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José Pino-Ortega, Alejandro Hernández-Belmonte, Carlos D. Gómez-Carmona, Alejandro Bastida-Castillo, Javier García-Rubio and Sergio J. Ibáñez

inertial device is important, as the device records the acceleration of the body segment or object to which it is attached. 28 Different investigations have reported the body stability in the fourth lumbar vertebra (L4) as the most suitable location. 29 , 30 The placement of more than one device would be

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Hermann Zbinden-Foncea, Isabel Rada, Jesus Gomez, Marco Kokaly, Trent Stellingwerff, Louise Deldicque and Luis Peñailillo

acceleration was provided by Tesys 1000 Globus Ergo Software. The techniques and methods used to determine the other CMJ variables (Table  1 ) have been previously described. 22 Briefly, maximal values achieved during the eccentric phase (portion before takeoff in which the displacement is negative) and

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Mark G.L. Sayers and Stephen Bishop

vertical ball acceleration became negative. The first and second differentials of the medicine ball vertical displacement data were used to calculate the maximum ball velocity (Vel max ), time to Vel max , and maximum ball acceleration (Accel max ). Standard power-based strength quality measures were

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Mark Norman, Katelyn Esmonde and Courtney Szto

The past 15 years have seen the acceleration of two trends of great interest in the sociology of sport: the rapid growth and adoption of digital (sport) media ( Hutchins & Rowe, 2012 ) and, since Burawoy’s ( 2004 , 2005 ) influential calls for public sociology, a growing interest in public

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Matthew Pearce, Tom R.P. Bishop, Stephen Sharp, Kate Westgate, Michelle Venables, Nicholas J. Wareham and Søren Brage

; Wareham et al., 2003 ); and (4) mean wrist acceleration expressed in milli-g (ACC WRIST ) ( White et al., 2019 ). Target Criterion Values The gold-standard target criterion for assessing PAEE (kJ·day −1 ·kg −1 ) was the difference between total and resting energy expenditure as measured by the DLW method

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Jorge Carlos-Vivas, Elena Marín-Cascales, Tomás T. Freitas, Jorge Perez-Gomez and Pedro E. Alcaraz

, acceleration, agility) should not be overlooked to develop high-level players, even more so considering that recent evidence has shown that professional players are becoming faster. 1 , 2 Some studies have reported that both acceleration and maximum velocity ( V max ) can discriminate among players of

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Emma Fortune, Melissa M.B. Morrow and Kenton R. Kaufman

Repeated durations of dynamic activity with high ground reaction forces (GRFs) and loading rates (LRs) can be beneficial to bone health. To fully characterize dynamic activity in relation to bone health, field-based measurements of gait kinetics are desirable to assess free-living lower-extremity loading. The study aims were to determine correlations of peak vertical GRF and peak vertical LR with ankle peak vertical accelerations, and of peak resultant GRF and peak resultant LR with ankle peak resultant accelerations, and to compare them to correlations with tibia, thigh, and waist accelerations. GRF data were collected as ten healthy subjects (26 [19–34] years) performed 8–10 walking trials at velocities ranging from 0.19 to 3.05 m/s while wearing ankle, tibia, thigh, and waist accelerometers. While peak vertical accelerations of all locations were positively correlated with peak vertical GRF and LR (r 2 > .53, P < .001), ankle peak vertical accelerations were the most correlated (r 2 > .75, P < .001). All peak resultant accelerations were positively correlated with peak resultant GRF and LR (r 2 > .57, P < .001), with waist peak resultant acceleration being the most correlated (r 2 > .70, P < .001). The results suggest that ankle or waist accelerometers give the most accurate peak GRF and LR estimates and could be useful tools in relating physical activity to bone health.

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Andrea Nicolò, Marco Montini, Michele Girardi, Francesco Felici, Ilenia Bazzucchi and Massimo Sacchetti

quantify the physiological demand of the player performing movements, such as accelerations, decelerations, and directional changes, often at high intensities, which are crucial components of soccer matches. 2 The importance of quantifying the physiological demand of training relies on its fundamental role

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Hugh H.K. Fullagar, Robert McCunn and Andrew Murray

defensive positional groups, with WRs and DBs completing significantly greater total distance, high-intensity running, sprint distance, and high-intensity acceleration (positive and negative) efforts than other positions. These total distances reached ranges of 3013 m to 5530 m (655 m of high

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Marni J. Simpson, David G. Jenkins, Aaron T. Scanlan and Vincent G. Kelly

Monitoring athlete workloads during training and competition is common practice in many team sports. 1 External workloads are quantified using various objective measures such as power output, speed, accelerations (ACCEL), and distance, 1 whereas internal workloads are assessed primarily using