What increase in workload should be observed during a rapid change to excessively hot conditions?

In situations where there is a rapid change to excessively hot conditions, physiological responses in the body demand more effort to maintain homeostasis, which significantly affects workload. Research indicates that human bodies must work harder to cool down through mechanisms like sweating and increased heart rate in high temperatures.

Typically, the increase in workload can be substantial, often being quantified as around 60% or more by the second day of exposure to such heat. This increase is due to the cumulative effects of heat stress, which encompasses hydration levels, cardiovascular strain, and overall energy expenditure in adapting to a hot environment.

Therefore, the choice indicating a 60% increase on the second day correctly reflects the intensity of workload that is expected during rapid transitions into excessively hot conditions, emphasizing the need for proper hydration, rest, and acclimatization strategies to mitigate health risks associated with heat exposure.