Which adaptation occurs in athletes who regularly train in hot environments?

Easier thermoregulation is a key adaptation for athletes who regularly train in hot environments. When athletes train in heat, their bodies undergo physiological changes that improve their ability to maintain core temperature and manage heat stress. These adaptations may include improved sweating efficiency, which allows for better cooling through evaporation, and alterations in blood flow patterns to optimize heat dissipation from the core to the skin.

Additionally, acclimatization to heat can lead to a lower heart rate during exercise, reduced perceived exertion, and an overall enhanced capability to tolerate higher internal temperatures. These changes collectively support the athlete's performance and safety in hot conditions, making easier thermoregulation a vital physiological response to regular training in elevated temperatures.