Force Duration and Magnitude During the Acceleration, Transition, and Maximum Speed Phases

Hans C. Von Lleres, Und Wilkau, Neil E. Bezodis, Jean-Benoit Morin, Gqareth Irwin, Ascott Simpson, and Ian N. Bezodis. 2020.The importance of duration and magnitude of force application to sprint performance during the initial acceleration, transition and maximal velocity phases.Journal of Sports Sciences, Volume 38, 2020 – Issue 20. ABSTRACT: Successful sprinting depends on covering a specific distance …

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Gluteus and Posterior Thigh Muscle Sizes in Sprinters

ABSTRACT: Muscle hypertrophy can occur non-uniformly in athletes who repetitively perform particular movements, presumably leading to a unique muscle size distribution along the length. The present study aimed to examine if sprinters have unique size distributions within the gluteus and posterior thigh muscles. Nineteen male sprinters and 20 untrained males participated in the present study. …

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Sugar and Artificial Sweetened Drinks and Cardiovascular Disease

Jiawei Yin, Yalun Zhu, Vasanti Malik, Xiaoqin Li, Xiaolin Peng,fang fang Shang, Zhilei Shan and Liegang Liu. 2020. Intake of Sugar-Sweetened and Low-Calorie Sweetened Beverages and Risk of Cardiovascular Disease: A Meta-Analysis and Systematic Review Advances in Nutrition, Volume 12, Issue 1, January 2021, Pages 89-101, https://doi.org/10.1093/advances/nmaa084ABSTRACTThe long-term associations between the consumption of sugar-sweetened beverages (SSBs) and low-calorie …

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Effects of Fatigue on Ground Reaction Force Abstract

Landing is a critical phase of movement for injury occurrence, in which lower limbs should be used equally to better absorb the shock. However, it has been suggested that fatigue can lead to the appearance of asymmetries. The aim of this study was to verify the acute and delayed effects of fatigue on the lower …

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Can the Workload–Injury Relationship be Moderated by Improved Strength, Speed and Repeated-Sprint Qualities?

Source: Shane Malone, BrianHughes, Dominic A.Doran, Kieran Collins, Tim J.Gabbett. 2019. Can the workload–injury relationship be moderated by improved strength, speed and repeated-sprint qualities?Journal of Science and Medicine in Sport.Volume 22, Issue 1, January, Pgs 29-34. ABSTRACT – Objectives: The aim of this study was to investigate potential moderators (i.e. lower body strength, repeated-sprint ability [RSA] and …

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Vertically- and Horizontally-Directed Muscle Power Exercises and Top-Level Sprint Performance

Abstract: The capacity to rapidly generate and apply a great amount of force seems to play a key role in sprint running. However, it has recently been shown that, for sprinters, the technical ability to effectively orient the force onto the ground is more important than its total amount. The force-vector theory has been proposed …

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Speed Bounding on Sloped Surfaces

 Abstract The purpose of this study was to determine whether there was a dose-response relationship between muscle activity during a propulsive phase of speed bounding on sloped surfaces in youth male sprinters. In a randomized, crossover counterbalanced design, 12 male sprinters (age: 15.75 [+ or -] 0.45 yrs, height: 1.72 [+ or -] 0.06 m), performed …

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Vertical Jump Metrics and Phases During a 60 m Sprint

Abstract – Purpose: This study aimed to investigate the relationships between vertical jump metrics and phases during a 60 m sprint. The variances in strength qualities between sprinters of different ability levels were also compared.Methods: Eighteen young male elite sprinters (age: 18.1 ± 1.3 years; stature: 1.72 ± 0.07 m; body mass: 66.3 ± 6.2 kg) were assessed for squat (SJ), countermovement (CMJ), drop (DJ), and standing …

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Ground Reaction Force, Ground Contact Time, GCT, Stride Rate, Flight Time and Braking Force During the Deceleration Phase of a Long Sprint

Abstract: This study aimed to elucidate changes in spatiotemporal and ground reaction force (GRF) variables during 90-m overground decelerated sprinting and determinants of the decrease in running speed. In 14 sub-elite male sprinters, a virtual 90-m sprint was reconstructed during which spatiotemporal and GRF variables were averaged for four steps in maximal speed (45.8-m mark) …

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Step Straightness and Sprint Performance

Abstract: A 100-m race is essentially running from point A to point B as quickly as possible, thus, deviations from a straight linear path may cause performance detriments. This study elucidates the importance of running straight during linear sprinting. A new descriptive characteristic of sprint running (step straightness) was defined and measured, representing the mediolateral …

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