Figure 2. Resting total body water (TBW), plasma volume (PV), red cell volume (RCV), extracellular fluid (ECF), interstitial fluid (ISF) and intracellular fluid (ICF) prior to, and during, a three-week heat acclimation regimen.

Values are means with standard errors of the means. Data in the upper panels are for 12 subjects, while lower panels are for 8 subjects. *Significantly different from Day 1 (P < 0.05).