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Ignacio Perez-Pozuelo, Thomas White, Kate Westgate, Katrien Wijndaele, Nicholas J. Wareham and Soren Brage

to the description of orientation-related measures of human behavior using wrist-worn accelerometry, although they have been used in thigh-worn activity monitoring ( Steeves et al., 2015 ). Pitch and roll angles are examples of well-defined, biomechanically relevant, and easy-to-interpret signal

Open access

Martin Buchheit and Ben Michael Simpson

With the ongoing development of microtechnology, player tracking has become one of the most important components of load monitoring in team sports. The 3 main objectives of player tracking are better understanding of practice (provide an objective, a posteriori evaluation of external load and locomotor demands of any given session or match), optimization of training-load patterns at the team level, and decision making on individual players’ training programs to improve performance and prevent injuries (eg, top-up training vs unloading sequences, return to play progression). This paper discusses the basics of a simple tracking approach and the need to integrate multiple systems. The limitations of some of the most used variables in the field (including metabolic-power measures) are debated, and innovative and potentially new powerful variables are presented. The foundations of a successful player-monitoring system are probably laid on the pitch first, in the way practitioners collect their own tracking data, given the limitations of each variable, and how they report and use all this information, rather than in the technology and the variables per se. Overall, the decision to use any tracking technology or new variable should always be considered with a cost/benefit approach (ie, cost, ease of use, portability, manpower/ability to affect the training program).

Open access

Yolanda Demetriou, Antje Hebestreit, Anne K. Reimers, Annegret Schlund, Claudia Niessner, Steffen Schmidt, Jonas David Finger, Michael Mutz, Klaus Völker, Lutz Vogt, Alexander Woll and Jens Bucksch

daily PA, such as bicycle lanes, inner-city roads with 30 km/h speed limit, public playgrounds, parks and soccer pitches. The majority (75%) of parents state that their children can play outside without supervision. 8 Government INC Many interventions exist and have been implemented to promote PA in

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James A. Ashton-Miller and Ronald F. Zernicke

. If corroborated by others, its significance is that coaches, trainers, and athletes will know that the ACL has a material fatigue limit in terms of how many high-loading cycles it can withstand before failure. This is like the Little League Pitch Count in baseball that is used to protect young

Open access

Alon Eliakim, Bareket Falk, Neil Armstrong, Fátima Baptista, David G. Behm, Nitzan Dror, Avery D. Faigenbaum, Kathleen F. Janz, Jaak Jürimäe, Amanda L. McGowan, Dan Nemet, Paolo T. Pianosi, Matthew B. Pontifex, Shlomit Radom-Aizik, Thomas Rowland and Alex V. Rowlands

adult stature participated in a tournament. Players competed in three 11 vs 11 games on a full size pitch with 25-min halves. Sixteen players participated in four 15-min focus groups and were asked to describe their experiences of participating in the bio-banded tournament in comparison to age group

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Recep Gorgulu, Andrew Cooke and Tim Woodman

that experienced baseball pitchers displayed an anxiety-induced increase in the number of balls pitched to an ironic (avoid) zone, while the kinematics of their technique remained stable. This finding supports an ironic processes account of performance breakdown over the explanations offered by self