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Adam Jones, Chris Brogden, Richard Page, Ben Langley, and Matt Greig

measure of external loading in soccer. 17 , 18 Typically integrated within the GPS unit is a triaxial accelerometer, a microinertial sensor that provides a higher sampling frequency than the GPS unit. This microtechnology is used to establish a mechanical loading metric termed PlayerLoad, based on the

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Ross Armstrong, Christopher Michael Brogden, and Matt Greig

quantifies acceleration changes in anterior–posterior, medio-lateral, and vertical directions using a vector magnitude termed PlayerLoad measured as an arbitrary unit (a.u.). 15 Although the center of mass which approximates to the cervico-thoracic junction has been advocated as the optimal anatomical

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Adam Jones, Richard Page, Chris Brogden, Ben Langley, and Matt Greig

to ankle sprain injury. The mid-tibia site was selected as providing anatomical relevance to the ankle (given the prevalence of ankle sprain injury in soccer), without constraining movement. Furthermore, the PlayerLoad metric can be calculated in each axial plane, providing greater richness of data

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Matt Greig and Benjamin Child

lumbar segment kinetics during an 8-over bowling spell, 10 consistent with a recent study that quantified loading using a PlayerLoad metric derived from triaxial accelerometry. 11 Greig and Nagy 11 suggested that if workload restriction guidelines are too conservative, then they might actually impair

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Charlie Bowen, Kristian Weaver, Nicola Relph, and Matt Greig

measures of PlayerLoad based on the rate of change of acceleration. 15 , 22 Given the aims of the current study, the uniaxial measures of PlayerLoad (mediolateral, anteroposterior, and vertical) were also subdivided into directional indices, so as to consider medial and lateral for example. The medial

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Matt Greig, Hannah Emmerson, and John McCreadie

of 3 occasions for all participants prior to data collection. A single experimental testing session was conducted, with the independent variables defined as the drill type (from a battery of 5 drills) and GPS unit location (C7, tibia). The dependent variable was defined as the uniaxial PlayerLoad

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Catherine Mason and Matt Greig

habitual and common to all horse–rider pairs. The independent variables were the location of the GPS unit for quantifying loading and the dressage element. The dependent variables were the uniaxial PlayerLoad in each of the anteroposterior (AP), mediolateral (ML), and vertical (V) planes of movement

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Wayne Brown and Matt Greig

The epidemiology and etiology of ankle sprain injuries in soccer have been well described. Retrospective analysis of epidemiological data identified an English Premier League player sustaining a high lateral ankle sprain. GPS data collated during the training session in which the injury was sustained, and subsequent rehabilitation sessions, were analyzed to quantify uniaxial PlayerLoad metrics. The injured player revealed a 3:1 asymmetrical loading pattern in the mediolateral plane and multiaxial high loading events which might present the inciting event to injury. The high magnitude, asymmetrical and multiplanar loading is consistent with lateral ankle sprain etiology.

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Velocity in College Baseball Pitchers Osamu Yanagisawa * Kenta Wakamatsu * Hidenori Taniguchi * 1 11 2019 28 8 854 859 10.1123/jsr.2018-0122 jsr.2018-0122 The Efficacy of Lower-Limb Screening Tests in Predicting PlayerLoad Within a Professional Soccer Academy Charlie Bowen * Kristian Weaver