RESUMO
OBJECTIVES: To examine the effects of a home-based lower-extremity strengthening exercise program in community-dwelling older women with knee osteoarthritis. DESIGN: Randomized controlled trial. SETTING AND PARTICIPANTS: Women aged ≥60 years with knee osteoarthritis and Kellgren-Lawrence grade 1 or 2 on anteroposterior/lateral radiographs of both knee joints. METHODS: Patients (n = 36) were randomly divided into experimental (EG) and control (CG) groups. The EG performed home-based remote rehabilitation lower-extremity strengthening exercises for 8 weeks, whereas the CG received no intervention. Assessment was performed at baseline and week 8. The primary outcome was the five-times sit-to-stand test (FTSST) result. Secondary outcomes included timed up-and-go (TUG) test results, knee extensor and flexor strength, quadriceps (rectus femoris) muscle activity, skeletal muscle index, blood pressure (BP), visual analog scale (VAS) scores, C-reactive protein level, and erythrocyte sedimentation rate. RESULTS: A statistically significant difference in the FTSST times was observed between the groups after 8 weeks of intervention (EG: 7.95 ± 1.08 seconds, CG: 10.01 ± 2.03 seconds, P < .001). In the EG, the TUG test score decreased by 0.75 ± 0.80 seconds (P = .002), right and left knee flexor strength increased by 4.69 ± 6.05 kg (P = .007) and 3.98 ± 6.98 kg (P = .038), respectively, and the right knee extensor root mean square (RMS) ratio increased by 1.24 ± 0.39 (P = .027). Additionally, systolic and diastolic BP decreased by 9.50 ± 10.75 mm Hg (P = .005) and 4.25 ± 4.91 mm Hg (P = .003), respectively. In the CG, the VAS scores decreased by 9.10 ± 13.68 mm (P = .022). CONCLUSIONS AND IMPLICATIONS: The home-based exercise program using a remote rehabilitation medical device was effective in improving lower extremity strength and function in community-dwelling older women with knee osteoarthritis. This finding suggests that the remote rehabilitation medical device may be used as an alternative to exercise interventions for patients with knee osteoarthritis.