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Robert W. Motl and Rachel Bollaert

an estimate of time spent sitting, expressed as minutes or hours per day. Devices provide objective information about sedentary behaviors in MS ( Sasaki, Sandroff, Bamman, & Motl, 2017 ). Motion sensors such as accelerometers objectively measure acceleration of the body over long periods of time

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Alan L. Smith and Daniel Gould

helps stimulate an acceleration of scholarship on the topic over the coming decades. In the following sections, we offer a brief overview of the origins and mission of the ISYS, emphasizing its role in identifying critical youth sport issues and using sport-science research to address those issues. We

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Cheryl M. Glazebrook

, 15 ( 2 ), 117 – 137 . doi:10.1080/17408980902791586 10.1080/17408980902791586 Schmidt , R.A. ( 1975 ). A schema theory of discrete motor skill learning . Psychological Review, 82 ( 4 ), 225 – 260 . doi:10.1037/h0076770 10.1037/h0076770 Schmidt , R.A. ( 1989 ). Unintended acceleration: A

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Gregory J. Welk

, assessment procedures typically necessitate a calibration process to facilitate scoring and interpretation of the information that is collected from various instruments. For example, accelerometry-based activity monitors produce raw indicators of movement (based on acceleration) that need to be converted

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Mark Lowes and Christopher Robillard

.4.446 Hutchins , B. ( 2011 ). The acceleration of media sport culture . Information, Communication & Society, 14 ( 2 ), 237 – 257 . doi:10.1080/1369118X.2010.508534 10.1080/1369118X.2010.508534 Lowes , M. ( 1997 ). Sports page: A case study in the manufacture of sports news for the daily press

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Richard B. Kreider

technique, reactive, active acceleration, frequency, complex speed drills), agility training (e.g., perceptual/decision-making drills, technical-agility drills), plyometrics (e.g., exercises with eccentric, amortization/transition, and concentric contraction phases), deceleration and jump training (e

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Agnes Kovacs, Tamas Doczi and Dunja Antunovic

.1123/ijsc.3.4.454 10.1123/ijsc.3.4.454 Hutchins , B. ( 2011 ). The acceleration of media sport culture: Twitter, telepresence and online messaging . Information, Communication & Society, 14 ( 2 ), 237 – 257 . doi:10.1080/1369118X.2010.508534 10.1080/1369118X.2010.508534 Hutchins , B. , & Boyle , R

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Michelle Hayes, Kevin Filo, Caroline Riot and Andrea Geurin

): A case study examining PGA Tour golfers’ Twitter use during the Masters . International Journal of Sport Communication, 7 ( 2 ), 245 – 260 . doi:10.1123/IJSC.2013-0130 10.1123/IJSC.2013-0130 Hutchins , B. ( 2011 ). The acceleration of media sport culture: Twitter, telepresence and online

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Elizabeth B. Delia

. doi:10.1123/jsm.21.3.319 10.1123/jsm.21.3.319 Hogg , M.A. , & Abrams , D. ( 1988 ). Social identifications: A social psychology of intergroup relations and group processes . New York, NY : Routledge . Hutchins , B. ( 2011 ). The acceleration of media sport culture . Information

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Roger Baines

content analysis of athlete tweets . International Journal of Sport Communication, 3 ( 4 ), 454 – 471 . doi:10.1123/ijsc.3.4.454 10.1123/ijsc.3.4.454 Hutchins , B. ( 2010 ). The acceleration of media sport culture . Information, Communication & Society, 14 ( 2 ), 237