Originally Posted by
deapee
It's not nonsense. Adding load to your knees (not a muscle, cannot adapt and grow stronger) is NOT good for them. He didn't say it's definitely bad for them, just that it's not good for them.
And I'm saying that squatting to full depth doesn't increase the load on your knee joint, it increases the eccentric load on your hamstrings and glutes. Also strengthening the muscles around a joint is good for the joint. Barbell squats have absolutely been good for my knees.
IMHO squats carry more injury risk for the back than the knees, which is why it's important to use strict form and use a weight that doesn't cause your form to break down.