Evidence of validity and reliability of Jumpo 2 and MyJump 2 for estimating vertical jump variables

PeerJ

article

Amilton Vieira¹  Gabriela L. Ribeiro¹  Victor Macedo¹  Valdinar de Araújo Rocha Junior¹  Roberto de Souza Baptista²  Carlos Gonçalves¹  Rafael Cunha¹  James Tufano³ 

[1] Strength and Conditioning Laboratory, Faculty of Physical Education, Universidade de Brasília;Automation and Robotics Laboratory, Faculty of Technology, Universidade de Brasília;Faculty of Physical Education and Sport, Charles University Prague

关键词: Countermovement jump;    Squat jump;    Power;    Force;    Velocity;   

DOI  :  10.7717/peerj.14558

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

BackgroundWe investigated the concurrent validity and test-retest reliability of the Jumpo 2 and MyJump 2 apps for estimating jump height, and the mean values of force, velocity, and power produced during countermovement (CMJ) and squat jumps (SJ).MethodsPhysically active university aged men (n = 10, 20 ± 3 years, 176 ± 6 cm, 68 ± 9 kg) jumped on a force plate (i.e., criterion) while being recorded by a smartphone slow-motion camera. The videos were analyzed using Jumpo 2 and MyJump 2 using a Samsung Galaxy S7 powered by the Android system. Validity and reliability were determined by regression analysis, typical error of estimates and measurements, and intraclass correlation coefficients.ResultsBoth apps provided a reliable estimate of jump height and the mean values of force, velocity, and power. Furthermore, estimates of jump height for CMJ and SJ and the mean force of the CMJ were valid. However, the apps presented impractical or poor validity correlations for velocity and power. Compared with criterion, the apps underestimated the velocity of the CMJ.ConclusionsTherefore, Jumpo 2 and MyJump 2 both provide a valid measure of jump height, but the remaining variables provided by these apps must be viewed with caution since the validity of force depends on jump type, while velocity (and as consequence power) could not be well estimated from the apps.

【 授权许可】

CC BY