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Hydration and thermal strain during tennis in the heat
  1. Michael F Bergeron
  1. Department of Pediatrics, Sanford USD School of Medicine, National Youth Sports Health & Safety Institute, Sioux Falls, South Dakota, USA
  1. Correspondence to Dr Michael F Bergeron, Department of Pediatrics, National Youth Sports Health & Safety Institute, Sanford USD Medical Center 1210 W 18th Street, Suite 204, Sioux Falls, SD 57104, USA; michael.bergeron{at}


Competitive tennis in the heat can prompt substantial sweat losses and extensive consequent body water and electrolyte deficits, as well as a level of thermal strain that considerably challenges a player's physiology, perception of effort, and on-court well-being and performance. Adequate hydration and optimal performance can be notably difficult to maintain when multiple same-day matches are played on successive days in hot weather. Despite the recognised effects of the heat, much more research needs to be carried out to better appreciate the broader scope and full extent of the physiological demands and hydration and thermal strain challenges facing junior and adult players in various environments, venues and competition scenarios. However, certain recommendations of best practices should be emphasised to minimise exertional heat illness risk and improve player safety, well-being and on-court performance.

  • Thermoregulation
  • Fluid balance
  • Children's health and exercise
  • Dehydration
  • Elite performance

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