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Courteney L. Benjamin, William M. Adams, Ryan M. Curtis, Yasuki Sekiguchi, Gabrielle E.W. Giersch and Douglas J. Casa

rate and global positioning system device (Polar Electro M400, Kempele, Finland) in which players were instructed to log all coach-initiated team activity throughout the competitive season. Data Analyses A power analysis was completed post-hoc for one of the variables of interest, sleep quality, for a

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Brennan Petersen, Mark Eys, Kody Watson and M. Blair Evans

.e., cross-sectional) 40 34 6  2 19 15 4  3+ 7 5 2 Data-collection approach  questionnaire 62 53 9  observation 4 1 3  interview (as part of a mixed-method study) 3 3 0  video observation 3 2 1  GPS (global positioning system) position tracking 1 1 0 Group dynamics construct (and general description)  cohesion

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Kimberly A. Clevenger, Michael J. Wierenga, Cheryl A. Howe and Karin A. Pfeiffer

used global positioning system (GPS) units in conjunction with heart-rate monitoring (n = 2) or accelerometry (n = 3), and one experimental study in children used accelerometry alone. Of the four studies that used accelerometry, none were in preschool samples. One study of children used a modified

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Cheryl M. Glazebrook

activity interventions, provide feedback, and conduct affordable portable movement assessment ( Bort-Roig et al., 2014 ; del Rosario, Redmond, & Lovell, 2015 ; Lathia et al., 2013 ). A key technological feature of any cellphone—the global positioning system (GPS)—was made possible by a group of curious