Development and Reliability of Countermovement Jump Performance in Youth Athletes at Pre-, Circa- and Post-Peak Height Velocity

Bright, Thomas, Handford, Matthew J., Hughes, Jonathan D., Mundy, Peter D., Lake, Jason P. and Doggart, Lance (2023) Development and Reliability of Countermovement Jump Performance in Youth Athletes at Pre-, Circa- and Post-Peak Height Velocity. International Journal of Strength and Conditioning, 3 (1). ISSN 2634-2235

Preview

Text Development and Reliability of Countermovement Jump Performance in Youth Athletes at Pre-, Circa- and Post-Peak Height Velocity.pdf - Published Version Available under License Creative Commons Attribution. Download (454kB) | Preview

Abstract

The purpose of this study was to establish the intrasession reliability of various outcome, propulsion and braking phase countermovement jump (CMJ) variables and to compare the mean differences in youth athletes at different stages of maturity. Thirty male participants, aged 10-16 years, were grouped as either pre-, circa- or post-peak height velocity (PHV) according to their percentage of predicted adult height. All participants performed 3 CMJ trials on a force plate, sampling at 1000 Hz. A one-way ANOVA identified statistically significant differences between maturity groups for all CMJ variables (P<0.05) excluding propulsion peak rate of force development (RFD), braking peak velocity and countermovement depth. Post-hoc analysis revealed that the significant differences in CMJ variables were between the pre- to post- and circa- to post-PHV groups (P <0.05), with moderate to very large effect sizes. Relative and absolute reliability improved with maturity as the post-PHV group demonstrated superior reliability scores (ICC = 0.627-0.984; CV% = 3.25-21.55) compared to circa- (ICC = 0.570-0.998; CV% = 1.82-20.05) and pre-PHV groups (ICC= 0.851-0.988; CV% = 2.16-14.12). In summary, these results suggest that the biggest differences in CMJ performance are observed between preto post- and circa- to post-PHV, and that careful consideration is warranted when selecting variables in youth athletes at pre- and circa-PHV, given the lower reliability scores observed.

Item Type:	Article
Keywords:	countermovement jump, force plate, intrasession reliability, youth athlete, biological maturation
Depositing User:	Ms Raisa Burton
Date Deposited:	16 Mar 2023 14:38
Last Modified:	16 Mar 2023 14:38
URI:	https://marjon.repository.guildhe.ac.uk/id/eprint/17736
Related URLs:	https://journal ... rticle/view/149 (Publisher URL)

Actions (login required)

Edit Item