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Validity and reliability of a low-cost dynamometer to assess maximal isometric strength of upper limb.

Abstract：

:Muscle imbalance and deficit are key parameters for guiding rehabilitation and sports sessions and avoiding injuries. However, the high cost and non-portable nature of most instruments employed for muscle strength assessment frequently hamper an affordable evaluation in field conditions. This study evaluated the validity and reliability of a low-cost digital dynamometer to assess the maximal isometric strength of upper limb muscles. Fourteen physically active volunteers performed the main movements of the upper limb at maximal isometric strength: flexion-extension, internal-external rotation and abduction-adduction of the shoulder; and flexion-extension of both elbow and wrist. Validity was examined by comparing the strength values from the low-cost digital dynamometer and those measured by an isokinetic dynamometer, assumed as the gold standard. The correlation between both devices was perfect (r > 0.913), while Bland-Altman plots showed absolute agreement between both devices, the maximum range of the values of bias was -0.99-1.00 N in wrist extension. Inter-tester and intra-tester reliability were excellent for all movements (ICC ≥ 0.855). The low-cost digital dynamometer showed strong validity and excellent reliability in assessing maximal isometric strength during the main movements of the upper limb. Professionals may use it for an affordable isometric muscle strength assessment in field situations.

journal_name

J Sports Sci

journal_title

Journal of sports sciences

authors

Romero-Franco N,Fernández-Domínguez JC,Montaño-Munuera JA,Romero-Franco J,Jiménez-Reyes P

doi

10.1080/02640414.2019.1594570

subject

Has Abstract

pub_date

2019-08-01 00:00:00

pages

1787-1793

issue

15

eissn

0264-0414

issn

1466-447X

journal_volume

37

pub_type

杂志文章

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