Change and Loss are two facts of life. Some are minor and easily forgotten others can be character shaping or damaging. Early experiences have an undoubted effect on our later life but unless we can learn to adapt to the idea that change doesn’t need to be entirely negative and can even lead to gains.
Exercise. I think there are plenty of reasons to wax lyrical about exercise and it’s not because I’m an avid exerciser. I take no formal exercise in the sense that I’m not a member of a gym, I don’t have a personal trainer and I don’t own exercise equipment, unless you count the bicycle that I ride from time to time.