmental conditions (i.e. dry or humid heat) in which acclimation occurs
AB - This review examines the cardiovascular adaptations along with total body water and plasma volume adjustments that occur in parallel with improved heat loss responses during exercise-heat acclimation. The cardiovascular system is well recognized as an important contributor to exercise-heat acclimation that acts to minimize physiological strain, reduce the risk of serious heat illness and better sustain exercise capacity. The upright posture adopted by humans during most physical activities and the large skin surface area contribute to the circulatory and blood pressure regulation challenge of simultaneously supporting skeletal muscle blood flow and dissipating heat via increased skin blood flow and sweat secretion during exercise-heat stress. Although it was traditionally held that cardiac output increased during exercise-heat stress to primarily support elevated skin blood flow requirements, recent evidence suggests that temperature-sensitive mechanisms may also mediate an elevation in skeletal muscle blood flow. The cardiovascular adaptations supporting this challenge include an increase in total body water, plasma volume expansion, better sustainment and/or elevation of stroke volume, reduction in heart rate, improvement in ventricular filling and myocardial efficiency, and enhanced skin blood flow and sweating responses. The magnitude of these adaptations is variable and dependent on several factors such as exercise intensity, duration of exposure, frequency and total number of exposures, as well as the environmental conditions (i.e. dry or humid heat) in which acclimation occurs
UR - https://www.scopus.com/inward/record.uri?eid=2-s2.0-84963877896&doi=10.1016%2fj.autneu.2016.02.002&partnerID=40&md5=afe59cd78d87cf9ade1549b121a97bcd
U2 - 10.1016/j.autneu.2016.02.002
DO - 10.1016/j.autneu.2016.02.002
M3 - Review article
VL - 196
SP - 52
EP - 62
JO - Journal of the Autonomic Nervous System
JF - Journal of the Autonomic Nervous System
SN - 1566-0702
ER -