The older you are and the more years of sedentary life you have lived, the more you need to moderate whatever athletic pursuit you attempt. I also highly recomm

The older you are and the more years of sedentary life you have lived, the more you need to moderate whatever athletic pursuit you attempt. I also highly recommend combining any strength or aerobic activity with joint mobility work (stretching, yoga, etc). I say these because of my own experiences with failing to follow those rules and suffering physically debilitating consequences as a result. I used to ride 100s of miles a week and now can barely ride and hour. Weight lifting is no longer a matter of how much can my muscles lift, but rather how much can my shitty joints take before they get injured.