Whole-Body Heat Exchange during Heat Acclimation and Its Decay

Poirier, Martin P.; Gagnon, Daniel; Friesen, Brian J.; Hardcastle, Stephen G.; Kenny, Glen P.

doi:10.1249/mss.0000000000000401

Cited by 63 publications

(68 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…While exercising or physically active within the heat, systemic metabolic heat production ( prod ) is typically balanced by heat dissipation though enlarged skin blood flow. This process consequently increases skin temperature and augments sweating, which ultimately facilitates evaporation (Poirier et al, 2015). Reductions in self-paced exercise or fixed intensity military tasks, are a result of physiological strain and, or behavioural thermoregulation during heat stress (Sawka et al, 2011;Racinais et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

The effects of single versus twice daily short term heat acclimation on heat strain and 3000m running performance in hot, humid conditions

Willmott

Gibson

Hayes

et al. 2016

Journal of Thermal Biology

View full text Add to dashboard Cite

The effects of single versus twice daily short term heat acclimation on heat strain and 3000m running performance in hot, humid conditions, Journal of Thermal Biology, http://dx.doi.org/10. 1016/j.jtherbio.2016.01.001 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting galley proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. .min -1 2peak , once daily for 4d (SDHA) and twice daily for 2d (TDHA), in 35°C, 60% relative humidity (RH), and once daily for 4d (CON) in 21°C, 40% RH. Participants completed a pre-and post-intervention 5 km treadmill run trial in 30°C, 60% RH, where the first 2 2peak and the final 3 km was selfpaced.No statistically significant interaction effects occurred within-or between-groups over the 2-4d intervention. While within-group differences were found in physiological and perceptual measures during the fixed intensity trial post-intervention, they did not statistically differ between-groups. Similarly, TDHA (-36±34s [+3.5%]) and SDHA (-26±28s [+2.8%]) groups improved 3 km performances (p=0.35), but did not differ from CON (-6±44s [+0.6%]). This is the first study to investigate the effects of HA twice daily and compare it with traditional single session per day STHA. These STHA protocols may have the ability to induce partial adaptive responses to heat stress and possibly enhance performance in environmentally challenging conditions, however, future development is warranted to optimise the administration to provide a potent stimuli for heat adaptation in athletic and military personnel within a rapid regime.

show abstract

Section: Introductionmentioning

confidence: 99%

The effects of single versus twice daily short term heat acclimation on heat strain and 3000m running performance in hot, humid conditions

Willmott

Gibson

Hayes

et al. 2016

Journal of Thermal Biology

View full text Add to dashboard Cite

show abstract

“…STHA is a preferred regime as it provides less disruption of quality training prior to competition. Approximately 70% of adaptations have been demonstrated to occur following STHA, evidenced by reductions in thermoregulatory and cardiovascular strain combined with an improved sudomotor function (Poirier et al., ). Acknowledging previous observations that males typically have a superior sudomotor function compared with females (Inoue et al., ; Gagnon & Kenny, ), we may expect females to achieve superior sudomotor adaptation following STHA compared with males.…”

mentioning

confidence: 99%

A comparison of males and females' temporal patterning to short‐ and long‐term heat acclimation

Mee

Gibson

Doust

et al. 2015

Scandinavian Med Sci Sports

View full text Add to dashboard Cite

The current study assessed sex differences in thermoregulatory and physiological adaptation to short-term (STHA) and long-term heat acclimation (LTHA). Sixteen (eight males; eight females) participants performed three running heat tolerance tests ( Males and females responded to STHA; however, females required LTHA to establish thermoregulatory and cardiovascular stability. HA protocols should be designed to target sex differences in thermoregulation for optimal adaptation.

show abstract

“…We recently used direct calorimetry to quantify wholebody heat loss enhancement during heat acclimation, as well as the decay in these improvements after the end of heat acclimation [Poirier et al (2014)]. In light of the above unresolved questions, our objective in this paper was to evaluate the changes in HrV observed during the induction (14 days) and decay (14 days) of heat acclimation.…”

mentioning

confidence: 99%

Changes in heart rate variability during the induction and decay of heat acclimation

et al. 2014

Self Cite

View full text Add to dashboard Cite

show abstract

Whole-Body Heat Exchange during Heat Acclimation and Its Decay

Abstract: This is the first study to quantify how much 14 d of heat acclimation can increase whole-body evaporative heat loss, which can improve by as much as approximately 11%.

Cited by 63 publications

References 28 publications

The effects of single versus twice daily short term heat acclimation on heat strain and 3000m running performance in hot, humid conditions

The effects of single versus twice daily short term heat acclimation on heat strain and 3000m running performance in hot, humid conditions

A comparison of males and females' temporal patterning to short‐ and long‐term heat acclimation

Changes in heart rate variability during the induction and decay of heat acclimation

Contact Info

Product

Resources

About