Validade e reprodutibilidade de aplicativos de celular para medir a altura do salto vertical de crianças e adolescentes

Abstract

ROCHA, EF. Validity and reproducibility of mobile applications to measure the vertical jump height of children and adolescents. Campo Grande – MS, 2022. [Master's dissertation - Federal University of Mato Grosso do Sul].

Introduction: The assessment of the vertical jump is a good indicator of the ability to generate muscle power in the lower limbs and has a strong relationship with sports performance, injury prevention, metabolic markers, and psychobiological indices of perceived exertion, whether, in athletes or non-athletes, its applicability ranges from preschool children to the elderly. Objective: In this way, the present study proposes to verify the validity and reproducibility of the My Jump, Jumpo mobile applications to measure the height of the vertical jump in children and adolescents according to the maturational level. Methods: 104 children and adolescents of both sexes participated in the study, aged 12.65 ± 3.1, body mass = 50.4 ± 15.5, and height = 155.3 ± 18.2, two meetings were held with test-retest assessments for countermovement jump (CMJ) measured simultaneously with TC, MJ2, and JPO. The variables analyzed were height, time in the air, power (POT) and relative power (PRL), for statistical analysis, intraclass correlation coefficient (ICC), ANOVA test of variance, Student's t-test, and Wilcoxon test were used for comparison between dependent variables in addition to Bland-Altman graphs for correlation between method and application. Results: There was a correlation between groups by gender (ICC = 0.796 - 0.999), PVC groups (Pre PVC = 0.366 - 0.994), (Dur PVC = 0.593 - 0.983), (PVC Powders = 0.562 - 0.991), the variables Height and Time in the air had higher agreement CCI = 0.974 - 0.991 for all groups, the POT and PRL variables obtained a lower ICC agreement = 0.366 - 0.769. Bland-Altman's validity analyses for boys brings significant values comparing TP and MJ2 -0.32(-1.4 to 0.7), for comparison TP and JPO boys -1.22 (-2.6 to 0.2) p = 0.001 for both applications in the boys' group, for girls there was no difference p = 0.33 MJ and p = 0.13 JPO. Reproducibility in the entire sample (n=104) intra-evaluator MJ2 CCI (0.947 - 0.989) and JPO CCI (0.974 - 0.988) and for the analysis of Bland Altman MJ -0.8 (-4.4 to 2.8), JPO -1.1 (-5.0 to 2.8). Conclusion: Both applications are valid and reproducible when compared to TC, but both applications underestimate the values of the jump height variable, as the maturational groups, the applications seem to be more accurate for children in later stages of maturation. Another point is that POT and PRL values require further studies regarding their relationship between standard method and methods to be validated and also how much the use and standardization of equations used to measure lower-lower-member power.

Keywords: Muscular Power, Maturational Stage, Sport, Physical Activity.