Movement variability within the kinetic and kinematic variables associated with male fast cricket bowlers’ techniques that influence lumbar spine injury.

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Author
Mepham, Tom
Date
2014Type
Thesis
Publisher
Cardiff Metropolitan University
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Show full item recordAbstract
Cricket fast bowling is a skill that is susceptible to the development of overuse related injury,
predominantly a stress fracture to the lumbar spine. Movement variability is a developing area
within biomechanics and has been related to overuse injury, though more knowledge is needed to
improve the understanding of this concept. The aim of this study was to investigate the
differences in movement variability within the kinetic and kinematic variables reported to
significantly increase the risk of lumbar back injury. Two male university cricketers (mean ± S.D.:
age 23 ± 2 years; stature 1.82 ± 0.03 m; body mass 83.5 ± 6.5 kg) performed twelve deliveries at
match intensity within which their technique was captured using CODAmotion (200 Hz), a Kistler
force platform (1000 Hz) and a high definition video camera (50 Hz). Seventeen active CODA
markers were located on body landmarks to quantify motion data through the delivery stride.
Both participants were classified as mixed action bowlers. Pearsons’ product-moment correlation
coefficients (r) showed that participant 1 (r = 0.882, P < 0.01) and 2 (r = 0.688, P< 0.05) showed a
larger shoulder angle at back foot contact significantly correlated with increased shoulder counterrotation
through the delivery stride. Therefore, it would be advantageous to adopt a more side-on
shoulder alignment in order to reduce risk of injury. The contralateral side-flexion angle for
participant 1 (29.5 ± 1.0°) and 2 (25.8 ± 0.6°) showed minimal variability that suggested control in
the movement in which greater variation occurred prior to and at the point of peak contralateral
side-flexion, a positive trait previously hypothesised to reduce variability-overuse injury. Further
knowledge is needed to ascertain whether movement variability has a significant effect on injury
mechanisms and also to establish if variability is the cause or effect of injury.
Description
DEGREE OF BACHELOR OF SCIENCE (HONOURS)
SPORT AND EXERCISE SCIENCE
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