Countermovement jump force−time curve analysis between strength-matched male and female soccer players

Thomas, C; Jones, PA; Dos’Santos, T

Abstract

The purpose of this study was to compare countermovement jump force−time measures between strength-matched male and female soccer players. Males (n = 11) and females (n = 11) were strength-matched via isometric mid-thigh pull testing, whereby peak force values were normalised to body mass. Subjects performed three maximal-effort countermovement jumps (CMJs) on a force platform from which a range of kinetic and kinematic variables were calculated via forward dynamics. Thereafter, differences in gross measures were examined via independent t-tests, while differences in force−, power−, velocity−, and displacement−time curves throughout the entire CMJ were analysed using statistical parametric mapping (SPM). Jump height, reactive strength index modified, propulsion mean force, propulsion impulse, and propulsion mean velocity were all greater for males (d = 1.50 to 3.07). Relative force− and velocity−time curves were greater for males at 86−93% (latter half of the concentric phase) and 85−100% (latter half of the concentric phase) of normalized movement time, respectively. Time to take-off, braking phase time, braking mean velocity and impulse, propulsion phase time and centre of mass displacement were similar between males and females (d = −0.23 to 0.97). This research demonstrates the strength of SPM to identify changes between entire force-time curves. Continued development and the use of SPM analysis could present the opportunity for a refined comparison of strength-matched male and female CMJ performance with the analysis of entire force−time curves.

Citation

Thomas, C., Jones, P., & Dos’Santos, T. (2022). Countermovement jump force−time curve analysis between strength-matched male and female soccer players. International Journal of Environmental Research and Public Health, 19(6), e3352. https://doi.org/10.3390/ijerph19063352

• Journal Article Type: Article
• Acceptance Date: Mar 3, 2022
• Publication Date: Mar 12, 2022
• Deposit Date: Mar 14, 2022
• Publicly Available Date: Mar 14, 2022
• Journal: International Journal of Environmental Research and Public Health
• Publisher: MDPI
• Volume: 19
• Issue: 6
• Pages: e3352
• DOI: https://doi.org/10.3390/ijerph19063352
• Publisher URL: https://doi.org/10.3390/ijerph19063352
• Related Public URLs: https://www.mdpi.com/journal/ijerph
• Additional Information: Additional Information : ** From MDPI via Jisc Publications Router ** Licence for this article: https://creativecommons.org/licenses/by/4.0/ **Journal IDs: eissn 1660-4601 **History: published 12-03-2022; accepted 03-03-2022; Access Information : This article belongs to the Special Issue Strength and Conditioning for Sports Performance, Injury Mitigation, and Public Health (https://www.mdpi.com/journal/ijerph/special_issues/strength_conditioning_sports_performance)