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Repeated sprints

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https://www.readbyqxmd.com/read/27931052/a-6-week-sprint-interval-training-program-changes-anaerobic-power-quadriceps-moment-and-subcutaneous-tissue-thickness
#1
S Han, H Lee, H Kim, D Kim, C Choi, J Park
We examined the effects of a 6-week 40-m one-way sprint interval training program (based on sprint time). 13 untrained healthy male collegiate students performed six 40-m sprints with a 60-s resting interval between sprints during the first week, and one sprint was added each week until the sixth week. If the 40-m sprint time exceeded 110% of the fastest baseline 40-m sprint time, the run was repeated. Repeated-sprint cycling test (every 3 weeks), quadriceps moment (every 2 weeks), and abdominal and thigh subcutaneous tissue thickness (every 2 weeks) were measured...
December 8, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27930743/effects-of-four-weeks-of-%C3%AE-alanine-supplementation-on-repeated-sprint-ability-in-water-polo-players
#2
Gabriel Motta Pinheiro Brisola, Guilherme Giannini Artioli, Marcelo Papoti, Alessandro Moura Zagatto
The purpose of this study was to investigate the effect of four weeks of β-alanine supplementation on repeated sprint ability in water polo players. Twenty-two male water polo players participated in the study, divided randomly into two homogeneous groups (placebo and β-alanine groups). The study design was double-blind, parallel and placebo controlled. Before and after the supplementation period (28 days), the athletes performed two specific repeated sprint ability tests interspaced by a 30-minute swimming test...
2016: PloS One
https://www.readbyqxmd.com/read/27919826/should-blood-pressure-goal-be-individualized-in-hypertensive-patients
#3
REVIEW
Alexandra Yannoutsos, Rania Kheder-Elfekih, Jean-Michel Halimi, Michel E Safar, Jacques Blacher
The aim of the present review is to consider the clinical relevance of individualized blood pressure (BP) goal under treatment in hypertensive patients according to their age, comorbidities or established cardiovascular (CV) disease. Evidence from large-scale randomized trials to support a lower BP goal, as initially recommended by guidelines in high-risk hypertensive patients, were lacking. Recently, the randomized intervention SPRINT trial studied two treatment targets for systolic BP (120mm Hg versus 140mm Hg in the intensive and standard treatment group, respectively) among high-risk hypertensive patients, without diabetes and without a history of prior stroke...
December 2, 2016: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/27918670/combined-plyometric-strength-training-improves-ice-hockey-players-on-ice-sprint
#4
Torstein E Dæhlin, Ole C Haugen, Simen Haugerud, Ivana Hollan, Truls Raastad, Bent R Rønnestad
: Combined plyometric and strength training have previously been suggested as a strategy to improve skating performance in ice hockey players. However, the effects of combined plyometric and strength training has not been previously been compared to the effects of strength training only. PURPOSE: To compare the effects of combined plyometric and strength training on ice hockey players' skating sprint performance with strength training only. METHODS: Eighteen participants were randomly assigned to two groups that completed 5 strength-training sessions per week for 8 weeks...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918667/neuromuscular-fatigue-aetiology-after-repeated-sprints-depends-on-exercise-modality
#5
Katja Tomazin, Jean-Benoit Morin, Guillaume Y Millet
PURPOSE: The aim of the study was to compare neuromuscular fatigue induced by repeated sprint running vs cycling. METHODS: Eleven active male participants performed two repeated maximal sprint protocol (5×6 s, 24-s rest periods, 4 sets, 3-min between sets), one in running (treadmill) and one in cycling (cycle ergometer). Neuromuscular function, evaluated before (PRE), 30 s after the first (S1), the second (S2), and the last set (LAST), and 5 min after the last set (POST5), consisted in determining knee extensors maximal voluntary torque (MVC), voluntary activation (VA), single twitch (Tw), high- (Db100) and low- (Db10) frequency torque, and maximal muscle compound action potential (M-wave) amplitude and duration of vastus lateralis...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27918661/how-does-a-short-interrupted-recovery-break-affect-performance-and-how-is-it-assessed-a-study-on-acute-effects
#6
Maximilian Pelka, Alexander Ferrauti, Tim Meyer, Mark Pfeiffer, Michael Kellmann
A recovery process with optimal prerequisites, which is interrupted, is termed disrupted recovery. Whether this process has an influence on performance-related factors needs to be investigated. Therefore, the aim of this study was to examine how a short disturbance of a recovery phase is assessed and whether subsequent repeated sprint performance is affected by it. A quasi-experimental 2x2-factors cross-over design with 34 sport science undergraduate students (age 20.3 ± 2.1) was applied. Factors were the type of intervention (power nap vs...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27904629/effect-of-various-kinds-of-beverages-on-stress-oxidative-f2-isoprostane-serum-lipid-and-blood-glucose-of-elite-taekwondo-players
#7
Zahra Maghsoudi, Ashfin Shiranian, Gholamreza Askai, Reza Ghaisvand
BACKGROUND: Athletes' recovery is important in improving their performance. Nutritional strategies can be effective in enhancing recovery rate. Choosing the best food items in appropriate intervals can play effective roles in resynthesis of fuels and recovery of muscle injury. Beverage micro and macronutrient content are helpful in fuel restoration. In this study, we assess the effects of various kinds of beverages on oxidative stress, muscle injury, and metabolic risk factors in taekwondo players...
September 2016: Iranian Journal of Nursing and Midwifery Research
https://www.readbyqxmd.com/read/27901339/cardiac-parasympathetic-reactivation-after-small-sided-soccer-games-and-repeated-sprints-in-untrained-healthy-adolescents
#8
Amri Hammami, Sofien Kasmi, Narimen Yousfi, Marwa Bouamra, Zouhaier Tabka, Ezdine Bouhlel
BACKGROUND: It has been shown that recreational soccer was a highly motivating and social activity which produces large improvements in health-related indices in sedentary healthy and unhealthy subjects. The purpose of this study was to compare the acute parasympathetic reactivation after small-sided soccer games (SSG) and repeated sprints training (RST) sessions. METHODS: Eight post-pubertal untrained adolescents (age 15.8 ± 0.6 years, body mass 59.1 ± 3.7 kg, height 1...
November 30, 2016: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/27896682/methods-of-power-force-velocity-profiling-during-sprint-running-a-narrative-review
#9
REVIEW
Matt R Cross, Matt Brughelli, Pierre Samozino, Jean-Benoit Morin
The ability of the human body to generate maximal power is linked to a host of performance outcomes and sporting success. Power-force-velocity relationships characterize limits of the neuromuscular system to produce power, and their measurement has been a common topic in research for the past century. Unfortunately, the narrative of the available literature is complex, with development occurring across a variety of methods and technology. This review focuses on the different equipment and methods used to determine mechanical characteristics of maximal exertion human sprinting...
November 28, 2016: Sports Medicine
https://www.readbyqxmd.com/read/27893482/effects-of-sprint-training-with-and-without-weighted-vest-on-speed-and-repeated-sprint-ability-in-male-soccer-players
#10
Ezequiel Rey, Alexis Padrón-Cabo, Diego Fernández-Penedo
The purpose of this study was to assess the effect resisted sprint training using weighted vests (WV) compared with unresisted sprint training (US) on physical fitness (countermovement jump, 10 m sprint, 30 m sprint and repeated sprint ability (RSA)) in amateur male soccer players. 19 soccer players (age: 23.7±4.5 years; height: 178.3±5.8 cm; body mass: 72.9±5.2 kg) were randomly assigned to a WV (n= 10) or a US (n= 9) group. The intervention program had to be carried out 2 times a week over 6 weeks. The only difference between the two interventions was that the WV group performed all the sprints with an additional weight of 18...
November 16, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27855489/acute-effects-of-kinesio-taping-on-a-6-s-maximal-cycling-sprint-performance
#11
Athos Trecroci, Damiano Formenti, Alessio Rossi, Fabio Esposito, Giampietro Alberti
Based on the hypothesis that tactile stimulation affects muscle activation levels, we theorized that taping vastus medialis and vastus lateralis muscles would improve a 6 s sprint cycling performance. Thus, the aim of this study was to determine whether the use of kinesio taping (KT) was helpful in increasing maximal-intensity cycling exercise. Sixteen active healthy subjects were enrolled in a randomized placebo, repeated measures design. All subjects were tested on a cycle ergometer under three conditions: without taping, taping along anterior thigh muscles and sham taping across the same muscle groups...
November 18, 2016: Research in Sports Medicine
https://www.readbyqxmd.com/read/27849114/effects-of-in-season-short-term-aerobic-and-high-intensity-interval-training-program-on-repeated-sprint-ability-and-jump-performance-in-handball-players
#12
Souhail Hermassi, Jørgen Ingebrigtsen, René Schwesig, Georg Fieseler, Karl S Delank, Karim Chamari, Roy J Shephard, Mohamed S Chelly
BACKGROUND: This study examined the effects of a 7-week in-season aerobic and high-intensity interval-training program on performance tests linked to successful handball play (e.g., repeated sprint and jumping ability). METHODS: Thirty participants (age 17.0 ± 1.2 years, body mass 81.1 ± 3.4 kg, height 1.82± 0.07 m) performed a Yo-Yo Intermittent Recovery Test level 1 (Yo-Yo IR1), a squat (SJ) and a countermovement jump test (CMJ), as well as a repeated sprint ability test (RSA)...
November 16, 2016: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/27825551/repeated-sprint-ability-but-not-neuromuscular-fatigue-is-dependent-on-short-versus-long-duration-recovery-time-between-sprints-in-healthy-males
#13
Michael R Monks, Chris T Compton, Joseph D Yetman, Kevin E Power, Duane C Button
OBJECTIVES: During maximal intensity leg cycling sprints, previous research has shown that central and peripheral fatigue development occurs with various (<30s) short-duration recovery periods between sprints. The aim of the current study was to compare the development of neuromuscular fatigue during maximal intensity lower-body sprints interspersed with short and longer duration recovery periods. DESIGN: Crossover study. METHODS: Ten participants completed 10, 10s sprints interspersed with either 30 or 180s of recovery...
October 27, 2016: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/27821967/physical-and-balance-performance-following-exercise-induced-muscle-damage-in-male-soccer-players
#14
Muzaffar Ahmad Khan, Jamal Ali Moiz, Shahid Raza, Shalini Verma, M Y Shareef, Shahnawaz Anwer, Ahmad Alghadir
[Purpose] The present study aimed to determine the changes in physical and balance performance following exercise-induced muscle damage using a sport-specific protocol. [Subjects and Methods] Fifteen collegiate soccer players were asked to perform a sport-specific sprint protocol to induce muscle damage. The markers of muscle damage (soreness, range of motion, limb girth, muscle strength, creatine kinase and lactate dehydrogenase), physical performance (speed, agility and power) and balance (static and dynamic balance) were assessed at baseline and 24, 48 and 72 hours following the sprint protocol...
October 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/27813046/the-association-between-mct1-t1470a-polymorphism-and-power-oriented-athletic-performance
#15
N Kikuchi, N Fuku, R Matsumoto, S Matsumoto, H Murakami, M Miyachi, K Nakazato
The purpose of this study was to investigate the effects of the MCT1 T1470A polymorphism (rs1049434) on power-oriented performance and lactate concentration during or after cycling sprints in Japanese wrestlers. Participants (199 wrestlers and 649 controls) were genotyped for the MCT1 T1470A genotype (rs1049434) using the TaqMan(®) Assay. All wrestlers were international (n=77) or national (n=122) level athletes. Among them, 46 wrestlers performed 2 anaerobic performance tests, a 30-s Wingate Anaerobic test (WAnT) and a series of 10 maximal effort 10-s sprints on a cycle ergometer...
November 3, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27808004/interval-training-elicits-higher-enjoyment-versus-moderate-exercise-in-persons-with-spinal-cord-injury
#16
Todd A Astorino, Jacob S Thum
BACKGROUND: High intensity interval training (HIIT) is a robust and time-efficient approach to improve multiple health indices including maximal oxygen uptake (VO2max). Despite the intense nature of HIIT, data in untrained adults report greater enjoyment of HIIT versus continuous exercise (CEX). However, this has yet to be investigated in persons with spinal cord injury (SCI). OBJECTIVE: To examine differences in enjoyment in response to CEX and HIIT in persons with SCI...
November 3, 2016: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/27806004/the-validity-and-contributing-physiological-factors-to-30-15-intermittent-fitness-test-performance-in-rugby-league
#17
Tannath J Scott, Grant M Duthie, Jace A Delaney, Colin E Sanctuary, David A Ballard, Jeremy A Hickmans, Ben J Dascombe
This study examined the validity of the 30-15 Intermittent Fitness Test (30-15IFT) within rugby league. Sixty-three Australian elite and junior-elite rugby league players (22.5 ± 4.5 yr, 96.1. kg ± 9.5 kg, Σ7 skinfolds: 71.0 ± 18.7 mm) from a professional club participated in this study. Players were assessed for anthropometry (body mass, Σ7 skinfolds, lean mass index), prolonged high-intensity intermittent running (PHIR; measured by 30-15IFT), predicted aerobic capacity (MSFT) and power (AAS), speed (40 m sprint), repeated sprint and change of direction (COD - 505 agility test) ability prior to and following an 11 week pre-season training period...
October 27, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27803631/assessment-of-technical-skills-in-young-soccer-goalkeepers-reliability-and-validity-of-two-goalkeeper-specific-tests
#18
Ricardo Rebelo-Gonçalves, António J Figueiredo, Manuel J Coelho-E-Silva, Antonio Tessitore
The purpose of this study was to evaluate the reproducibility and validity of two new tests designed to examine goalkeeper-specific technique. Twenty-six goalkeepers (14.49 ± 2.52 years old) completed two trial sessions, each separated by one week, to evaluate the reproducibility of the Sprint-Keeper Test (S-Keeper) and the Lateral Shuffle-Keeper Test (LS-Keeper). Construct validity was assessed among forty goalkeepers (14.49 ± 1.71 years old) by competitive level (elite versus non-elite), after controlling for chronological age...
September 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27798634/influence-of-fatigue-on-tackling-ability-in-rugby-league-players-role-of-muscular-strength-endurance-and-aerobic-qualities
#19
Tim J Gabbett
This study investigated the influence of repeated high-intensity effort exercise on tackling ability in rugby league players, and determined the relationship between physical qualities and tackling ability under fatigued conditions in these athletes. Eleven semi-professional rugby league players underwent measurements of speed (10 m and 40 m sprint), upper-body strength (4 repetition maximum [RM] bench press and weighted chin-up), upper-body muscular endurance (body mass maximum repetition chin-up, body mass maximum repetition dips), lower-body strength (4RM squat), and estimated maximal aerobic power (multi-stage fitness test)...
2016: PloS One
https://www.readbyqxmd.com/read/27787473/identifying-the-physical-fitness-anthropometric-and-athletic-movement-qualities-discriminant-of-developmental-level-in-elite-junior-australian-football-implications-for-the-development-of-talent
#20
Gaudion L Sarah, Doma Kenji, Sinclair Wade, Banyard G Harry, Woods T Carl
This study aimed to identify the physical fitness, anthropometric and athletic movement qualities discriminant of developmental level in elite junior Australian football (AF). From a total of 77 players, two groups were defined according to their developmental level; under 16 (U16) (n = 40, 15.6 to 15.9 y), and U18 (n = 37, 17.1 to 17.9 y). Players performed a test battery consisting of seven physical fitness assessments, two anthropometric measurements, and a fundamental athletic movement assessment. A multivariate analysis of variance tested the main effect of developmental level (two levels: U16, U18) on the assessment criterions, whilst binary logistic regression models and receiver operating characteristic (ROC) curves were built to identify the qualities most discriminant of developmental level...
October 13, 2016: Journal of Strength and Conditioning Research
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