Effect of Retro Walking Versus Isometric Multi-angular Exercises on Pain and Functional Performance in Knee Osteoarthritis in Geriatric Population

Osteoarthritis is a leading musculoskeletal cause of disability in elderly persons all over the world and a major cause of physical limitations and reduced quality of life (1). Its onset is around 40 years of age and it is estimated that over 80% of people over 55 have evidence of radiographic changes in the knee due to osteoarthritis. It has been estimated that the incidence has increased by the increase in life expectancy and it has been identified as a frequent cause for health services demand in patients over 65(2). The common clinical manifestations of knee OA include pain, stiffness, joint enlargement, crepitus, muscle weakness, deformity, impaired proprioception, reduced joint motion, and disability(3). Patients with knee Osteoarthritis seems to develop their own gait pattern and try to unload the affected structures during gait. More over patients with less severe knee osteoarthritis develop a gait pattern that differs from patients with severe osteoarthritis and control group of patients (4). Isometric exercises are types of strength training in which the joint angle and muscle length do not change during contraction, and therefore this approach can be advantageous in the early stages of knee rehabilitation in cases where the range of motion is restricted due to pain (13). No physical work is performed during isometric exercise. Intensity and duration combination reflects the energy consumption of an isometric contraction (14). In addition, muscle strength increases in isometric exercise are specific to the angle applied. It was also concluded that isometric exercise performed at different angles should be especially considered as an alternative strength training since it induces the most noticeable and fastest increase in muscle moment (15). A study was conducted to investigate the effects of isometric quadriceps exercise on muscle strength, pain, and function in knee osteoarthritis, it was concluded that isometric quadriceps exercise program showed ben