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Knee osteoarthritis pain and stretching exercises: a systematic review and meta-analysis

  • Lijiang Luan
    Affiliations
    Xiamen Qingdun Fitness Management Co., Ltd., Xiamen, Fujian, China
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  • Doa El-Ansary
    Affiliations
    Faculty of Health, Art and Design, Swinburne University of Technology, Hawthorn, VIC, Australia
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  • Roger Adams
    Affiliations
    Research Institute for Sport and Exercise, University of Canberra, Bruce, ACT, Australia
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  • Sam Wu
    Affiliations
    Faculty of Health, Art and Design, Swinburne University of Technology, Hawthorn, VIC, Australia
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  • Jia Han
    Correspondence
    Corresponding author at: Department of Physiotherapy and Sports Rehabilitation, Room 306, Scientific building, 200 Hengren Road, Yangpu District, Shanghai, 200438 China.
    Affiliations
    Department of Physiotherapy and Sports Rehabilitation, Shanghai University of Sport, Shanghai, China

    Faculty of Health, Art and Design, Swinburne University of Technology, Hawthorn, VIC, Australia

    Research Institute for Sport and Exercise, University of Canberra, Bruce, ACT, Australia
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Published:October 11, 2021DOI:https://doi.org/10.1016/j.physio.2021.10.001

      Abstract

      Objective

      To evaluate the effectiveness of stretching exercises for pain relief in individuals with knee osteoarthritis (KOA).

      Data sources

      Nine databases (PubMed, Embase, Cochrane Library, Web of Science, EBSCO, PEDro, CNKI, WanFang and CQVIP) were searched in December 2020.

      Study selection

      Randomised controlled trials (RCTs) involving stretching exercises conducted on individuals with KOA were included.

      Study appraisal and synthesis methods

      Literature quality and risk of bias were assessed with the Physiotherapy Evidence Database scale and Cochrane Collaboration tool, respectively. Data were extracted by two independent assessors using a standardised form. The weighted mean difference (WMD) and standard deviations (SD) with 95% confidence intervals (CI) were analysed.

      Results

      In total, 373 studies were screened, with a final selection of 19 RCTs involving 1250 participants; of these, 18 RCTs were included in the final meta-analysis. When stretching exercises were used alone, the reduction of pain using a visual analogue scale was both significant and clinically meaningful (WMD 1.86; 95% CI 1.31 to 2.41). When stretching exercises were used in combination with other exercises, the pain reduction was still significant but its clinical significance became questionable (WMD 1.31; 95% CI 0.77 to 1.85).

      Limitations

      The sample size of studies using stretching exercises alone was small, and some of the pooled studies were heterogeneous.

      Conclusions

      Stretching exercises can be useful in pain management in individuals with KOA, especially when used alone. Programmes involving both stretching exercises and other exercises may improve function but may not achieve a clinically effective reduction in pain.
      Systematic review registration number Research Registry (No. reviewregistry813).

      Keywords

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