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Oliver R. Barley, Dale W. Chapman, Georgios Mavropalias, and Chris R. Abbiss

) may impact competitive performance by impairing repeat-effort capacities, 7 combat sports–specific performance, 9 – 11 and muscular performance 8 , 12 – 13 following recovery periods of 3 to 5 hours and in some cases up to 24 hours. 7 Heat acclimation has been shown to mitigate the negative

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Matthew Zimmermann, Grant Landers, Karen Wallman, and Georgina Kent

dehydration. 2 , 3 Because of this, methods of improving endurance performance in the heat have been developed. Heat acclimation (artificial environment) or heat acclimatization (natural environment) occurs when an individual trains in hot and typically humid environmental conditions for ∼60–90 minutes each

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Yasuki Sekiguchi, Erica M. Filep, Courteney L. Benjamin, Douglas J. Casa, and Lindsay J. DiStefano

Clinical Scenario Exercise in the heat can lead to performance decrements and increase the risk of heat illness. 1 , 2 Heat acclimation refers to the systematic and gradual increase in exercise in a controlled, laboratory environment with hot environmental conditions and is an impactful strategy

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Samuel T. Tebeck, Jonathan D. Buckley, Clint R. Bellenger, and Jamie Stanley

Short-term heat acclimation (STHA) involves repeated exposure to heat stress over the course of ∼7 days in an artificial (acclimation) or natural (acclimatization) environment. 1 STHA has received increasing interest for elite athletic preparation because it efficiently and effectively promotes

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Cyril Schmit, Rob Duffield, Christophe Hausswirth, Jeanick Brisswalter, and Yann Le Meur

Heat acclimation (HA) has the capability to improve performance in the heat, potentially countering heat-induced performance decrements. 1 In general, HA is accomplished via regular exercise at submaximal intensities in environments of sufficient temperature. 2 , 3 In addition, due to the

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Michael J. Zurawlew, Jessica A. Mee, and Neil P. Walsh

Prior to exercise-heat stress, athletes and military personnel are advised to complete a period of heat acclimation to alleviate heat strain and improve exercise capacity in the heat. 1 The adaptive responses that improve exercise capacity in the heat include an earlier onset and an increase in

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Yasuki Sekiguchi, Courteney L. Benjamin, Samantha O. Dion, Ciara N. Manning, Jeb F. Struder, Erin E. Dierickx, Margaret C. Morrissey, Erica M. Filep, and Douglas J. Casa

importance as typically those undertaking heat acclimation (HA) tend to be preparing for prolonged events with high sweat rates. In addition to hydration, HA is also an impactful strategy to mitigate negative effects of exercise in the heat ( Alhadad et al., 2019 ). HA refers to the process of multiple

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Thomas Reeve, Ralph Gordon, Paul B. Laursen, Jason K.W. Lee, and Christopher J. Tyler

Exercise performance in the heat is often impaired due to the greater physiological strain experienced, 1 – 3 but heat acclimation/acclimatization (HA) can reduce this impairment by inducing a number of beneficial physiological (eg, reduction in cardiovascular strain, lower core body temperature

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Erin L. McCleave, Katie M. Slattery, Rob Duffield, Stephen Crowcroft, Chris R. Abbiss, Lee K. Wallace, and Aaron J. Coutts

acclimation in hot and temperate environments by 8% and 6%, respectively, along with improved power at lactate threshold, maximal cardiac output, and PV expansion. Despite promising results surrounding the transfer of heat adaptations to performance, 5 not all studies have reported improvements in temperate

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David N. Borg, Ian B. Stewart, John O. Osborne, Christopher Drovandi, Joseph T. Costello, Jamie Stanley, and Geoffrey M. Minett

variable. Consistent with some short-term heat-training interventions, 1 there was little evidence that 5 days of cycling in 35°C (50% RH) induced acclimation (Figure  2 ; Table  2 ). As expected, cycling in the heat increased the TL response compared with the temperate environment (Figures  1 and 2