Reliability of My Jump 2 Derived from Crouching and Standing Observation Heights

Jose M. Jimenez-Olmedo, Basilio Pueo (), Jose M. Mossi and Lamberto Villalon-Gasch
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Jose M. Jimenez-Olmedo: Physical Education and Sport, University of Alicante, 03690 Alicante, Spain
Basilio Pueo: Physical Education and Sport, University of Alicante, 03690 Alicante, Spain
Jose M. Mossi: ITeam, Institute of Telecommunications and Multimedia Applications, Universitat Politècnica de València, 46022 Valencia, Spain
Lamberto Villalon-Gasch: Physical Education and Sport, University of Alicante, 03690 Alicante, Spain

IJERPH, 2022, vol. 19, issue 16, 1-12

Abstract: The crouching or prone-on-the-ground observation heights suggested by the My Jump app are not practical in some settings, so users usually hold smartphones in a standing posture. This study aimed to analyze the reliability of My Jump 2 from the standardized and standing positions. Two identical smartphones recorded 195 countermovement jump executions from 39 active adult athletes at heights 30 and 90 cm, which were randomly assessed by three experienced observers. The between-observer reliability was high for both observation heights separately (ICC~0.99; SEM~0.6 cm; CV~1.3%) with low systematic (0.1 cm) and random (±1.7 cm) errors. The within-observer reliability for the three observers comparing the standardized and standing positions was high (ICC~0.99; SEM~0.7 cm; CV~1.4%), showing errors of 0.3 ± 1.9 cm. Observer 2 was the least accurate out of the three, although reliability remained similar to the levels of agreement found in the literature. The reliability of the mean observations in each height also revealed high reliability (ICC = 0.993; SEM = 0.51 cm; CV = 1.05%, error 0.32 ± 1.4 cm). Therefore, the reliability in the standing position did not change with respect to the standardized position, so it can be regarded as an alternative method to using My Jump 2 with practical added benefits.

Keywords: smartphone; jump; error; test; within-observer; between-observer; measurement (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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