I am the oldest of four. In descending order, Highriser, ABI Brother, Tradie Brother, Sister. I am the least fittest of my siblings. While I did play badminton for a year or so with a friend in my late teens, that was the extent of my sporting achievements. If any other sort of ball came in my direction, I would run away. The ball was not there for me to catch or hit. It was there to hit me and it will hurt.
Tradie Brother's two daughters and son all have sporting injuries that are already causing them problems.
Given I am the oldest of my siblings, I should have joint pains, a bad back and a hurting knee. I have none of these, yet my high sport achieving siblings all have issues with joints and muscles and these are not improving as they get older.
My advice to someone young to ensure good health in older age?
Don't play sport. It will damage your body.
Walk a lot, don't run.