Humans turn on the stress response for purely psychological reasons, and we are doing it nonstop. We are bombarding our bodies with stress to such a point that the stress response becomes more damaging than the stressor in the first place.
To anyone who is already reconsidering commitments related to diet, exercise, work, family time or "me" time, don't give up and certainly don't stress over them; you simply have to find that sweet spot somewhere between ambition and the impossible.
Life issues that we are all subject to are stressors for some but not for others. The difference lies in our response, for although we may have little or no control over the circumstances we are dealing with, we do have control over our reaction to them.