Force plate-derived countermovement jump normative data and benchmarks for professional Rugby League players

McMahon, JJ ORCID: https://orcid.org/0000-0001-9952-7846, Ripley, NJ and Comfort, P ORCID: https://orcid.org/0000-0002-1131-8626 2022, 'Force plate-derived countermovement jump normative data and benchmarks for professional Rugby League players' , Sensors, 22 (22) , p. 8669.

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Abstract

The countermovement jump (CMJ) is an important test in rugby league (RL), and the force plate is the recommended assessment device, as it permits the calculation of several variables that explain jump strategy, alongside jump height. The purpose of this study was to produce normative CMJ data and objective benchmarks for professional RL forwards and backs. Normative data for jump height, modified reactive strength index, and jump momentum are provided for 121 professional RL players (66 forwards and 55 backs) who completed CMJ testing on a portable force plate during preseason training. Standardized T-scores (scaled from 0 to 100) were calculated from the respective positional group mean and standard deviation to create CMJ performance bands that were combined with a qualitative description (ranging from extremely poor to excellent) and a traffic light system to facilitate data interpretation and objective benchmark setting by RL practitioners. The jump height and modified reactive strength index benchmarks were larger for the lighter backs, whereas the jump momentum benchmarks were larger for the heavier forwards. The presented novel approach to compiling and presenting normative data and objective benchmarks may also be applied to other data (i.e., from other tests or devices) and populations.

Item Type: Article
Schools: Schools > School of Health and Society > Centre for Health Sciences Research
Journal or Publication Title: Sensors
Publisher: MDPI
ISSN: 1424-8220
Depositing User: Dr John J McMahon
Date Deposited: 10 Nov 2022 09:41
Last Modified: 10 Nov 2022 09:45
URI: https://usir.salford.ac.uk/id/eprint/65561

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