This study is the first to examine the effects of short passive heat exposure on heat acclimation (HA). Unlike traditional protocols requiring prolonged heat exposure, this study tests whether a daily 5-minute whole-body immersions at 45°C water repeated over two weeks can trigger adaptive responses, offering a potentially more accessible and time-efficient method for heat acclimation. This study aims to investigate whether brief, repeated passive heat exposure can induce HA in both female and male participants. It evaluates changes across physiological, biological, and psychological markers to determine the efficacy of this minimal-exposure protocol. It is hypothesized that such short, repeated immersions may be sufficient to elicit significant adaptive responses across key HA indicators.
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Dehydration (kg)
Timeframe: From enrollment to the end of deacclimation (one month after the 14-day heat acclimation period).
Heart rate (bpm)
Timeframe: From enrollment to the end of deacclimation (one month after the 14-day heat acclimation period).
Blood pressure (mmHg)
Timeframe: From enrollment to the end of deacclimation (one month after the 14-day heat acclimation period).
Pulse pressure (mmHg)
Timeframe: From enrollment to the end of deacclimation (one month after the 14-day heat acclimation period).
Rate of pressure production (AU)
Timeframe: From enrollment to the end of deacclimation (one month after the 14-day heat acclimation period).
Shivering/sweating (points)
Timeframe: From enrollment to the end of deacclimation (one month after the 14-day heat acclimation period).
Thermal comfort (points)
Timeframe: From enrollment to the end of deacclimation (one month after the 14-day heat acclimation period).
Body temperature (°C)
Timeframe: From enrollment to the end of deacclimation (one month after the 14-day heat acclimation period).
Physiological strain index
Timeframe: From enrollment to the end of deacclimation (one month after the 14-day heat acclimation period).
Oxygen consumption (mL/min/kg)
Timeframe: From enrollment to the end of deacclimation (one month after the 14-day heat acclimation period).
Carbon dioxide output (mL/min/kg)
Timeframe: From enrollment to the end of deacclimation (one month after the 14-day heat acclimation period).
Carbon dioxide output (mL/min)
Timeframe: From enrollment to the end of deacclimation (one month after the 14-day heat acclimation period).
Oxygen consumption (mL/min)
Timeframe: From enrollment to the end of deacclimation (one month after the 14-day heat acclimation period).
Respiratory quotient
Timeframe: From enrollment to the end of deacclimation (one month after the 14-day heat acclimation period).
Ventilation (L/min)
Timeframe: From enrollment to the end of deacclimation (one month after the 14-day heat acclimation period).
Tidal volume (L)
Timeframe: From enrollment to the end of deacclimation (one month after the 14-day heat acclimation period).
Breathing frequency (t/min)
Timeframe: From enrollment to the end of deacclimation (one month after the 14-day heat acclimation period).