Which of the following is considered a heat-related risk factor?

The correct answer identifies overweight or unfit individuals as a heat-related risk factor due to the physiological stress that excess body weight or lack of fitness can impose during heat exposure. Individuals who are overweight may struggle with thermoregulation, which is the body’s ability to maintain its core temperature. When exercising or engaging in activities in hot conditions, having excess mass can increase thermal stress, making it harder for the body to cool down effectively.

On the other hand, good physical fitness, being athletically conditioned, and having a balanced diet generally contribute to better heat tolerance and resilience. Fit individuals are more efficient at dissipating heat and have improved cardiovascular function, making them less susceptible to heat-related illnesses. A balanced diet supports overall health, including proper hydration and energy storage, which assists in maintaining optimum body function during heat exposure.