What is an example of a physiological stressor?

An example of a physiological stressor is intense physical exercise, which can elevate heart rate, increase oxygen demand, and trigger the release of stress hormones like cortisol and adrenaline. Other examples include illness, injury, or extreme temperatures, which can challenge the body's homeostasis and require adaptive responses to maintain balance. These stressors can lead to both short-term and long-term physiological changes in the body.