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Knee Osteoarthritis AND Hip Abductors AND Quadriceps Background:Thigh muscle strengthening is important in knee osteoarthritis patients, this study will investigate if hip abductors strengthening can improve knee pain, function and quadricepsisometric strength comparable to knee extensor strengthening. Methods/Design: A pretest-posttest two groups study designwill be applied in Faculty of Physical Therapy ,Cairo University. 70 patients with knee osteoarthritis will be recruited with age ranges from 50-70. They will be randomized into 2 groups; hip abductors strengthening (HAS) group a will receive hip abductors strengthening exercises(Hip abduction standing-Clamshell-lateral leg raise-pelvic lift trainingstretching Hamstrings) and knee extensor strengthening (KES) group will receive (Isometric quadriceps setting-Knee extensions from sitting with knee bend to 90 0-Terminal knee extension from sitting-stretching Hamstrings), the treatment for 6 weeks ,baseline and 6 weeks assessment of knee function will be done using ArWOMAC index, Timed Up and Go test and Quadriceps muscle strength assessment using Hand held Dynamometer. Sample size: 70 patients based on power analysis using G*power software. Conclusion: Strengthening hip abductors only offer significant effects ; reaching same target with less risk of knee OA progression from knee extensor strengthening. Trial Registration:Clinicaltrial.gov,NCT04503304(Effect of Hip Abductors Versus Knee extensor Strengthening in Knee Osteoarthritis),Registration date 6/8/2020.

Physical therapist at outpatient clinic of faculty of physical therapy, cairo university, giza, egypt. 2. Department of physical therapy for musculoskeletal disorders and its surgery, faculty of physical therapy, cairo university, giza, egypt. 3. Department of orthopaedic surgery and traumatology, faculty of medicine, cairo university, cairo, egypt.

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Purpose. To detect effect of hip abductors against quadriceps exercises on quadriceps isometric strength in Knee OA individuals. Methods. Seventy patients with bilateral knee OA were recruited , ages ranged between 50-70 years. They were randomized into equal groups; hip abductors strengthening exercises (HAS) group and knee extensors strengthening (KES) group. Both groups received hamstring stretch. Duration was 6 weeks (2 sessions per week). Baseline and 6 weeks assessments of quadriceps isometric strength were done using hand held dynamometer. Results. there wasn’t any statistical significant difference between the two groups. Conclusion. Both forms of exercises have the same effect on quadriceps isometric strength.