Effects of Heat Acclimation and Acclimatisation on Maximal Aerobic Capacity Compared to Exercise Alone in Both Thermoneutral and Hot Environments: A Meta-Analysis and Meta-Regression.

HA can enhance [Formula: see text] adaptation in thermoneutral or hot environments, with or without control group consideration, by at least a small and up to a moderate-large amount, with the larger improvements occurring in the heat. Ambient heat, number of induction days and post-testing days can explain some of the changes in hot [Formula: see text] adaptation.