Figure 2. Heat exchange parameters calculated during the experiment. Transfer of heat by the respiratory tract (A) and heat exchange by: radiation (B), convection (C) and sweat evaporation (D) in normotensive (n=8) and hypertensive (n=8) subjects at rest, during, and after physical exercise in a hot environment (38°C and 60% relative humidity). Data are reported as means±SD. *P<0.05 hypertensive compared to normotensive (unpaired t-test).