What I have discovered through daily exercise is that one does not need to get feeble with old age. I feel as strong at age 81 as at age 50. And.....my balance is as good as it was at age 50. People over age 65 suffer bone fractures from falls. Exercise not only improves balance, it also strengthens bones.
But I very rarely see over 75 age people in gym.
I am in my mid 60’s and hit the gym 3x a week. Exercise keeps you going.