Biomechanical effects of a 6-week change of direction speed and technique modification intervention : implications for change of direction side step performance

Dos'Santos, T, Thomas, C, Comfort, P ORCID: https://orcid.org/0000-0002-1131-8626 and Jones, PA ORCID: https://orcid.org/0000-0002-3295-7670 2021, 'Biomechanical effects of a 6-week change of direction speed and technique modification intervention : implications for change of direction side step performance' , Journal of Strength and Conditioning Research .

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Abstract

The aim of this study was to evaluate the biomechanical effects of change of direction (COD) speed and technique modification training on COD performance (completion time, ground contact time [GCT], and exit velocity) during 45° (CUT45) and 90° (CUT90) side step cutting. A nonrandomized, controlled 6-week intervention study was administrated. Fifteen male, multidirectional, sport athletes (age, 23.5 ± 5.2 years; height, 1.80 ± 0.05 m; mass, 81.6 ± 11.4 kg) formed the intervention group (IG) who participated in two 30-minute COD speed and technique modification sessions per week, whereas 12 male, multidirectional, sport athletes (age, 22.2 ± 5.0 years; height, 1.76 ± 0.08 m; mass, 72.7 ± 12.4 kg) formed the control group (CG) and continued their normal training. All subjects performed 6 trials of the CUT45 and CUT90 task whereby pre-to-post intervention changes in lower-limb and trunk kinetics and kinematics were evaluated using 3-dimensional motion and ground reaction force analyses. Two-way mixed analysis of variances revealed significant main effects for time (pre-to-post changes) for CUT45 completion time, exit velocity, and CUT90 completion time (p ≤ 0.045; η2 = 0.152-0.539), and significant interaction effects of time and group were observed for CUT45 completion time, GCT, exit velocity, and CUT90 completion time (p ≤ 0.010; η2 = 0.239-0.483), with the IG displaying superior performance postintervention compared with the CG (p ≤ 0.109; g = 0.83-1.35). Improvements in cutting performance were moderately to very largely associated (p ≤ 0.078; r or ρ = 0.469-0.846) with increased velocity profiles, increased propulsive forces over shorter GCTs, and decreased knee flexion. Change of direction speed and technique modification is a simple, effective training method requiring minimal equipment that can enhance COD performance, which practitioners should consider incorporating into their pitch- or court-based training programs. [Abstract copyright: Copyright © 2021 by the National Strength & Conditioning Association.]

Item Type: Article
Additional Information: ** From PubMed via Jisc Publications Router **Journal IDs: eissn 1533-4287 **Article IDs: pubmed: 33651735; pii: 00124278-900000000-94051 **History: published 02-03-2021
Schools: Schools > School of Health and Society
Journal or Publication Title: Journal of Strength and Conditioning Research
Publisher: Lippincott, Williams & Wilkins
ISSN: 1064-8011
Related URLs:
SWORD Depositor: Publications Router
Depositing User: Publications Router
Date Deposited: 04 Jun 2021 10:27
Last Modified: 04 Jun 2021 10:27
URI: http://usir.salford.ac.uk/id/eprint/59851

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