Inclusion Criteria:  Chronic osteoarthritis (more than 3 months) with pain in one knee joint (unilateral) A prior medical diagnosis having radiographic evidence of grade 2 and 3 of Kellgren and Lawrence criteria for knee osteoarthritis by an orthopedic. Pain intensity level more than 3 points of the numeric pain rating scale.  Exclusion Criteria:  Any acute inflammation, contracture, or surgery affecting the knee joint. Any cognitive problem. Participants taking non-steroid anti-inflammatory drugs, intra-articular injection, or physical therapy within the last three months for the knee joint. Participants having a lumbar spine and/or any other lower limb impairment and/or surgery affecting knee joint.