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Karin Fischer-Sonderegger, Wolfgang Taube, Martin Rumo and Markus Tschopp

distance a player covered in different speed zones. 4 However, several studies have pointed out that speed-based indicators do not reveal the complete picture of physical load in soccer. 5 – 11 Due to the fact that efforts with high accelerations requires a greater amount of energy and a higher muscular

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Ryu Nagahara, Yohei Takai, Miki Haramura, Mirai Mizutani, Akifumi Matsuo, Hiroaki Kanehisa and Tetsuo Fukunaga

in SL is caused by increases in height and/or relative vertical impulse. GRFs during the acceleration phase of sprinting largely change as propulsive forces decrease, and braking and vertical forces increase ( 14 ). Moreover, the difference in maximal speed results from the preceding difference in

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Ted Polglaze and Matthias W. Hoppe

demands of brief, nonsteady-state—and often high-intensity—accelerations cannot be directly measured. However, this is possible for steady-state incline running, where energy cost increases with slope but, as per running on level ground, is independent of speed at a given slope. 5 Accordingly

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Chadwick Debison-Larabie, Bernadette A. Murphy and Michael W.R. Holmes

-specific psychosocial factors such as the underreporting of concussions in males may contribute to these differences, 3 but there has been limited attention given to the neurophysiological and biomechanical aspects of head acceleration between sexes 4 , 5 in hockey players. Furthermore, most work involving simulated

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Christian A. Clermont, Andrew J. Pohl and Reed Ferber

environment and may not reflect true adaptations that occur in real-world settings. With the use of wearable sensors, on the other hand, fatigue-induced changes in running biomechanics can now be measured in more ecological settings by quantifying alterations in center of mass (CoM) acceleration patterns

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John M. Rosene, Christian Merritt, Nick R. Wirth and Daniel Nguyen

magnitude alone, as measured in multiple acceleration of gravity (G), has been reported to be an inconsistent measurement of the severity of injury. 2 , 3 Previous researchers have hypothesized that as athletes are getting bigger, stronger, and faster, the risk of concussion may increase as well. 4 While

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Carl G. Mattacola, Carolina Quintana, Jed Crots, Kimberly I. Tumlin and Stephanie Bonin

-absorbing liner is usually made from expanded polystyrene that crushes and cracks during an impact and then partially rebounds after the impact. 8 The liner protects the head by increasing the distance and duration over which the head decelerates, decreasing the peak force and acceleration experienced by the

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Aaron T. Scanlan, Robert Stanton, Charli Sargent, Cody O’Grady, Michele Lastella and Jordan L. Fox

max ]) 4 demands while undertaking extensive physical requirements, including jumping (1.1 per min), accelerations (∼60), and change-of-direction movements (∼180) during game-play. 6 Despite the growing body of descriptive evidence quantifying game demands in basketball, the impact of overtime

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Tsuyoshi Saida, Masayuki Kawada, Daijiro Kuroki, Yuki Nakai, Takasuke Miyazaki, Ryoji Kiyama and Yasuhiro Tsuneyoshi

, the autocorrelation function of the acceleration of neck and lumbar regions would be useful to assess the symmetry and regularity of gait pre- and post-TKA. The purpose of this study was to clarify the effects of TKA in patients with knee OA on trunk fluctuation, symmetry, and regularity of gait by

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Jonathan M. Williams, Michael Gara and Carol Clark

back or sacral area have high reported correlation with force plate measures of balance. 3 , 7 , 8 Although it is acknowledged that the 2 measurement techniques measure subtly different constructs of balance (sway of center of pressure vs sacral acceleration), their relationship suggests that