My grandma, at 84, hardly can walk. While doing calisthenics almost daily, i seen, dozens of times, ppl being like (after i just did 20 dips), coming next to the bars and : ,, I bet this is easy ! '' Aaaaand. Can't do a single one. Walks away in shame. Pretends that something hurts. Plays around to create a distraction. Friends looking at them like ,, .... Yeah... No shi... '' All ages. from ~16 to ~60. And he's killing it at 98. Damn. And those 72's. Another dimension. Just shows what our bodies can, if, well maintained.