Test-retest reliability of isometric and isokinetic wrist strength

Author(s)

Prando, Beatriz Cardinal ; Carvalho, Cristiano ; Petrella, Marina ; Serrao, Paula Regina Mendes da Silva

• Document type: Journal article
• Source: JOURNAL OF ORTHOPAEDIC SCIENCE; v. 28, n. 1, p. 5-pg., 2023-01-03.

Abstract

Background: The isokinetic dynamometer has been considered the gold-standard measurement of muscle performance. However, the reliability for the isometric and isokinetic wrist flexor and extensor strength using the Biodex isokinetic dynamometer has not been reported to date. This study evaluated test-retest reliability of isometric and isokinetic wrist strength using the Biodex System 3 isokinetic dynamometer.Methods: This is a test-retest reliability study. Peak concentric and isometric torque was determined of the dominant limb wrist flexor and extensor of healthy individuals using the Biodex Multi-Joint System 3 dynamometer. The participants were evaluated by the same examiner in two different sessions separated by an interval of two to seven days. Reliability was investigated using the intraclass correlation coeffi-cient (ICC2,1), standard error of measurement (SEM) and minimum detectable difference (MDD).Results: Twenty healthy subjects participated in the study. The ICCs for concentric and isometric torque of the wrist flexor and extensor ranged from 0.79 to 0.91, revealing excellent intra-examiner test-retest reliability; SEM ranging from 0.4 to 1.5; and MDD ranged from 1.12 Nm to 4.17 Nm.Conclusions: Excellent intra-examiner test-retest reliability was found regarding peak concentric toque of the wrist flexor and extensor at an angular velocity of 45 degrees/s as well as isometric torque of the wrist flexor and extensor in healthy individuals measured using the Biodex System 3 isokinetic dynamometer.(c) 2021 The Japanese Orthopaedic Association. Published by Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 18/13122-0 - Study of the strength and electromyographic activity of flexors and extensors muscles of the wrist in cheerleaders with and without pain in the wrist
• Grantee: Beatriz Cardinal Prando
• Support Opportunities: Scholarships in Brazil - Scientific Initiation