Final answer:
The a) duration of exercise has the greatest impact on relative hormonal response during exercise.
Step-by-step explanation:
The greatest impact on relative hormonal response during exercise is the duration of exercise. The longer the duration of exercise, the greater the hormonal response. For example, studies have shown that prolonged endurance exercise can lead to an increase in hormones such as cortisol and growth hormone.
Other factors such as the time of day, ambient temperature, and dietary intake can also have an impact on hormonal response, but the duration of exercise has been found to have the greatest influence.
For instance, research has shown that exercise duration affects the release of hormones such as cortisol, which is involved in stress response, and growth hormone, which is important for tissue repair and growth.