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Alyssa Evans, Gavin Q. Collins, Parker G. Rosquist, Noelle J. Tuttle, Steven J. Morrin, James B. Tracy, A. Jake Merrell, William F. Christensen, David T. Fullwood, Anton E. Bowden and Matthew K. Seeley

(breath by breath); and accelerations, measured via the shoe accelerometer (sampled at 16 Hz), were measured throughout the entire 50-minute collection period (the warm-up period and all five trials). The first two minutes of a change of speed, during which it is assumed that a steady state has not been

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Javier Yanci, Daniel Castillo, Aitor Iturricastillo, Tomás Urbán and Raúl Reina

hemiplegic) and FT5/6 players. It has been demonstrated in football that short-term actions are important for competing at a high standard of play, 11 , 12 but unfortunately, in the study by Boyd et al, 9 the high-intensity and short-duration actions (ie, accelerations, decelerations, and CODs) made by

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Anat V. Lubetzky, Bryan D. Hujsak, Gene Fu and Ken Perlin

performing the “park” scene ( Lubetzky et al., 2018 ). Root mean square acceleration (GRMS, mm/s 2 for translational movements and rad/s 2 for rotational movements) The square root of the average of the square of the acceleration over time. Peak frequency (Hz) ( Lubetzky-Vilnai, McCoy, Price, & Ciol, 2015

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Alison R. Oates, Aaron Awdhan, Catherine Arnold, Joyce Fung and Joel L. Lanovaz

shown that older adults are able to use haptic input from an anchor system (small weights on strings that are dragged along while walking) to reduce medial-lateral (ML) trunk acceleration ( Abud et al., 2015 ) and step speed while walking in tandem and on a balance beam ( da Costa, dos Santos, Mauerberg

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Lasse Ishøi, Per Aagaard, Mathias F. Nielsen, Kasper B. Thornton, Kasper K. Krommes, Per Hölmich and Kristian Thorborg

<10 m, 2 most goals are preceded by straight sprinting with near maximal-to-maximal velocity both by the scoring and assisting player. 3 Collectively, these observations indicate that both sprint acceleration performance and maximal sprint velocity are vital for football performance. Sprint

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Gerda Strutzenberger, Adam Brazil, Timothy Exell, Hans von Lieres und Wilkau, John D. Davies, Steffen Willwacher, Johannes Funken, Ralf Müller, Kai Heinrich, Hermann Schwameder, Wolfgang Potthast and Gareth Irwin

In sprint events, the early acceleration phase (defined here as the first and second steps from the blocks) is used to accelerate the center of mass (COM) horizontally and vertically. 1 , 2 In able-bodied (AB) elite athletes, the first and second steps account for approximately 5% of the total 100

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Rienk M.A. van der Slikke, Annemarie M.H. de Witte, Monique A.M. Berger, Daan J.J. Bregman and Dirk Jan H.E.J. Veeger

adding mass will increase the inertia, movements require more force, so it is expected to reduce mobility performance. If centrally placed, mass mainly affects forward acceleration, whereas distributed mass also affects maximal rotational speed and rotational acceleration given the increase in rotational

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Mohsen Shafizadeh, Nicola Theis and Keith Davids

, since the capacity of certain tissues to transmit and attenuate shock may be frequency dependent ( Smeathers, 1989 ). The frequency content and signal power of impact shock and tibia acceleration during stance phase of normal running are thought to be governed primarily by movement of the leg and center

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Heidi R. Thornton, André R. Nelson, Jace A. Delaney, Fabio R. Serpiello and Grant M. Duthie

Global positioning systems (GPS) are commonly used in team sports to quantify the movement patterns of athletes during training and competition. 1 GPS devices can provide a large number of movement variables including distance, speed, acceleration/deceleration, and metabolic power. 1 , 2 By

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Jordan L. Fox, Cody J. O’Grady and Aaron T. Scanlan

report inertial movement analysis (IMA) variables, such as accelerations, decelerations, changes of direction (COD), and jumps. These variables can represent physically demanding passages in training and games, potentially possessing different relationships with internal workload than an accumulated