Inclusion criteria:
Age 40 years or more, having American College of Rheumatology clinical criteria for knee OA , having primarily internal compartment disease greater than II on the Kellgren and Lawrence radiographic disease severity scale.
Exclusion criteria:
Age 40> years, stroke, tumors, patients who couldn’t walk without assistant equipment, patients with a ban to enter the pool, patients who have received other training or nutritional treatments in the last three months, Patients who had obesity criterion, neuromuscular diseases such as MS and Parkinson's disease, patients who had a history of heart disease, fractures in the lower extremities, pain in the back or thigh, hip osteoarthritis simultaneously, at the waited list for arthroplasty surgery, or do it