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ORIGINAL ARTICLE
Year : 2019  |  Volume : 13  |  Issue : 1  |  Page : 9-13

Reliability of modified sphygmomanometer for measurement of maximum isometric shoulder muscle strength


Department of Musculoskeletal PT, Sancheti Institute College of Physiotherapy, Sancheti Healthcare Academy, Pune, Maharashtra, India

Correspondence Address:
Dr. Nilima Bedekar
Sancheti Healthcare Academy, Thube Park, Shivajinagar, Pune - 411 005, Maharashtra
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/PJIAP.PJIAP_15_18

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BACKGROUND: To evaluate the changes in muscle performance, precise, reliable, and valid methods to assess muscle performance should be applied. Sphygmomanometer is an easily available instrument; it has been used to evaluate the isometric strength of various muscles in various conditions. The reliability of the method can be compromised by insufficient examiner's strength and insufficient stabilization of the sphygmomanometer and participant. The objective of this study was to investigate test–retest reliability of the sphygmomanometer to assess shoulder maximum voluntary isometric contraction (MVIC) against stable surface. METHODS: It was a cross-sectional study design using purposive sampling; 112 healthy individuals were recruited for strength testing. Over 3 days' interval, the MVIC of the shoulder flexor, abductor, extensor, external rotator, and internal rotator muscles strength was evaluated with an aneroid sphygmomanometer against the stable surface in sitting position. RESULTS: The results indicated excellent test–retest reliability (intraclass correlation coefficient = 0.995–0.999) with nonsignificant P value for (0.12) extensor and (0.179) internal rotator and significant P value for (0.01) flexor, (0.000) abductor, and (0.006) external rotator sphygmomanometer to assess the shoulder muscle strength against stable surface. CONCLUSION: A sphygmomanometer was found to have excellent test–retest reliability to assess the MVIC of shoulder muscles.


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