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Precision and reliability of a dynamometer for trunk extension strength and steadiness assessment

2025-04-08Research article Open access
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dc.contributor.authorParolini, Franciele
dc.contributor.authorGoethel, Márcio
dc.contributor.authorRobalino, Johan
dc.contributor.authorBecker, Klaus
dc.contributor.authorSousa, Manoela
dc.contributor.authorPulcineli, Barbara C.
dc.contributor.authorErvilha, Ulysses F.
dc.contributor.authorVilas-Boas, João Paulo
dc.contributor.authorSantos, Rubim
dc.contributor.authorRubim Silva Santos, Manuel
dc.contributor.authorCarvalho Santos Parolini, Franciele
dc.date.accessioned2025-04-08T13:13:56Z
dc.date.available2025-04-08T13:13:56Z
dc.date.issued2025-04-08
dc.description.abstractLow back pain is a major cause of disability worldwide, often associated with deficits in trunk extensor strength control. Accurate assessment of trunk extension strength control is crucial for diagnosing impairments and monitoring interventions. This study evaluated the reliability of a dynamometry-based protocol for isometric trunk extension strength control assessment. Twenty-eight healthy volunteers (9 females, 19 males) completed two sessions, seven days apart. A single-point load cell system, encapsulated within a 3D-printed structure and connected to a Delsys system® at a sampling frequency of 2000 Hz, was used for data acquisition. Participants performed maximal voluntary contractions (MVC) and submaximal isometric contractions (SMVC) guided by trapezoidal visual feedback. Key outcome variables included peak force, mean force, and force steadiness. Calibration demonstrated high accuracy (R2 = 1) with a low root mean square error (0.55 N). Test–retest analysis showed excellent reliability for peak force (ICC = 0.81, SEM = 0.50, MDC = 1.39), mean force (ICC = 0.93, SEM = 0.17, MDC = 1.08), and steadiness (ICC = 0.87, SEM = 0.85, MDC = 2.36), with no significant intersession differences (p > 0.05). This study demonstrates the high reliability of using dynamometry to assess trunk extension strength during MVC and SMVC, endorsing the dynamometer as a tool for functional assessment and the development of personalized rehabilitation and training strategies.por
dc.identifier.citationParolini, F., Goethel, M., Robalino, J., Becker, K., Sousa, M., Pulcineli, B. C., Ervilha, U. F., Vilas-Boas, J. P., & Santos, R. (2025). Precision and reliability of a dynamometer for trunk extension strength and steadiness assessment. Applied Sciences, 15(8), Artigo 8. https://doi.org/10.3390/app15084081
dc.identifier.doi10.3390/app15084081
dc.identifier.issn2076-3417
dc.identifier.urihttp://hdl.handle.net/10400.22/29944
dc.language.isoeng
dc.peerreviewedyes
dc.publisherMDPI
dc.relationUI/BD/151415/2021
dc.relation.hasversionhttps://www.mdpi.com/2076-3417/15/8/4081
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectLow back pain
dc.subjectMaximal voluntary contractions
dc.subjectCustomized dynamometry
dc.subjectMuscle function
dc.titlePrecision and reliability of a dynamometer for trunk extension strength and steadiness assessmentpor
dc.typeresearch article
dspace.entity.typePublication
oaire.citation.issue8
oaire.citation.titleApplied Sciences
oaire.citation.volume15
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameRubim Silva Santos
person.familyNameCarvalho Santos Parolini
person.givenNameManuel
person.givenNameFranciele
person.identifier.ciencia-idA018-2B24-C597
person.identifier.ciencia-id7A15-D089-9627
person.identifier.orcid0000-0002-7394-7604
person.identifier.orcid0000-0001-6765-6475
relation.isAuthorOfPublication0a264044-a870-4fca-b976-f7ce003d23a8
relation.isAuthorOfPublication52bcd7e1-57ed-425f-8dcf-00cceb42eb70
relation.isAuthorOfPublication.latestForDiscovery0a264044-a870-4fca-b976-f7ce003d23a8

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