El tipo de plataforma de contacto influye en el registro de la altura de salto vertical estimada a partir del tiempo de vuelo

  1. García López, Juan
  2. Rodríguez Marroyo, José Antonio
  3. Pernía Cubillo, Raúl
  4. Ávila Ordás, María Concepción
  5. Villa Vicente, José G.
Revista:
European Journal of Human Movement

ISSN: 0214-0071 2386-4095

Any de publicació: 2008

Número: 21

Pàgines: 1-15

Tipus: Article

Altres publicacions en: European Journal of Human Movement

Resum

Measuring flight time (Ft) on a contact mat is a common methodology to estimate vertical jump height. The aims of this study were: a-to analyze the influence of the contact mat technology on Ft, and b-to verify the validity and reliability of a new optoelectronic contact mat. Eighty-nine physical students performed 3 maximal jumps which were simultaneously registered by one force plate (FP) and two contact mats: ErgoJump Plus (EJ) and SportJump System Pro (SJ). They which were performed in a randomized order in the directions longitudinal and transversal with respect to PF. EJ underestimated Ft in 50.8 ms, while SJ underestimated it in 10.6 ms. Jump height did not affect these differences, although they increased when the jump direction was transversal in EJ. Correlation PF-EJ (r=0.6597) was lower than PFSJ one (r=0.9992). Coefficient of variation of EJ (6.61±4.81%*) was higher than SJ (1.21±0.81%) and PF (1.19±0.78%) ones. The contact mat technology (optoelectronics vs. mechanics) had a great influence on both Ft and vertical jump height; therefore these instruments should be validated before using them in scientific studies. The new system SJ that use laser technology, was valid and reliable to measure vertical jumps.

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