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Changes in Sprint Force–Velocity Profile in International Para Footballers

Iván Peña-González, Alejandro Javaloyes, Jose Manuel Sarabia, and Manuel Moya-Ramón

the main physical actions that determine a high performance (eg, accelerations, sprints, or changes of direction among others) are the same as in regular football. 2 , 3 Both regular and CP football are intermittent sports in which the aforementioned short and high-intensity actions, which are

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Association of Sprint Performance With Ground Reaction Forces During Acceleration and Maximal Speed Phases in a Single Sprint

Ryu Nagahara, Mirai Mizutani, Akifumi Matsuo, Hiroaki Kanehisa, and Tetsuo Fukunaga

increase in the forward velocity of the center of gravity during the support phase at higher speeds. As running speed during over-ground accelerated sprinting increases, propulsive force and impulse decrease, while braking force and impulse increase, resulting in a decrease in net anterior

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The Effect of Maximal Speed Ability, Pacing Strategy, and Technique on the Finish Sprint of a Sprint Cross-Country Skiing Competition

Pål Haugnes, Per-Øyvind Torvik, Gertjan Ettema, Jan Kocbach, and Øyvind Sandbakk

Sprint cross-country (XC) skiing involves a 1.0- to 1.8-km qualifying time-trial race followed by 3 subsequent knockout heats where 6 competitors in each heat compete for the first ranks that qualify for the next round and/or for winning the final. Although maximal oxygen uptake (VO 2 max

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Effects of a 6-Week Repeated-Sprint Training With Voluntary Hypoventilation at Low and High Lung Volume on Repeated-Sprint Ability in Female Soccer Players

Mounir Ait Ali Braham, Youva Ouchen, and Xavier Woorons

Soccer is a sport involving intermittent high-intensity efforts that include short sprints, accelerations, rapid decelerations, changes of direction, and jumps. 1 The ability to recover rapidly from these efforts in order to maintain a high level of intensity throughout a soccer match is paramount

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Repeated-Sprint Training With Blood-Flow Restriction Improves Repeated-Sprint Ability Similarly to Unrestricted Training at Reduced External Loads

James R. Mckee, Olivier Girard, Jeremiah J. Peiffer, Daniel J. Hiscock, Kristen De Marco, and Brendan R. Scott

Sustaining performance over a series of short-duration efforts (≤10 s) interspersed with brief recovery periods (≤60 s; ie, repeated-sprint ability [RSA]) is crucial for team-sport competition. 1 , 2 Repeated-sprint training (RST) can improve RSA by combating physiological factors contributing to

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Vertical Versus Horizontal Resisted Sprint Training Applied to Young Soccer Players: Effects on Physical Performance

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

Sprinting, change of direction (COD), and jumps are fundamental capabilities to soccer performance. In fact, these capabilities are the most common actions of players when scoring a goal, assisting a teammate, or anticipating opponents’ behavior. 1 Furthermore, the average of players’ performance

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Age-Related Differences in Spatiotemporal Variables and Ground Reaction Forces During Sprinting in Boys

Ryu Nagahara, Yohei Takai, Miki Haramura, Mirai Mizutani, Akifumi Matsuo, Hiroaki Kanehisa, and Tetsuo Fukunaga

Maximal effort short-distance running (hereafter, sprinting) ability develops with maturation, being associated with increases in body size (particularly, height) and strength-power capability, as well as development of the neural system. Running speed can be considered as a product of step length

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Gastric Emptying of Fluids during Variable-Intensity Running in the Heat

Nicholas Gant, John B. Leiper, and Clyde Williams

This study examined gastric emptying, core temperature, and sprint performance during prolonged intermittent shuttle running in 30 °C when ingesting a carbohydrate-electrolyte solution (CES) or favored water (FW). Nine male soccer players performed 60 min of shuttle running, ingesting fluid before exercise and every 15 min during exercise. Gastric emptying was measured using a double-sampling aspiration technique, and intestinal temperature was monitored via ingested capsules. There were no differences between trials in the total fluid volume emptied from the stomach during each exercise period (P = 0.054). The volume emptied every 15 min was 244 ± 67 mL in the CES trial and 273 ± 66 mL in the FW trial. Intestinal temperature was higher during exercise in the CES trial (P = 0.004), and cumulative sprint time was shorter (P = 0.037). Sprint performance was enhanced by the ingestion of a CES, which resulted in elevated core temperatures, and the rate of gastric emptying remained similar between solutions.

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Effect of Heavy Resisted Sled Sprint Training During the Competitive Season on Sprint and Change-of-Direction Performance in Professional Soccer Players

Brian J. McMorrow, Massimiliano Ditroilo, and Brendan Egan

independently, which has resulted in increased interest in developing time-efficient strategies that enhance movement-specific actions. Resisted sled sprinting (RSS) involves an athlete sprinting while towing a weighted sled to produce an overload during the specific movement patterns of sprinting. 2 The

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Relationship Between Isometric Force–Time Characteristics and Sprint Kayaking Performance

Danny Lum and Abdul Rashid Aziz

Success in sprint kayaking is achieved by covering a specific distance (eg, 200, 500, and 1000 m) in the shortest time possible. The kayak paddling stroke, which includes the catch, pull exit, and recovery phases, involves the coordinated actions of the trunk and the upper- and lower-limb muscles