Biology of Sport
eISSN: 2083-1862
ISSN: 0860-021X
Biology of Sport
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3/2017
vol. 34
 
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abstract:
Original paper

Validation of the VERT wearable jump monitor device in elite youth volleyball players

Thiago O. Borges
1
,
Alexandre Moreira
2
,
Renato Bacchi
3
,
Ronaldo L. Finotti
1, 4
,
Mayara Ramos
1
,
Charles R. Lopes
5
,
Marcelo S. Aoki
1

1.
School of Arts, Science and Humanities, University of São Paulo (USP), São Paulo, SP, Brazil
2.
School of Physical Education and Sport, University of São Paulo (USP), São Paulo, SP, Brazil
3.
Brazilian Volleyball Confederation (CBV), Saquarema, RJ, Brazil
4.
Industry Social Service of São Paulo (SESI), São Paulo, SP, Brazil
5.
Department of Physical Education, Adventist Faculty of Hortolândia (FAH), Hortolândia, SP, Brazil
Biol. Sport 2017;34:239-242
Online publish date: 2017/04/26
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This technical report aims to determine the validity and the accuracy of the VERT Wearable Jump Monitor. The participants of this study were all experienced volleyball players from the U18 category from the Brazilian National team. To assess jump performance, the VERT scores were compared to the VERTEC (jump and reach device). Each athlete performed 3 attack and 3 block jumps in a random, counterbalanced order, and the average score was registered. In the attack jumps, the VERTEC and VERT mean ± SD scores were 70.9±8.2 and 76.3±7.5 cm, respectively, and the typical error of the estimate (TEE) as a coefficient of variation (CV) was 7.8% (90% CL 7.0 to 8.9%). VERTEC and VERT devices presented a very large Pearson’s correlation for attack jumps (r=0.75; 90% CL 0.68 to 0.81). In addition, the mean±SD block jumps were 53.7±6.1 and 58.5±5.7 cm for the VERTEC and VERT, respectively and the TEE as a CV was 7.9% (90% CL 7.1 to 8.9%). Pearson’s correlation coefficient was very large for block jumps (r=0.75; 90% CL 0.67 to 0.81). The VERT device was found to be a very practical tool to quantify jump performance in volleyball players.
keywords:

Vertical jump, Lower limb, Power, Validity

 
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