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Test-retest reliability of entire time-series data from hip, knee and ankle kinematics and kinetics during one-leg hops for distance: Analyses using integrated pointwise indices
Umeå University, Faculty of Social Sciences, Umeå School of Business and Economics (USBE), Statistics.ORCID iD: 0000-0001-7917-5687
Department of Statistical Sciences, Università Cattolica del Sacro Cuore, Milan, Italy.
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Physiotherapy.ORCID iD: 0000-0002-6339-9544
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Physiotherapy.ORCID iD: 0000-0002-0366-4609
2021 (English)In: Journal of Biomechanics, ISSN 0021-9290, E-ISSN 1873-2380, Vol. 124, article id 110546Article in journal (Refereed) Published
Abstract [en]

Motion capture systems enable in-depth interpretations of human movements based on data from three-dimensional joint angles and moments. Such analyses carry important bearings for evaluation of movement control during for instance hop landings among sports-active individuals from a performance perspective but also in rehabilitation. Recent statistical development allows analysis of entire time-series of angle and moment during hops using functional data analysis, but the reliability of such multifaceted data is not established. We used integrated pointwise indices (intra-class correlation, ICC; standard error of measurement, SEM) to establish the test–retest reliability of three-dimensional hip, knee and ankle angle and moment curves during landings of one-leg hop for distance (OLHD) in 23 asymptomatic individuals aged 18–28. We contrasted these findings to reliability of discrete variables extracted at specific events (initial contact, peak value). We extended the calculations of ICC and SEM to handle unbalanced situations (varying number of repetitions) to include all available data. Hip and knee angle curves proved reliable with stable ICC curves throughout the landing, with integrated ICCs ≥ 0.71 for all planes except for knee internal/external rotation (ICC = 0.57). Hip and knee moment curves and ankle angle and moments were less reliable and less stable, particularly in the first ~ 10–25% of the landing (integrated ICCs 0.44–0.57). Curve data were generally not in agreement with the results for discrete event data, thus advocating analysis of curve data which contains more information. To conclude, hip and knee angle curve data during OLHD landings can reliably be evaluated, while moment curves necessitate careful consideration.

Place, publisher, year, edition, pages
2021. Vol. 124, article id 110546
Keywords [en]
Biomechanics, Functional data, Hop testing, Knee injury rehabilitation, Landing, Motion analysis
National Category
Physiotherapy
Identifiers
URN: urn:nbn:se:umu:diva-185447DOI: 10.1016/j.jbiomech.2021.110546ISI: 000672847300006Scopus ID: 2-s2.0-85108384444OAI: oai:DiVA.org:umu-185447DiVA, id: diva2:1575742
Funder
Swedish Research Council, 2016-02763, 2017-00892, 7002795, ALF VLL548501, VLL-358901, VLL838421Swedish National Centre for Research in Sports, 2017/8 P2018-0104Konung Gustaf V:s och Drottning Victorias FrimurarestiftelseAvailable from: 2021-06-30 Created: 2021-06-30 Last updated: 2023-09-05Bibliographically approved

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Schelin, LinaMarkström, Jonas L.Häger, Charlotte K.

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