Exercise Heat Stress and Fatigue

Previous research has demonstrated that the human body seems to have a "cut-off" point at which exercise in a hot environment is no longer possible. This is thought to be a core temperature of ~40˚C. However, other research as suggested that exercise intensity is reduced "in anticipation" of catastrophic elevations in the core temperature through some physiological mechanism that has not yet been identified.

Research studies in the Thermal Ergonomics Laboratory are currently under way attempting to identify whether indeed such an anticipatory reduction in exercise intensity actually occurs during prolonged exercise in the heat, and if it does what mechanism is responsible.