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:: Volume 14, Issue 3 (Summer 2023) ::
Caspian J Intern Med 2023, 14(3): 433-442 Back to browse issues page
Effectiveness of muscle strengthening exercises on the clinical outcomes of patients with knee osteoarthritis: A randomized four-arm controlled trial
Alireza Sadeghi , Mina Rostami , Zakiye Khanlari , Alireza Zeraatchi , Nooshin Jalili , Arezoo Karimimoghaddam , Zhaleh Karimimoghaddam , Ramazan Fallah , Fateme Sangtarash
Department of Internal Medicine, Vali-e-Asr Hospital, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran , rsadeghi@zums.ac.ir
Abstract:   (1422 Views)
Background: Knee osteoarthritis (OA) is one of the major causes of dysfunction that reduces patients’ quality of life. The aim of current study was to investigate the effectiveness of muscle strengthening exercises on the clinical outcomes of patients with knee OA.
Methods: We conducted a single-blind clinical trial on 96 patients with mild to moderate knee osteoarthritis. Patients were randomly assigned to 4 groups with 24 patients and followed-up for 8 weeks. Quadriceps, hamstring and both hamstring and quadriceps strengthening exercises were received by the first (G1), second (G2) and third (G3) groups, respectively. The fourth group (G4) was the control group and did not receive any intervention. The main outcome variables were pain, physical function and morning stiffness. This study was retrospectively registered at irct.ir (Iranian Registry of Clinical Trials) with the code IRCT20220206053950N2, 2022-09-07
Results: Our findings demonstrated a significant impact of interventions on VAS score, pain, and stiffness (All, p < 0.001). Nonetheless, the effect of interventions was not significant for physical function (P = 0.78). After adjusting for the potential confounders, similar results were observed. Besides, the results of Dunnett post hoc test showed that either G1 or G3 had the most decrease in VAS and WOMAC-morning stiffness scores compared to G2 and G4.
Conclusion: Based on the evidence from the present study, we can recommend a combination of quadriceps and hamstring strengthening exercises as the most effective intervention to reduce pain and morning stiffness in patients with OA.

 
Keywords: Key words: Knee osteoarthritis, Exercise therapy, Quadriceps muscle, Hamstring muscle
Full-Text [PDF 304 kb]   (557 Downloads)    
Type of Study: Original Article | Subject: Internal
Received: 2021/10/13 | Accepted: 2022/10/19 | Published: 2023/05/30
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Sadeghi A, Rostami M, Khanlari Z, Zeraatchi A, Jalili N, Karimimoghaddam A, et al . Effectiveness of muscle strengthening exercises on the clinical outcomes of patients with knee osteoarthritis: A randomized four-arm controlled trial. Caspian J Intern Med 2023; 14 (3) :433-442
URL: http://caspjim.com/article-1-3158-en.html


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Volume 14, Issue 3 (Summer 2023) Back to browse issues page
Caspian Journal of Internal Medicine
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