<prompt> McArdles Maximum Allowable sweat rate:-4.5 litre4 hours3.0 litre4 hours3.5 litre4 hours5.0 litre4 hours  <response>: McArdles Index: - It is an index of thermal comfo. Max P4SR Predictable 4 hour sweat rate: 4.5lit4hours. Beyond this death of person is imminent. 