Comparison of 2D video and electrogoniometry measurements of knee flexion angle during a countermovement jump and landing task

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Deutscher übersetzter Titel:Vergleich von zweidimensionalen Videomessungen und elektrogoniometrischen Messungen des Knieflexionswinkels während eines Countermovement-Sprungs und der Landung
Autor:Petushek, Erich; Richter, Chris; Donovan, David; Ebben, William P.; Watts, Phillip B.; Jensen, Randall L.
Erschienen in:Sports engineering
Veröffentlicht:15 (2012), 3, S. 159-166, Lit.
Format: Literatur (SPOLIT)
Publikationstyp: Zeitschriftenartikel
Medienart: Gedruckte Ressource
Sprache:Englisch
ISSN:1369-7072, 1460-2687
DOI:10.1007/s12283-012-0094-7
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Erfassungsnummer:PU201210006531
Quelle:BISp

Abstract

Quantifying countermovement jump (CMJ) and landing knee flexion angle is important for performance and injury risk assessment. The purpose of the study was to compare electrogoniometer (El-Gon)- and video-derived CMJ and landing knee flexion angle. Twenty-two adults performed three CMJs while knee flexion angle was simultaneously assessed using an El-Gon and video. The average systematic offset (RMSE) of the El-Gon-derived knee flexion angle throughout the entire movement was 7.03° ± 2.69°. Excellent reliability was demonstrated by the El-Gon (ICCavg = 0.92). Countermovement knee flexion angle, maximum landing knee flexion angle and flexion angle at maximum vertical ground reaction force were 12.0°, 10.9°, and 5.7° higher, respectively, when assessed using El-Gon (p < 0.001), compared to video. Errors between instruments are likely due to El-Gon crosstalk, misalignment and/or axis determination. The El-Gon is a cost-effective and time-efficient alternative to video analysis for the assessment of knee flexion angle if the error is accounted for and the sensor is precisely attached. Verf.-Referat