Different Hold Durations in Isometric Exercises

Inclusion Criteria: * prediagnosed case of knee OA as per the American College of Rheumatology (ACR) and radiological evidence of primary osteoarthritis of grade 3 or less on the Kellgren Lawrence scale; * age between 40-65 years, including both men and women. * unilateral or bilateral involvement (in the case of bilateral involvement, the more symptomatic knee was included). Exclusion Criteria: * Other knee joint pathologies, eg, Chondromalacia patella, plica syndrome, * Neurological disorders. * Patients having lower extremity injury/surgeries in the past 6 months, * Hip or knee fractures or deformity, * joint infections and inflammatory joint disease, * physical therapy on the knee within the last 3 months or steroid injections,