I have this problem where if I do squats, lunges and other such legs workout for 2-3 days, I get some kind of stiffness or pain in my left knee and then if I rest stress my knees for next 2-3 days, the pain goes away. I am aware that my quadriceps and hamstring are not very strong because I have started to excercise just now and hence there might be some extra load being put on my knees. And hence I wanted to know how do I get out of this loop where I have weak muscle strength which puts strain on my knee which in turn makes me stop excercise which then again leads to weak muscle.