I'll start off by stating that I disagree with you whole-heartily about the benefits (or dangers) of lifting heavy weights -- that is when done correctly and wi

I'll start off by stating that I disagree with you whole-heartily about the benefits (or dangers) of lifting heavy weights -- that is when done correctly and with a full range-of-motion. I think your 3 point philosophy for life-long health is dead-on but I think the second point "move your body through space, sometimes with volume, sometimes with intensity" is too abstract and certainly open to interpretation. Does the hour of pickup soccer I played last night count? (A pretty intense hour of sprinting) To me, yes. To others maybe walking the dog with a brief jog to the door from the end of the driveway is as intense as it gets. I would argue that "walking the dog" doesn't cut it if that is your "sometimes with intensity" definition. Every person needs to squat and deadlift heavy things from time to time. And that does not need to happen in a gym -- a good sized rock suffices. Doing so will help with mobility, bone density, strength and balance. And if those movements cause injury then they need to fix the disfuctions that aren't allowing proper movement. Not addressing those issues will lead to hip, should and back problems down the line whether they lift or not.