Validity, reliability, and usefulness of My Jump 2 app for measuring vertical jump in primary school children

Bogataj, Špela (author), Pajek, Maja (author), Hadžić, Vedran (author), Andrašić, Slobodan (author), Padulo, Johnny (author), Trajković, Nebojša (author)

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.

• Language: English
• Keywords: sport, young adolescents, jumping ability, assessment, physical education, testing
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FŠ - Faculty of Sport
• Publication status: Published
• Publication version: Version of Record
• Year: 2020
• Number of pages: 12 str.
• Numbering: Vol. 17, iss. 10, art. 3708
• PID: 20.500.12556/RUL-133680
• UDC: 796.01-053.6
• ISSN on article: 1660-4601
• DOI: 10.3390/ijerph17103708
• COBISS.SI-ID: 17296643
• Publication date in RUL: 08.12.2021

Record is a part of a journal

• Title: International journal of environmental research and public health
• Shortened title: Int. j. environ. res. public health
• Publisher: MDPI
• ISSN: 1660-4601
• COBISS.SI-ID: 1818965

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 25.05.2020

Secondary language

• Language: Slovenian
• Keywords: šport, mladi, najstniki, adolescenti, skakanje, uspeh, športna vzgoja, testiranje