I have medial meniscus and ACL, I used to have a intense pain while walking and knee locking problem till 6 months back. But since 6 months I don't have pain while walking now. It might come sometimes suddenly while walking for about 10 minutes then go away. Knee locking also reduced a bit.I manage to sit on floor for a decent time now unlike before when I used to have knee lock when I sat on floor for 5 minites. Why is it so? Can I do static biking, Squats in GYM for strengthening of my knees