Familiarisation, reproducibility and agreement analysis of vertical jump height with countermovement on the force platform in young men

Abstract

The aim of the present study was to analyse the familiarisation, reliability and agreement analysis of the vertical jump with counter movement obtained on the force platform. Twenty-three adult men (24.0 ± 4.8 years) participated in the study. In the first session, three familiarisation jumps, and three test jumps (measure 1) were performed. In the second session, only three test jumps were performed (measure 2). The vertical jump height values did not show statistically significant differences between familiarisation, measures 1 and 2 (p > 0.05). The vertical jump height showed higher reliability and sensitivity between measurements 1 and 2 (CV = 5.0%; TE = 1.4 cm; MMD = 3.9 cm) than between familiarisation and measure 1 (CV = 5.8%; TE = 1.6 cm; MMD = 4.5 cm). The Bland and Altman plot showed a bias of 0.9 ± 2.3 cm (-5.4 – 3.6 cm) between familiarisation and measure 1 and a bias of 0.1 ± 1.9 (-3.6 – 3.8 cm) between measures 1 and 2. The findings of the present study showed that familiarisation did not influence vertical jump height. However, a better sensitivity of the measurement was verified when familiarisation procedures were performed.