Search Results

You are looking at 11 - 20 of 2,205 items for :

Clear All
Restricted access

Antonio Dello Iacono, Stephanie Valentin, Mark Sanderson and Israel Halperin

Sport scientists and applied practitioners regularly monitor and prescribe training programs based on assessments of force production tests. Two examples of such tests are the isometric midthigh pull (IMTP) and the isometric squat tests. 1 , 2 Both require subjects to stand on a force plate and

Restricted access

Pedro G. Morouço, Tiago M. Barbosa, Raul Arellano and João P. Vilas-Boas

swimming velocity, it is demonstrated that, for maximal swimming velocity, higher efficiency is obtained lowering the speed-specific drag. 3 Theoretically, intracyclic velocity variations are the result of intracyclic variations of the resultant horizontal force ( dF ) applied by the swimmer to the water

Restricted access

Alejandro Pérez-Castilla, Belén Feriche, Slobodan Jaric, Paulino Padial and Amador García-Ramos

The force platform is recognized as the ‘gold standard’ for testing vertical jumps. 1 – 3 The force platform estimates the velocity and power of the system center of mass from the directly recorded vertical ground reaction force data using the direct dynamic approach. Due to potential

Restricted access

Kajetan J. Słomka, Slobodan Jaric, Grzegorz Sobota, Ryszard Litkowycz, Tomasz Skowronek, Marian Rzepko and Grzegorz Juras

& Jaric, 2007 ) but also in routine testing of muscle mechanical capacities ( García-Ramos, Feriche, Pérez-Castilla, Padial, & Jaric, 2017 ; Markovic, Dizdar, Jukic, & Cardinale, 2004 ). A number of studies have assessed the force and power output produced in maximum vertical jumping either through

Restricted access

Dustin J. Oranchuk, Eric J. Drinkwater, Riki S. Lindsay, Eric R. Helms, Eric T. Harbour and Adam G. Storey

Optimizing muscle power and rapid force production is important for peak performance in several sports. 1 , 2 Weightlifting movements such as the power clean (PC) closely mirror many unloaded athletic movements as they are ballistic and biomechanically similar to jumping, sprinting, and change of

Restricted access

Katya Trousset, David Phillips and Andrew Karduna

position sense (JPS), and force sense. JPS and kinesthesia are the most commonly assessed subdivisions of proprioception. The focus on JPS and kinesthesia is emphasized by the absence of force sense-related protocols in a recent critical review of proprioceptive methods ( Han et al., 2015 ). This may be

Restricted access

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

scientific knowledge, it is evident that maximal relative strength, rate of force development, and peak power-generating capacity are the most important physical attributes to increase sprint performance. 6 A widely used approach to develop power output is called “optimal load” training, which consists of

Restricted access

Neil Chapman, John Whitting, Suzanne Broadbent, Zachary Crowley-McHattan and Rudi Meir

Muscle physiology is an area of great interest for scientists. The first half of the 20th century saw contributions to the body of knowledge of muscle mechanics by notable scientists such as Hill, Abbott, Fenn, Huxley, and Katz. 1 – 7 The generally accepted mechanism of active force production in

Restricted access

Christopher D. Ramos, Melvin Ramey, Rand R. Wilcox and Jill L. McNitt-Gray

braking) and vertical RFs for the takeoff phase for an example jumper. Initial leg angle is depicted for first image. Resultant RF is depicted for each image. Division of impact and postimpact intervals is labeled. BW indicated body weight; RF, reaction force. The aim of this study was to investigate the

Restricted access

David Giles, Joel B. Chidley, Nicola Taylor, Ollie Torr, Josh Hadley, Tom Randall and Simon Fryer

can be sustained decreases as a hyperbolic function of increasing power, speed, tension, or force (eg, power illustrated in Figure  1 ). 6 Consequently, performance and the point of exhaustion are highly predictable. When work data are plotted against time, it may be observed that power output falls