Indicators: Pain, stiffness and in some cases swelling in the joint; also, loss of versatility from the joint​ When standing, It is really important to maintain your knees straight but not locked. This placement aids keep joint balance and assures appropriate blood circulation. Locking the knees may possibly lower muscle mass https://www.theorthopaedicandpainpractice.com/understanding-and-treating-elderly-knee-pain/