A proposed method for evaluating drop jump performance with one force platform

McMahon, JJ ORCID: https://orcid.org/0000-0001-9952-7846, Lake, JP ORCID: https://orcid.org/0000-0003-4381-0938, Stratford, C and Comfort, P ORCID: https://orcid.org/0000-0002-1131-8626 2021, 'A proposed method for evaluating drop jump performance with one force platform' , Biomechanics, 1 (2) , pp. 178-189.

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Abstract

The drop jump (DJ) is commonly utilised to assess athletes. The criterion two force platform (2FP) method of assessing DJ performance involves two adjacent force platforms, one for the box and one for the athlete to rebound from. Most researchers and practitioners only have access to one force platform (1FP) and they rarely account for the often considerable discrepancy between box height and drop height (DH). Therefore, this study aimed to determine the criterion validity of evaluating DJ performance with 1FP. Twenty-six young male sports students performed three DJs, from a 0.30 m and 0.40 m high box, on two adjacent force platforms. The DH, touchdown velocity and several performance variables were calculated using the 2FP and 1FP methods. Ordinary least-products regression identified no fixed or proportional bias between methods for any DJ variable. The mean DH was 10% lower than the 0.30 m box and 14% lower than the 0.40 m high box. This discrepancy highlights the importance of accounting for DH when conducting DJ assessments. In conclusion, the 1FP method of evaluating DJ performance is a valid alternative to the criterion 2FP method and could be embedded into automated force analysis software for researchers and practitioners to utilise.

Item Type:	Article
Additional Information:	** From MDPI via Jisc Publications Router ** Licence for this article: https://creativecommons.org/licenses/by/4.0/ **Journal IDs: eissn 2673-7078 **History: published 16-07-2021; accepted 12-07-2021
Schools:	Schools > School of Health and Society
Journal or Publication Title:	Biomechanics
Publisher:	MDPI
ISSN:	2673-7078
Related URLs:	Publication
SWORD Depositor:	Publications Router
Depositing User:	Publications Router
Date Deposited:	19 Jul 2021 15:31
Last Modified:	28 Aug 2021 10:33
URI:	http://usir.salford.ac.uk/id/eprint/61247

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