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. 2017 Nov 11;48(2):409–430. doi: 10.1007/s40279-017-0808-x
Five or more heat acclimation (HA) days induce stable adaptations in end-exercise heart rate and core temperature (T c), but for every day without heat exposure (i.e., decay day) ~ 2.5% of these adaptations are lost.
Extending daily heat exposure duration improves adaptations in T c.
For sweat rate, longer HA periods are related to more sustainable adaptations.