Well, I happen to have personal experience here. I had pain on the outside of my right knee for a few years. I also had clicking in my knees whenever I would sq

Well, I happen to have personal experience here. I had pain on the outside of my right knee for a few years. I also had clicking in my knees whenever I would squat down, ever since I was a teen. One day, I did an hour of Bulgarian split squats[1], which is a one leg exercise -- I did it with no weight. The next day my knee pain was essentially gone. One day! It turns out, after reading up on it, unilateral leg strength is important for knee health. The right muscles being strong and coordinated takes stress off the tendons, ligaments, and cartilage that support the knee. Doing one leg squats teaches and trains your glutes to balance and stabilize your body on one leg. [1] For an unrelated experiement.