IRCT20100811004549N10 IRCT 2018-03-23 Semnan University of Medical Sciences The effect of exercise on the balance of patients with knee osteoarthritis Comparison of the effect of anaerobic strengthening exercises and aerobic exercise (walking) on the balance of patients with knee osteoarthritis. 2018-04-03 anticipated 40 Complete https://irct.ir/trial/28230 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: The volunteers are randomly assigned to two intervention groups by lottery. N/A Knee osteoarthritis. Intervention 1: Aerobic exercise group: The patient walk on treadmill for 50% to 85 % of the maximum heart rate for 40 minutes.The maximum heart rate during walking depending on the patient's tolerance, will increase gradually. To cool down, five minutes of walking will be done at a low speed. The patient walk on tredmill for 50% to 85 % of the maximum heart rate for 40 minutes.The maximum heart rate during walking depending on the patient's tolerance, will increase gradually. To cool down, five minutes of walking will be done at a low speed. Intervention 2: strengthening exercises group: Strength training protocol included flexion and extension exercise of the knee joint utilizing a Quadriceps chair. each exercise sessions included 3 sets with 2 minutes intervals. The load of exercise increased progressively from 60 to 65 of 10 RM in the first, 70 20 75% of 10 RM in the second and 80 to 85% of 10 RM in the third. The amount of 10 RM are assessed every week for each participant. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is No more information.