The effects of a heat acclimation protocol in persons with spinal cord injury

Persons without spinal cord injury (SCI) physiologically acclimate between seven to fourteen consecutive days of exercise in the heat. Decreased resting and exercise core temperature, decreased heart rate, increased plasma volume and increased thermal comfort during exercise are changes consistent w...

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Veröffentlicht in:Journal of thermal biology 2016-12, Vol.62 (Pt A), p.56-62
Hauptverfasser: Trbovich, Michelle B., Kiratli, Jenny B., Price, Mike J.
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creator Trbovich, Michelle B.
Kiratli, Jenny B.
Price, Mike J.
description Persons without spinal cord injury (SCI) physiologically acclimate between seven to fourteen consecutive days of exercise in the heat. Decreased resting and exercise core temperature, decreased heart rate, increased plasma volume and increased thermal comfort during exercise are changes consistent with heat acclimation. Autonomic dysfunction after SCI impairs heat dissipation through sweating and vasodilation. The purpose of this study is to determine if seven consecutive days of exercise in the heat would result in physiologic changes consistent with heat acclimation in persons with SCI. Ten persons with SCI divided into two groups: tetraplegia (n=5) and paraplegia (n=5) exercised in 35°C using an arm ergometer at 50% Wpeak for 30min followed by 15min rest. This protocol was repeated over seven consecutive days. Heart rate (HR), skin temperature, aural temperature (Taur), rate of perceived exertion (RPE), rate of perceived thermal strain (RPTS), and plasma volume (PV) were measured throughout the protocol. There were no significant differences in resting Taur exercise Taur, mean skin temperature, HR, PV, RPE or RPTS over the 7 days for either the tetraplegic or paraplegic group. Participants with SCI did not demonstrate the ability to dissipate heat more efficiently over 7 days of exercise at 35°C. The lack of heat acclimation seen in persons with SCI has implications for the athlete and non-athlete alike. For the SCI athlete, inability to acclimate will impair performance and endurance especially in warm environments, compared to the person without SCI. For the SCI non-athlete, there is a greater risk of heat-related illness in warm environments that can negatively affect participation in outdoor activities and thus quality of life. •Aural temperature of persons with tetraplegia rises significantly higher than persons paraplegia during heat stress.•Tetraplegic and paraplegic persons have impaired perception of thermal strain during aural temperature elevation.•Resting aural temperature in persons with tetraplegia was significantly lower than persons with paraplegia.•Cooler forehead skin temperature in paraplegic persons may indicate a local adaptation to the heat stress.•Physiologic changes consistent with heat acclimation did not occur in spinal cord injured persons.
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Decreased resting and exercise core temperature, decreased heart rate, increased plasma volume and increased thermal comfort during exercise are changes consistent with heat acclimation. Autonomic dysfunction after SCI impairs heat dissipation through sweating and vasodilation. The purpose of this study is to determine if seven consecutive days of exercise in the heat would result in physiologic changes consistent with heat acclimation in persons with SCI. Ten persons with SCI divided into two groups: tetraplegia (n=5) and paraplegia (n=5) exercised in 35°C using an arm ergometer at 50% Wpeak for 30min followed by 15min rest. This protocol was repeated over seven consecutive days. Heart rate (HR), skin temperature, aural temperature (Taur), rate of perceived exertion (RPE), rate of perceived thermal strain (RPTS), and plasma volume (PV) were measured throughout the protocol. 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For the SCI non-athlete, there is a greater risk of heat-related illness in warm environments that can negatively affect participation in outdoor activities and thus quality of life. •Aural temperature of persons with tetraplegia rises significantly higher than persons paraplegia during heat stress.•Tetraplegic and paraplegic persons have impaired perception of thermal strain during aural temperature elevation.•Resting aural temperature in persons with tetraplegia was significantly lower than persons with paraplegia.•Cooler forehead skin temperature in paraplegic persons may indicate a local adaptation to the heat stress.•Physiologic changes consistent with heat acclimation did not occur in spinal cord injured persons.</abstract><cop>England</cop><pub>Elsevier Ltd</pub><pmid>27839550</pmid><doi>10.1016/j.jtherbio.2016.10.006</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record>
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subjects Acclimatization
Adult
Body Temperature
Body Temperature Regulation
Exercise
Exercise Test
Female
Heart Rate
Heat acclimation
Hot Temperature
Humans
Male
Middle Aged
Plasma Volume
Skin Temperature
Spinal Cord Injuries - physiopathology
Spinal cord injury
Thermal strain
Thermography
Thermoregulatory dysfunction
Young Adult
title The effects of a heat acclimation protocol in persons with spinal cord injury
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