Sports Sciences Commons^™

Effect Of Fluid Temperature And Volume On Thermoregulation In The Heat, Michelle M. Johannsen

Graduate Student Theses, Dissertations, & Professional Papers

The link between thermoregulation, hydration status, and exercise performance in hot humid environments is controversial. The purpose of this study was to evaluate the effects of volume and temperature of ingested fluid on hydration status, thermoregulation and exercise performance. Recreationally active males (N=11, 24.7±5.9 years; VO₂max=58.2±6.0 mL/kg/min) completed two 3-hour intermittent exercise trials in the heat (31^o WBGT=35.5°C with 50% humidity). Participants consumed either 1 mL/kg body weight (BW) of room temperature water (35.5°C; ROOM) or 0.5 mL/kg of an ice slurry mixture (~0°C; COLD) every ten minutes throughout the trials in a randomized crossover design. Subjects …