Lynne

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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Purpose: To examine the changes in resisted sprint performance and kinematics provoked by different sled loads in elite sprinters and rugby players.  Methods: Eight elite male sprinters and 10 rugby union players performed 20-m sprints under 3 loading conditions (0%, 20%, and 60% body mass [BM]). Sprint time was measured in 0 to 5, 5 to 10, …

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Abstract: Overspeed-based training is widely used to improve athletes’ maximum running speed and towing systems are one of the most frequently employed methods for this purpose. However, the effectiveness of this modality has not been thoroughly determined. This review analyzes the acute effects of overspeed conditions with towing systems in sprinters. The articles were searched, …

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Abstract: Football players must be physically fit, technically adept, strategically well-equipped, and mentally prepared to withstand the pressures of the game. Among those essential components, physical fitness is the basis. So, coaches implemented aerobics, strength, and power training for large muscle groups. However, the core muscles, which assist maintain balance, transform stored energy into explosive …

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Abstract: Sprinting speed plays a crucial role in many sports, and it is considered a fundamental motor skill. Various training methods can be used to improve sprinting speed. Researchers have shown strength and plyometric training (PT) to be effective in improving sprinting speed. However, most studies have reviewed the effects of strength and PT on …

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Abstract Background: Based on recent findings regarding the mechanical determinants of sprint performance, resisted sled sprint (RSS) training may provide an effective tool for the improvement of sprint acceleration and maximal velocity. However, the volume and intensity for effective RSS training in different populations is unclear. Objectives: The primary objective was to evaluate the effectiveness of RSS …

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Purpose: We transposed the concept of effectiveness of force application used in pedaling mechanics to calculate the ratio of forces (RF) during sprint running and tested the hypothesis that field sprint performance was related to the technical ability to produce high amounts of net positive horizontal force. This ability represents how effectively the total force developed …

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Abstract Background: Synchronized arm and leg motion are characteristic of human running. Leg motion is an obvious gait requirement, but arm motion is not, and its functional contribution to running performance is not known. Because arm-leg coupling serves to reduce rotation about the body’s vertical axis, arm motion may be necessary to achieve the body …

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Abstract Introduction: A growing body of research has focused on between-leg asymmetry as a critical factor for athletic performance and dysfunction. Specifically, various measures of between-leg asymmetry during running have been investigated in both healthy and injured populations. However, while the most important factor for running performance is the magnitude and rate of ground force application, …

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Abstract: Although running shoes alter foot-ground reaction forces, particularly during impact, how they do so is incompletely understood. Here, we hypothesized that footwear effects on running ground reaction force-time patterns can be accurately predicted from the motion of two components of the body’s mass (mb): the contacting lower-limb (m1 = 0.08mb) and the remainder (m2 …

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