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Open AccessFeature PaperArticle

The Role of Eccentric Strength in 180° Turns in Female Soccer Players

1
Directorate of Sport, Exercise & Physiotherapy, University of Salford, Salford, Greater Manchester M6 6PU, UK
2
Aspire Academy, Doha, Qatar
*
Author to whom correspondence should be addressed.
Academic Editor: Michael Duncan
Sports 2017, 5(2), 42; https://doi.org/10.3390/sports5020042
Received: 19 May 2017 / Revised: 13 June 2017 / Accepted: 15 June 2017 / Published: 17 June 2017
(This article belongs to the Special Issue The Role of Strength on Performance in Athletic Tasks)
Previous studies have reported an association between eccentric strength (ECC-STR) and change of direction (COD) ability. Little is known about how ECC-STR facilitates COD maneuvers. The aim of this study was to examine the role of ECC-STR during a 180° COD task in 18 female soccer players. Each player performed six trials of a 180° COD task whereby three-dimensional motion data from 10 Qualisys Pro-Reflex infrared cameras (240 Hz) and ground reaction forces (GRFs) from two AMTI force platforms (1200 Hz) were collected. Relative eccentric knee extensor (ECC-EXT) and flexor (ECC-FLEX) peak torque was collected from both limbs at 60°·s−1 using a Kin Com isokinetic dynamometer. Large correlations were revealed between COD performance (time to complete 5 m approach, 180° turn, 5 m return) and ECC-EXT (R = −0.674) and ECC-FLEX (R = −0.603). Moderate to large correlations were observed between approach velocity (AV) and COD performance (R = −0.484) and ECC-EXT (R = 0.724). Stronger participants (n = 9) recorded significantly (p < 0.05) faster AV (4.01 ± 0.18 vs. 3.74 ± 0.24 m·s−1, d = 1.27) and a greater reduction in velocity (−1.55 ± 0.17 vs. −1.37 ± 0.21 m·s−1, d = −0.94) during penultimate contact than weaker (n = 9) subjects. Greater ECC-STR is associated with faster COD performance in female soccer players, as stronger players are better able to decelerate during penultimate contact from faster approach velocities. View Full-Text
Keywords: change of direction ability; deceleration; velocity; penultimate contact; isokinetic change of direction ability; deceleration; velocity; penultimate contact; isokinetic
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MDPI and ACS Style

Jones, P.A.; Thomas, C.; Dos’Santos, T.; McMahon, J.J.; Graham-Smith, P. The Role of Eccentric Strength in 180° Turns in Female Soccer Players. Sports 2017, 5, 42.

AMA Style

Jones PA, Thomas C, Dos’Santos T, McMahon JJ, Graham-Smith P. The Role of Eccentric Strength in 180° Turns in Female Soccer Players. Sports. 2017; 5(2):42.

Chicago/Turabian Style

Jones, Paul A.; Thomas, Christopher; Dos’Santos, Thomas; McMahon, John J.; Graham-Smith, Philip. 2017. "The Role of Eccentric Strength in 180° Turns in Female Soccer Players" Sports 5, no. 2: 42.

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