An investigation into the physical determinants of change of direction speed

Jones, Paul ORCID: 0000-0002-3295-7670, Bampouras, Theodoros and Marrin, Kelly (2009) An investigation into the physical determinants of change of direction speed. Journal of Sports Medicine and Physical Fitness, 49 (1). pp. 97-104. ISSN 0022-4707

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Abstract

Change of direction speed (CODS) is an important attribute for many sports and is believed to be influenced by a variety of physical factors. However, there is a lack of consensus as to which physical attributes relate to CODS. The aim of this study was to examine the relationship of several physical attributes to CODS. Thirty-eight subjects (mean ± SD: age, 21.5 ± 3.8 years; height, 1.77 ± 0.07 m; mass, 77.5 ± 13.9 kg) undertook tests of speed, CODS, strength and power. Running speed was assessed via a 25m sprint with split times taken at 5, 20 and 25m. CODS was assessed by a 505-test, which involves measuring the time to complete a 5m out and back course. The strength and power tests included unilateral isokinetic concentric and eccentric knee extensor and flexor strength at 60o/s and bilateral leg press, countermovement and drop jumps. Pearson's product moment correlation and co-efficients of determination were used to explore relationships amongst all variables. Multiple regression was used to determine the combined effects of significantly correlated variables on CODS. Stepwise multiple regression revealed that running speed explained 58% of the variance in CODS (F1,33 = 45.796, p>0.001) with the addition of eccentric knee flexor strength raising the value to 67% (F1,32 = 8.781, p = 0.006). The results suggest that for basic improvements in CODS, athletes should seek to maximise their sprinting ability and enhance their eccentric knee flexor strength to allow effective neuromuscular control of the contact phase of the CODS task.

Item Type: Article
Additional Information: This is the authors version of the article published in Journal of Sports Medicine and Physical Fitness, Edizioni Minerva Medica.
Uncontrolled Keywords: agility, change of direction speed, speed, eccentric strength
Divisions: School of Sport and Biological Sciences > Sports and Sport Rehabilitation
Depositing User: Scott Wilson
Date Deposited: 26 Nov 2013 12:51
Last Modified: 04 Apr 2019 12:09
URI: http://ubir.bolton.ac.uk/id/eprint/410

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