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Spinal muscle activity in simulated rugby union scrummaging is affected by different engagement conditions


Reference:

Cazzola, D., Stone, B., Holsgrove, T., Trewartha, G. and Preatoni, E., 2015. Spinal muscle activity in simulated rugby union scrummaging is affected by different engagement conditions. Scandinavian Journal of Medicine and Science in Sports, 26 (4), pp. 432-440.

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Official URL:

http://dx.doi.org/10.1111/sms.12446

Abstract

Biomechanical studies of rugby union scrummaging have focused on kinetic and kinematic analyses, while muscle activation strategies employed by front-row players during scrummaging are still unknown. The aim of the current study was to investigate the activity of spinal muscles during machine and live scrums. Nine male front-row forwards scrummaged as individuals against a scrum machine under “crouch-touch-set” and “crouch-bind-set” conditions, and against a two-player opposition in a simulated live condition. Muscle activities of the sternocleidomastoid, upper trapezius, and erector spinae were measured over the pre-engagement, engagement, and sustained-push phases. The “crouch-bind-set” condition increased muscle activity of the upper trapezius and sternocleidomastoid before and during the engagement phase in machine scrummaging. During the sustained-push phase, live scrummaging generated higher activities of the erector spinae than either machine conditions. These results suggest that the pre-bind, prior to engagement, may effectively prepare the cervical spine by stiffening joints before the impact phase. Additionally, machine scrummaging does not replicate the muscular demands of live scrummaging for the erector spinae, and for this reason, we advise rugby union forwards to ensure scrummaging is practiced in live situations to improve the specificity of their neuromuscular activation strategies in relation to resisting external loads.

Details

Item Type Articles
CreatorsCazzola, D., Stone, B., Holsgrove, T., Trewartha, G. and Preatoni, E.
DOI10.1111/sms.12446
Uncontrolled Keywordsbiomechanics ,sports injury, sports performance ,cervical spine,scrummaging technique ,lumbar spine
DepartmentsFaculty of Humanities & Social Sciences > Health
Research CentresEPSRC Centre for Doctoral Training in Statistical Mathematics (SAMBa)
RefereedYes
StatusPublished
ID Code44141

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