Abstract
[Purpose] To assess the effect of hamstring and quadriceps strengthening exercises on
pain intensity, gait velocity, maximum isometric strength, and activities of daily living
of patients with knee osteoarthritis (OA). [Subjects and Methods] A total of 20 patients
with knee OA, 50 to 65 years of age (57.65 ± 4.78 years), received hot packs,
strengthening exercises for the quadriceps and the hamstring muscles and stretching
exercises for hamstring muscles. Outcome measures included: the Western Ontario and
McMaster Universities OA index questionnaire (WOMAC) scores for assessing health status
and health outcomes of knee OA; self-reported pain intensity scores, measured using a
visual analogue scale; the 50 ft walk test (a measure of gait velocity and function); and
handheld dynamometry (a tool used to measure maximum isometric strength of knee extension
and flexion). [Results] There was a significant difference between pre- and
post-intervention measures of pain intensity, 50 ft walk times, hamstring strength, and
quadriceps strength. Significant differences in WOMAC measures were also observed in the
subscales of pain, stiffness and physical function, as well as WOMAC total scores.
[Conclusion] Strengthening the hamstring muscles in addition to strengthening the
quadriceps muscles proved to be beneficial for perceived knee pain, range of motion, and
decreasing the limitation of functional performance of patients with knee OA.