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. 2024 May 17:12:e17387.
doi: 10.7717/peerj.17387. eCollection 2024.

Validity and reliability of My Jump 2® app to measure the vertical jump on elite women beach volleyball players

Alexandre Igor Araripe Medeiros  1   2   3 , Geovani Messias da Silva  1   2   4 , Francisco Oliveira Neto  1   2   5 , Mário Simim  1   2 , Túlio Banja  1   2 , Victor S Coswig  2 , José Afonso  3 , Ana Ramos  3 , Isabel Mesquita  3
Affiliations

Validity and reliability of My Jump 2® app to measure the vertical jump on elite women beach volleyball players

Alexandre Igor Araripe Medeiros et al. PeerJ. .

Abstract

Purpose: The aim of this study was to assess the reliability and validity of the My Jump 2® app in measuring jump height, flight time, and peak power among elite women beach volleyball players on sand surfaces.

Methods: Eleven elite female beach volleyball players (aged 23.6 ± 6.2 years; weight 66.3 ± 5.8 kg; height 174.4 ± 5.8 cm; with 8.4 ± 4.8 years of professional experience) participated in this study. Each player performed six countermovement jumps in a wooden box filled with sand on a force platform while simultaneously recording a video for subsequent analysis using the My Jump 2® app.

Results: We found excellent agreement for flight time, jump height and peak power between observers (ICC = 0.92, 0.91 and 0.97, respectively). No significant differences between force platform and My Jump 2® app were detected in the values obtained for the three variables (P > 0.05). For the force platform and the My Jump 2® app, we found a good agreement measuring jump height and flight time (ICC = 0.85 and 0.85, respectively). However, we only found a moderate agreement for peak power (ICC = 0.64). The difference in jump height showed a limit of agreement between -4.10 and 4.74 cm in Bland-Altman, indicating a high level of agreement between the two measurement tools.

Conclusion: Based on our findings, the My Jump 2® app reveals a valid tool for measuring jump height and flight time of CMJ on sand surfaces. However, more caution is needed when measuring peak power.

Keywords: Biomechanics; Force platform; Microtechnology; Mobile device; Motion analysis; Physical performance; Testing.

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Conflict of interest statement

Victor Coswig and Alexandre Igor Araripe Medeiros are an Academic Editor for PeerJ.

Figures

Figure 1
Figure 1. Wooden box filled with sand with wooden structure (50 cm width).
Figure 2
Figure 2. Correlation between two observers using the My Jump 2® app.
Figure 3
Figure 3. Correlation between two observers mean using the My Jump 2® app and force platform.
Figure 4
Figure 4. Agreement analysis between two observers for jump variables using the Bland-Altman method.
Figure 5
Figure 5. Agreement analysis between the My Jump 2® app and force platform for jump variables using the Bland-Altman method.
See this image and copyright information in PMC

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