[shemp]

It is your want to define the person and differentiate their needs in the way you suggest that is the issue. The need to stand up and sit down correctly is at least as urgent for an 80 year old as a 20 year old. But stipulating that this is inappropriate for the 80 year old(or even most trainees), that observation doesn't belong in a conversation about the 20 year old(or the other trainees)-- except as an excuse for why the industry doesn't serve it's charges.

I've seen plenty of healthy folks, some doing sophisticated/demanding agility drills and stability ball stuff-- never doing major lifts.

I've seen plenty of other folks-- never doing progressions towards a squat or lift.