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Flavell CA, Sayers MG, Gordon SJ, et al. Mechanisms for triceps surae injury in high performance front row rugby union players: a kinematic analysis of scrummaging drills. J Sports Sci Med. 2013;12(1):159-64
Flavell, C. A., Sayers, M. G., Gordon, S. J., & Lee, J. B. (2013). Mechanisms for triceps surae injury in high performance front row rugby union players: a kinematic analysis of scrummaging drills. Journal of sports science & medicine, 12(1), 159-64.
Flavell, Carol A, et al. "Mechanisms for triceps surae injury in high performance front row rugby union players: a kinematic analysis of scrummaging drills." Journal of sports science & medicine vol. 12,1 (2013): 159-64.
Flavell CA, Sayers MG, Gordon SJ, Lee JB. Mechanisms for triceps surae injury in high performance front row rugby union players: a kinematic analysis of scrummaging drills. J Sports Sci Med. 2013 Mar 01;12(1):159-64. eCollection 2013. PMID: 24149740; PMCID: PMC3761761.
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J Sports Sci Med. 2013 Mar 01;12(1):159-64. eCollection 2013.

Mechanisms for triceps surae injury in high performance front row rugby union players: a kinematic analysis of scrummaging drills.

Journal of sports science & medicine

Carol A Flavell, Mark G L Sayers, Susan J Gordon, James B Lee

Affiliations

  1. School of Public Health, Tropical Medicine & Rehabilitation Sciences, James Cook University , Townsville, QLD, Australia.

PMID: 24149740 PMCID: PMC3761761

Abstract

The front row of a rugby union scrum consists of three players. The loose head prop, hooker and tight head prop. The objective of this study was to determine if known biomechanical risk factors for triceps surae muscle injury are exhibited in the lower limb of front row players during contested scrummaging. Eleven high performance front row rugby union players were landmarked bilaterally at the posterior superior iliac spine (PSIS), greater trochanter, lateral femoral epicondyle, midline of the calcaneus above the plantar aspect of the heel, midline lower leg 5cm and 20cm proximal to the lateral malleolus, at the axis of subtalar joint, lateral malleolus, and head of the fifth metatarsal. Players were video recorded during a series of 2 on 1 live scrummaging drills. Biomechanical three dimensional analysis identified large angular displacements, and increased peak velocities and accelerations at the ankle joint during attacking scrummaging drill techniques when in the stance phase of gait. This places the triceps surae as increased risk of injury and provides valuable information for training staff regarding injury prevention and scrum training practices for front row players. Key pointsFront rowers exhibited patterns of single leg weight bearing, in a position of greater ankle plantar flexion and knee extension at toe off during scrummaging, which is a risk position for TS injury.Front rowers also exhibited greater acceleration at the ankle, knee, and hip joints, and greater changes in ankle ROM from toe strike to toe off during attacking scrum drills.These reported accelerations and joint displacements may be risk factors for TS injury, as the ankle is accelerating into plantar flexion at final push off and the muscle is shortening from an elongated state.

Keywords: Rugby; athletes; injuries; kinematics

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