McArdle's Maximum Allowable Sweat Rate
- McArdle and his associates suggested that 4.5 litres in 4 hours is the maximum allowable sweat rate which is compatible with normal physiological reaction in a healthy young adult male
- They also prepared a chart for obtaining the ‘Predicted 4 hour sweat rate’ – P4SR – from any combination of
- dry bulb temperature
- wet bulb temperature
- radiant heat
- air movements
- P4SR value of 3 is considered the upper limit of comfort level
