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  • Quantifying exercise heat acclimatisation in athletes and military personnel : a systematic review and meta-analysis
    Brown, Harry A., (medicina športa) ...
    Athletes and military personnel are often expected to compete and work in hot and/or humid environments, where decrements in performance and an increased risk of exertional heat illness are ... prevalent. A physiological strategy for reducing the adverse efects of heat stress is to acclimatise to the heat. Objective The aim of this systematic review was to quantify the efects of relocating to a hotter climate to undergo heat acclimatisation in athletes and military personnel. Eligibility Criteria Studies investigating the efects of heat acclimatisation in non-acclimatised athletes and military personnel via relocation to a hot climate for<6 weeks were included. Data Sources MEDLINE, SPORTDiscus, CINAHL Plus with Full Text and Scopus were searched from inception to June 2022. Risk of Bias A modifed version of the McMaster critical review form was utilised independently by two authors to assess the risk of bias. Data Synthesis A Bayesian multi-level meta-analysis was conducted on fve outcome measures, including resting core temperature and heart rate, the change in core temperature and heart rate during a heat response test and sweat rate. Wetbulb globe temperature (WBGT), daily training duration and protocol length were used as predictor variables. Along with posterior means and 90% credible intervals (CrI), the probability of direction (Pd) was calculated. Results Eighteen articles from twelve independent studies were included. Fourteen articles (nine studies) provided data for the meta-analyses. Whilst accounting for WBGT, daily training duration and protocol length, population estimates indicated a reduction in resting core temperature and heart rate of−0.19 °C [90% CrI:−0.41 to 0.05, Pd=91%] and−6 beats·min−1 [90% CrI:−16 to 5, Pd=83%], respectively. Furthermore, the rise in core temperature and heart rate during a heat response test were attenuated by−0.24 °C [90% CrI:−0.67 to 0.20, Pd=85%] and−7 beats·min−1 [90% CrI:−18 to 4, Pd=87%]. Changes in sweat rate were conficting (0.01 L·h−1 [90% CrI:−0.38 to 0.40, Pd=53%]), primarily due to two studies demonstrating a reduction in sweat rate following heat acclimatisation. Conclusions Data from athletes and military personnel relocating to a hotter climate were consistent with a reduction in resting core temperature and heart rate, in addition to an attenuated rise in core temperature and heart rate during an exercisebased heat response test. An increase in sweat rate is also attainable, with the extent of these adaptations dependent on WBGT, daily training duration and protocol length.
    Vir: Sports medicine [Elektronski vir]. - ISSN 1179-2035 (Vol. 54, 2023, str. 727–741)
    Vrsta gradiva - članek, sestavni del ; neleposlovje za odrasle
    Leto - 2023
    Jezik - angleški
    COBISS.SI-ID - 202144259

    Povezava(-e):

    https://link.springer.com/article/10.1007/s40279-023-01972-4
    DOI

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