eli5: how does it work that for every pound of weight you lose, there is a 4 pound stress reduction in your knees?

Question

eli5: how does it work that for every pound of weight you lose, there is a 4 pound stress reduction in your knees?

In: 1542

Answer 1

Gravity! Gravity is pulling us toward the earth at about 4lbs. So for every pound you lose, gravity isn’t pulling that pound down at 4lbs.