Relationships among countermovement vertical jump performance metrics, strategy variables, and inter-limb asymmetry in females

Harry, JR; Barker, LA; Tinsley, GM; Krzyszkowski, J; Chowning, LD; McMahon, JJ; Lake, J

Abstract

Dependent variables commonly studied during countermovement vertical jump (CMVJ) tests largely stem from male-only studies despite females’distinct energy storage and reutilisation strategies. This could limit progress among females seeking increased CMVJ performance through targeted changes in certain variables. We explored relationships between CMVJ performance metrics (jump height, modified reactive strength index, jump power, and takeoff momentum) and (a) temporal and force application variables and (b) inter-limb force and yank (i.e., rate of force development) asymmetry in 31 recreationally active females. Participants performed eight CMVJs while ground reaction force (GRF) data were obtained. Pearson product-moment correlation coefficients assessed the strength and direction of the associations. Twenty-six significant relationships (r ≥ ±0.357; p < 0.05) were detected across the CMVJ performance variables. The significantly correlated variables were generally isolated to only one of the four performance metrics. Only the percentage of concentric phase inter-limb force asymmetry was significantly associated with CMVJ performance, specifically jump power and takeoff momentum. Coaches and physical performance professionals should be aware of popular strategy variables’ association or lack of association with commonly studied performance metrics when seeking to understand or improve specific CMVJ jumping abilities in females.

Citation

Harry, J., Barker, L., Tinsley, G., Krzyszkowski, J., Chowning, L., McMahon, J., & Lake, J. (2021). Relationships among countermovement vertical jump performance metrics, strategy variables, and inter-limb asymmetry in females. Sports Biomechanics, 1-19. https://doi.org/10.1080/14763141.2021.1908412

• Journal Article Type: Article
• Acceptance Date: Mar 19, 2021
• Online Publication Date: May 5, 2021
• Publication Date: May 5, 2021
• Deposit Date: Aug 12, 2021
• Journal: Sports Biomechanics
• Print ISSN: 1476-3141
• Electronic ISSN: 1752-6116
• Publisher: Routledge
• Pages: 1-19
• DOI: https://doi.org/10.1080/14763141.2021.1908412
• Publisher URL: https://doi.org/10.1080/14763141.2021.1908412
• Related Public URLs: https://www.tandfonline.com/loi/rspb20
• Additional Information: Additional Information : ** From Crossref journal articles via Jisc Publications Router **Journal IDs: pissn 1476-3141; eissn 1752-6116 **History: issued 05-05-2021; published_online 05-05-2021