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Abstract

Background: Osteoarthritis (OA), the most common form of joint disease, can result in long-term disability. Limitation of activity in OA patients may result in a decline in the strength of quadriceps femoris muscles and thus further reduce mobility. Isometric exercise has been known to increase muscle strength, decrease pain, and improve knee function.

Objective: To evaluate knee function measured by timed up-and-go test (TUGT) and stair-climbing test (SCT) as well as muscle strength in the fourth and sixth week after isometric exercise of quadriceps femoris muscles and the correlation between these variables.
Methods: Female patients with OA underwent isometric exercise of quadriceps femoris muscles 3 times a week for 6 weeks. Muscle strength (measured by tensiometer cable) and knee function (measured by TUGT and SCT) were evaluated before and at week 4
and 6 of the exercise.

Results: Thirty fi ve female patients were recruited in this study. The majority of the patients (45.7%) were between 60 to 65 years old. Obesity was found in 62.86% of the patients. At week 6, there was significant decrease in mean TUGT and SCT (by 39.0% and 45.6%, respectively; p<0.001), and signifi cant increase in mean right and left quadriceps muscles strength (by 47.9% and 36.7%, respectively; p<0.001). There was a weak
negative correlation (nonsignifi cant) of the increased strength of quadriceps muscles with the increase of knee function according to TUGT (right leg: r = -0.172, p = 0.323; left leg: -0.303, p = 0.077) and SCT (right leg: r = -0.031, p = 0.860); left leg: r = -0.058, p = 0.742).

Conclusion: In female patients in this study, significant improvement was found in the strength of quadriceps muscles, TUGT, and SCT after 6 weeks of isometric exercise. There was no signifi cant correlation between muscle strength and knee function according to TUGT and SCT.

Article Details

How to Cite
Widjanantie, S. C., Tulaar, A. B., Kasjmir, Y. I., & Prasetyo, S. B. (2018). Knee function measured by timed up-and-go test and stair-climbing test after isometric exercise of quadriceps femoris muscles in female patients with knee osteoarthritis. Indonesian Journal of Rheumatology, 3(1). https://doi.org/10.37275/ijr.v3i1.39

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