The Deceleration Deficit: A Novel Field-Based Method to Quantify Deceleration During Change of Direction Performance

Clarke, Richard and Read, Paul J. and De Ste Croix, Mark B.A. and Hughes, Jonathan D. (2020) The Deceleration Deficit: A Novel Field-Based Method to Quantify Deceleration During Change of Direction Performance. Journal of Strength and Conditioning Research. ISSN 1064-8011

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Abstract

The study investigated the relationship between linear and change of direction (COD) speed performance components and the individual differences between deceleration deficit (DD) and COD deficit (CODD). Thirty-six subjects (mean ±SD: age = 20.3 ± 2.9 years; stature = 175.2 ± 7.7 cm; body mass = 78.0 ± 16.7 kg) completed three trials of a 505 test in both turning directions (dominant (D); non-dominant (ND)) and three 15m linear sprints. DD was calculated via the 15m approach in the 505 test, minus the athlete’s linear 15m sprint time. To compare individuals CODD and DD, z-scores were calculated, and moderate worthwhile changes (MWC) were identified between these deficit z-scores. Significant correlations were identified between linear sprints and 505 time (D: r = 0.71, 0.74; P < 0.01. ND: r = 0.76, 0.75; P < 0.01) for 10m and 15m sprint respectively, and between 505 performance and CODD (D: r = 0.74; P < 0.01. ND: r = 0.77; P < 0.01) and DD (D: r = 0.41, P < 0.05. ND: r = 0.44, P < 0.01). DD was significantly related to CODD (D: r = 0.59; P < 0.01. ND: r = 0.62; P < 0.01); however, 78% of subjects demonstrated differences between these deficit measures greater than an MWC. In conclusion, linear speed has the strongest significant relationship with 505 performance. DD could provide a more isolated construct than CODD which may be related to an athlete’s deceleration capabilities.

Item Type: Article
Identification Number: https://doi.org/10.1519/JSC.0000000000003856
Date: 9 October 2020
Uncontrolled Keywords: Agility; Deceleration; Velocity; Braking; Multi-Directional
Subjects: C600 Sports Science
Divisions: Faculty of Health, Education and Life Sciences > School of Health Sciences
Depositing User: Richard Clarke
Date Deposited: 14 Oct 2020 09:32
Last Modified: 15 Oct 2020 15:24
URI: http://www.open-access.bcu.ac.uk/id/eprint/10101

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