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The validity and reliability of an iPhone app for measuring vertical jump performance

Balsalobre-Fernández, Carlos, Glaister, Mark, Lockey, Richard Anthony·2015·Journal of Sports Sciences

DOI 10.1080/02640414.2014.996184

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Abstract

The purpose of this investigation was to analyse the concurrent validity and reliability of an iPhone app (called: My Jump) for measuring vertical jump performance. Twenty recreationally active healthy men (age: 22.1 ± 3.6 years) completed five maximal countermovement jumps, which were evaluated using a force platform (time in the air method) and a specially designed iPhone app. My jump was developed to calculate the jump height from flight time using the high-speed video recording facility on the iPhone 5 s. Jump heights of the 100 jumps measured, for both devices, were compared using the intraclass correlation coefficient, Pearson product moment correlation coefficient (r), Cronbach's alpha (α), coefficient of variation and Bland-Altman plots. There was almost perfect agreement between the force platform and My Jump for the countermovement jump height (intraclass correlation coefficient = 0.997, P < 0.001; Bland-Altman bias = 1.1 ± 0.5 cm, P < 0.001). In comparison with the force platform, My Jump showed good validity for the CMJ height (r = 0.995, P < 0.001). The results of the present study showed that CMJ height can be easily, accurately and reliably evaluated using a specially developed iPhone 5 s app.

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Authors: Balsalobre-Fernández, C., Glaister, M., & Lockey, R. A.
Affiliations: Department of Physical Education, Sport and Human Movement, Autonomous University of Madrid, Madrid, Spain
St Mary's University Twickenham London (GB)
ORCID: Glaister, Mark
Venue: Journal of Sports Sciences
Publisher: Informa UK Limited
Published: 2015-01-02
Volume: 33
Issue: 15
Pages: 1574-1579
ISSN: 0264-0414 (ISSN-L)
1466-447X
DOI: 10.1080/02640414.2014.996184
OpenAlex: W2013598477
Cited by: 621
References: 31
Citations by year: 2026: 57 · 2025: 69 · 2024: 89 · 2023: 90 · 2022: 63 · 2021: 58 · 2020: 64 · 2019: 38 · 2018: 55 · 2017: 22 · 2016: 9 · 2015: 7
FWCI: 31.86
Type: journal article
Language: en
Open access: closed
Locations: Journal of Sports Sciences (publishedVersion)
PubMed (publishedVersion)
St Mary's University Repository (St Mary's University Twickenham London) (acceptedVersion)
Topics: Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
Health Sciences › Health Professions › Physical Therapy, Sports Therapy and Rehabilitation › Physical Education and Training Studies
Physical Sciences › Engineering › Biomedical Engineering › Sports Dynamics and Biomechanics
Keywords: vertical jump, countermovement jump, iOS app, concurrent validity, test-retest reliability, high-speed video, jump height measurement, force plate
MeSH terms: Humans, Male, Movement, Reproducibility of Results, Lower Extremity, Athletic Performance, Young Adult, Mobile Applications

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The validity and reliability of an iPhone app for measuring vertical jump performance

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