The Effects of High-Intensity Interval Training and Moderate-Intensity Continuous Training for Heat Acclimation on Resting Thermoregulation and Heart Rate Variability

The data consist of resting heart rate varibility, heart rate, skin temperature and core temperature in hot temperature conditions (32°C, 40% RH) or normal temperature conditions (23°C, 40% RH) before and after a 5days MICT or HIIT intervention.
This study examined the effects of high-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) during a 5-day heat acclimatization protocol (HA) on resting thermoregulation and heart rate variability (HRV).Forty-eight male university students participated in this study.Participants with maximal aerobic power (Pmax) and training experience were divided into four groups using an online randomizer: MICT in normal ambient temperatures (N-MICT), MICT in hot ambient temperatures (H-MICT), HIIT in normal ambient temperatures (N-HIIT), and HIIT in hot ambient temperatures (H-HIIT). In this study, we found that A 5-day HIIT HA leads to more physiological adaptations compared to MICT HA, suggesting that HIIT HA may be a valuable preventive approach for heat stroke prevention.