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How to integrate recovery during heat acclimation
  1. Mohammed Ihsan1,
  2. Julien D. Périard2,
  3. Sebastien Racinais1
  1. 1 Research and Scientific Support, Aspetar Orthopedic and Sports Medicine Hospital, Doha, Qatar
  2. 2 Research Institute for Sport and Exercise, University of Canberra, Canberra, Australian Capital Territory, Australia
  1. Correspondence to Dr Mohammed Ihsan, Research and Scientific Support, Aspetar Orthopedic and Sports Medicine Hospital, PO Box 29222, Doha, Qatar; Dr.Ihsan.M{at}

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The games of the XXXII Olympiad have been announced from 23 July to 8 August 2021, coinciding with the height of the Japanese summer. Heat acclimation/acclimatisation (HA) is the most important countermeasure athletes can adopt to safeguard their health and performance when competing in the heat. However, it is important for practitioners to recognise that repeated daily exposures to heat stress is a physiologically demanding endeavour. Prolonged heat exposure is characterised by increased thermal and cardiovascular strain, augmented glycogen utilisation and fluid losses, increased hormonal responses (ie, increased cortisol and catecholamine secretion), cytokinaemia and endotoxaemia, which may result in sleep and gastrointestinal disturbances, augmented lethargy and delayed physical recovery.1–3 For instance, consecutive days of training in the heat, particularly at high exercise intensities, can result in a state of over-reaching, despite signs of successful heat adaptation.4 It is therefore imperative to manage recovery when training in the heat, as accumulated fatigue may impact on the overall success of the HA programme, as well as interfere with the quality of other training sessions. This editorial aims to provide practitioners and coaches with an up-to-date synopsis of recovery strategies during HA (figure 1).

Figure 1

Schematic illustration on the responses to repeated training in the heat and recovery strategies.

Pre-exercise nutritional strategies are crucial in limiting fluid and electrolyte imbalance during exertional heat stress, such that HA sessions can be optimally …

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  • Contributors All authors wrote this editorial. All authors approved the final version of this manuscript.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Patient consent for publication Not required.

  • Provenance and peer review Not commissioned; externally peer reviewed.