Stefan MolyneuxVerified account

Many blue zone people seem to have "natural" exercise like living in the mountains and walking up and down in their daily endeavors.

studies have shown benefits of exercise again and again and again; it's only a question of finding joint-sparing exercise. Maybe swimming. Maybe upper body exercise that doesn't overload the knees.

No paradox at all. Too much of anything is bad. Whether excessive sedentariness or exercise. Thus moderate exercise is optimal for both health and sustainability.

That happen to us when we age.

I think we place too much emphasis on high impact exercises, like running, that are bad on the joints, and not enough emphasis on strength training exercises that might reduce impact on the joints.

Intensity, sir.

Exercise improves my knee function . If I don't exercise it goes downhill fast . Movement is critical

In all things balance

There's the whole 'use it or lose it' theory. I don't think a lot of sedentary people are walking around with great knees. Certainly it's a bad idea to directly injure them, but they need movement to work properly.