So sorry, yes I did, I was thinking of others like my 63 year old cousin who had a stroke. My mother had the same one at 70 and quit. Our brains are very resilient, called plasticity, and so are our bodies. Loved watching Jack Palance do his pushups and there is a 90+ year old yoga instructor who is also fun to watch.
Motivation is the key.
Well, I really didn’t think about motivation - to me it was more just plain stubbornness - which my family would tell you is a major trait for me. LOL