Heat acclimation: a protocol you can actually execute

Topic

Heat acclimation: a protocol you can actually execute

Summary

What this changes

• • Repeated exposure to exercise in heat can reduce physiological strain, but heat exposure is itself an additional stress.
• • A consensus describes repeated exposures over one to two weeks; the duration and intensity require individual planning.
• • Do not automatically add 30–60 minutes of heat after normal training or treat symptoms as evidence that the protocol is working.

Protocol

A practical starting point

• • Check the event conditions, current heat exposure and relevant medical history before planning a block.
• • Discuss additional heat training with a qualified practitioner when unfamiliar, medically complex or returning after heat illness.
• • Reduce the ordinary workout demand when adding heat; select an environment with cooling, fluids and an exit option.
• • Practise clothing, pacing and cooling choices without deliberately dehydrating yourself.
• • Stop exposure when unwell. Confusion, collapse or suspected heat stroke requires urgent help and cooling.

Fit

Who it may help, and who should be cautious

Limits

Limitations and uncertainty

• • Laboratory protocols do not automatically transfer to humidity, solar exposure, clothing or field logistics.
• • Acclimation does not remove heat-illness risk or make an aggressive race pace safe.
• • The evidence does not justify one extra exposure duration for every athlete.