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Validity, Reliability, and Usefulness of My Jump 2 App for Measuring Vertical Jump in Primary School Children

Author

Listed:
  • Špela Bogataj

    (Department of Nephrology, University Medical Centre, 1000 Ljubljana, Slovenia
    Faculty of Sport, University of Ljubljana, 1000 Ljubljana, Slovenia)

  • Maja Pajek

    (Faculty of Sport, University of Ljubljana, 1000 Ljubljana, Slovenia)

  • Vedran Hadžić

    (Faculty of Sport, University of Ljubljana, 1000 Ljubljana, Slovenia)

  • Slobodan Andrašić

    (Faculty of Economics Subotica, University of Novi Sad, 2100 Novi Sad, Serbia)

  • Johnny Padulo

    (Department of Biomedical Sciences for Health, Università degli Studi di Milano, 20133 Milan, Italy)

  • Nebojša Trajković

    (Faculty of Sport and Physical Education, University of Novi Sad, 21000 Novi Sad, Serbia)

Abstract

There is a persistent need in sport science for developing a measuring tool that is affordable, portable, and easy to use. We aimed to examine the concurrent validity and test–retest reliability of the My Jump 2 app compared to a validated OptoJump instrument for measuring jump performance during the squat jump (SJ), countermovement jump (CMJ), and CMJ free arms (CMJAM) in primary school children. A total of 48 participants (11–14 years age), volunteered to participate in this research. The jumps were recorded with a validated OptoJump photoelectric cell system and a concurrent device (iPhone X through My Jump 2 app) at the same time. The participants repeated the testing procedure after two weeks to assess the reliability of the measurements (ICC). Systematic bias between sessions and tools was evaluated using the paired samples t -test and Bland and Altman analysis. High test–retest reliability (ICC > 0.89) was observed for all measures’ in-between conditions. Very large correlations in the total sample were observed between the My Jump 2 app and OptoJump for SJ (r = 0.97, p = 0.001), CMJ (r = 0.97, p = 0.001), and CMJAM (r = 0.99, p = 0.001). Bland and Altman’s plot depicting limits of agreement for the total sample between the OptoJump and My Jump 2 show that the majority of data points are within the 95% CIs. The results of this study suggest that My Jump 2 is a valid, reliable, and useful tool for measuring jump performance in primary school children.

Suggested Citation

  • Špela Bogataj & Maja Pajek & Vedran Hadžić & Slobodan Andrašić & Johnny Padulo & Nebojša Trajković, 2020. "Validity, Reliability, and Usefulness of My Jump 2 App for Measuring Vertical Jump in Primary School Children," IJERPH, MDPI, vol. 17(10), pages 1-12, May.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:10:p:3708-:d:362426
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    Cited by:

    1. Jose M. Jimenez-Olmedo & Basilio Pueo & Jose M. Mossi & Lamberto Villalon-Gasch, 2022. "Reliability of My Jump 2 Derived from Crouching and Standing Observation Heights," IJERPH, MDPI, vol. 19(16), pages 1-12, August.

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