Validity and Reliability of the MyJump 2 Application for Measuring Vertical Jump in Youth Soccer Players Across Age Groups

Strategic Insights -

A study conducted by researchers from the Aristotle University of Thessaloniki aimed to assess the validity and intra-session reliability of the MyJump 2 smartphone application for evaluating countermovement jump (CMJ) and squat jump (SJ) performance in youth soccer players. The research involved 21 male soccer players from an elite team, who underwent CMJ and SJ assessments using both the MyJump 2 application and the Chronojump contact mat system. The results showed minor systematic overestimation by MyJump 2, but strong correlations between the two systems, indicating excellent reliability.

Key Takeaways:

  • The study aimed to assess the validity and intra-session reliability of the MyJump 2 smartphone application for evaluating CMJ and SJ performance in youth soccer players.
  • The research involved 21 male soccer players from an elite team (U14-U19) who underwent CMJ and SJ assessments using both the MyJump 2 application and the Chronojump contact mat system.
  • Results revealed minor systematic overestimation by MyJump 2 (+0.943 cm for CMJ; +1.042 cm for SJ).
  • Strong correlations were found between MyJump 2 and Chronojump (r = 0.972 for CMJ; r = 0.955 for SJ).
  • Intraclass correlation coefficients (ICC) exceeded 0.97 for both jump types, indicating excellent reliability.
  • The study concluded that MyJump 2 is a valid and reliable alternative for vertical jump testing in adolescent and junior soccer players.
  • The application is suitable for field-based performance monitoring regarding vertical jumping ability.

Statistics:

  • 21 male soccer players from an elite team (U14-U19) participated in the study.
  • CMJ and SJ assessments were recorded simultaneously by both the MyJump 2 application and the Chronojump contact mat system.
  • The results revealed minor systematic overestimation by MyJump 2: +0.943 cm for CMJ and +1.042 cm for SJ.
  • Strong correlations were found between MyJump 2 and Chronojump: r = 0.972 for CMJ and r = 0.955 for SJ.
  • ICCs exceeded 0.97 for both jump types, indicating excellent reliability.

Sources:

  • Validity and Reliability of the MyJump 2 Application for Measuring Vertical Jump in Youth Soccer Players Across Age Groups. Applied Sciences, 2025,15(11):6253. (Applied Sciences - http://www.mdpi.com/journal/applsci). The publisher for Applied Sciences is MDPI AG.
  • A free version of this journal article is available at https://doi-org.sdpl.idm.oclc.org/10.3390/app15116253.
  • Contact Andreas Stafylidis, Laboratory of Evaluation of Human Biological Performance, Department of Physical Education and Sports Sciences, Aristotle University of Thessaloniki, University Campus of Thermi, 57001 Thessaloniki, Greece.