What he refuses to grasp - any of us, even a grandma or near crippled 75 yo man, could do his workouts without blinking an eye or breaking a sweat. He however, would die and be in the hospital within 15 minutes if he tried anything we do.
Ummmm...Well I am close to the second example, LOL! I am not yet allowed (again) to train with weights. The last time I could do squats was well over a decade ago and I was even then, older than he is now. I did multiple sets of 20 reps with 300lbs to 400lbs. I used stands made by my late brother and a pair of sawhorses in the event I could not complete a rep. My best leg extension at home was 225lbs. for one set of 100 reps. That was hard, almost as hard as my 100 rep squat with 225lbs in the mid '80s. I was shaking on that one, LOL!
Those days are long gone and yes, I have difficulty with but continue to accept that reality, but as Lone Watie would say, I endeavor to persevere!