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Título
Reliability of measurements during countermovement jump assessments: Analysis of performance across subphases
Autor
Facultad/Centro
Área de conocimiento
Título de la revista
Cogent Social Sciences
Número de la revista
1
Cita Bibliográfica
Warr, D. M., Pablos, C., Sánchez-Alarcos, J. V., Torres, V., Izquierdo, J. M., & Carlos Redondo, J. (2020). Reliability of measurements during countermovement jump assessments: Analysis of performance across subphases. Cogent Social Sciences, 6(1). https://doi.org/10.1080/23311886.2020.1843835
Editorial
Taylor and Francis
Fecha
2020
Resumen
The aim of this study was to examine the reliability of performance measures
in the different phases and sub-phases of the countermovement jump (CMJ). Seventeen
male athletes competing at a regional level completed 204 valid trails consisting of the
execution of maximal hands-on-waist CMJs performed on a force platform. The vertical
ground reaction force (VGRF) data obtained at a sampling frequency of 1000 Hz were
used to calculate performance-derived variables and determine key points and jump subphases.
The relative reliability of 92 variables was assessed using the intraclass correlation
coefficient (ICC) from a two-way mixed effects model analyzing the time, force,
power, velocity, and displacement variables across the different phases and sub-phases
of the jump. The contact phase serves as a consistent approach (range ICC = .806 to .987),
providing reliable information about the jump as a unit. Mean force was the only measure
that presented high reliable values throughout all sub-phases (ICC = .931 to .963). The
power and velocity variables were reliable from the point where force turned into an
increasing value while displacement from minimum velocity was reached. Net impulse
and ratios of force development showed high and acceptable values, respectively. Timerelated
variables were the least reliable measures (ICC = .587 to .720), showing acceptable
reliability only in the contact phase and propulsive sub-phase. In conclusion, VGRF
may be used to determine specific parameters during CMJ execution, although the
appropriate variables should be selected based on acceptable levels of reliability.
Materia
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SI
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