Concurrent Validity and Reliability of In-Field Vertical Jump Performance Measures on Sand Surfaces

Wirtz, Svenja, Julian, Ross ORCID: 0000-0002-8558-7132, Schmale, Rieke and Eils, Eric (2024) Concurrent Validity and Reliability of In-Field Vertical Jump Performance Measures on Sand Surfaces. Journal of Strength and Conditioning Research, 38 (4). pp. 687-693. doi:10.1519/JSC.0000000000004681

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Wirtz, S, Julian, R, Schmale, R, and Eils, E. Concurrent validity and reliability of in-field vertical jump performance measures on sand surfaces. J Strength Cond Res XX(X): 000–000, 2023—Beach sports, such as handball, volleyball, and soccer, involve dynamic actions, primarily jumps. Nonetheless, there is a need for more established measurement devices that are both valid and feasible in accurately evaluating jumping performance on sand surfaces. This study aims to assess the reliability and concurrent validity of MyJump2 and an inertial measurement unit (VERT) for quantifying countermovement jump performance on the sand. Twenty-one subjects performed 5 countermovement jumps on the sand. Jumping height was measured simultaneously by a force plate, VERT, and MyJump2. The VERT and MyJump2 reliability measures were evaluated using the intraclass correlation coefficients (ICC) for both absolute agreement (ICC2,1) and consistency (ICC3.1). The day-to-day reliability of both devices and the interrater and intrarater reliability of the MyJump2 were assessed. The concurrent validity of the VERT and MyJump2 was assessed using ICCs2.1, 3.1 and Bland-Altman plots. A near-perfect agreement was seen for intrarater (ICC = 0.98) and interrater (ICC = 0.98) reliability of the MyJump2. Moreover, a near-perfect agreement was also observed when comparing the MyJump2 with the force plate (ICC = 0.92), with a mean bias of −2.31 cm. The VERT device only demonstrated a moderate agreement (ICC = 0.55) with a mean bias of 6.31 cm compared with the force plate, despite showing good day-to-day reliability (ICC = 0.79). The study's results indicate that MyJump2 is valid and reliable for assessing jump heights on sand surfaces, whereas VERT cannot be recommended.

Item Type: Article
Article Type: Article
Uncontrolled Keywords: Athlete monitoring; Beach sports; Testing; Countermovement jump; Mobile measurement devices; Unstable surface
Subjects: G Geography. Anthropology. Recreation > GV Recreation Leisure > GV557 Sports
Divisions: Schools and Research Institutes > School of Education and Science
Research Priority Areas: Health, Life Sciences, Sport and Wellbeing
Depositing User: Susan Turner
Date Deposited: 21 Dec 2023 15:58
Last Modified: 21 May 2024 16:04

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