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https://www.readbyqxmd.com/read/28630577/effects-of-high-velocity-elastic-band-versus-heavy-resistance-training-on-hamstring-strength-activation-and-sprint-running-performance
#1
Donatas Janusevicius, Audrius Snieckus, Albertas Skurvydas, Viktoras Silinskas, Eugenijus Trinkunas, Joan Aureli Cadefau, Sigitas Kamandulis
Hamstring muscle injuries occur during high-speed activities, which suggests that muscular strength at high velocities may be more important than maximal strength. This study examined hamstring adaptations to training for maximal strength and for strength at high velocities. Physically active men (n = 25; age, 23.0 ± 3.2 years) were randomly divided into: (1) a resistance training (RT, n = 8) group, which performed high-load, low-velocity concentric-eccentric hamstring contractions; (2) a resistance training concentric (RTC; n = 9) group, which performed high-load, low-velocity concentric-only hamstring contractions; and (3) a high-velocity elastic band training (HVT, n = 8) group, which performed low-load, high-velocity concentric-eccentric hamstring contractions...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28623425/effects-of-a-20-week-high-intensity-strength-and-sprint-training-program-on-tibial-bone-structure-and-strength-in-middle-aged-and-older-male-sprint-athletes-a-randomized-controlled-trial
#2
T H Suominen, M T Korhonen, M Alén, A Heinonen, A Mero, T Törmäkangas, H Suominen
This randomized, controlled, high-intensity strength and sprint training trial in middle-aged and older male sprint athletes showed significant improvements in mid-tibial structure and strength. The study reveals the adaptability of aging bone, suggesting that through a novel, intensive training stimulus it is possible to strengthen bones during aging. INTRODUCTION: High-load, high-speed and impact-type exercise may be an efficient way of improving bone strength even in old age. We evaluated the effects of combined strength and sprint training on indices of bone health in competitive masters athletes, who serve as a group of older people who are likely to be able to participate in vigorous exercise of this kind...
June 16, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28597616/comparison-of-the-movement-patterns-between-small-and-large-side-games-training-and-competition-in-professional-soccer-players
#3
Jesús V Giménez, Juan Del-Coso, Anthony S Leicht, Miguel A Gomez
BACKGROUND: The purpose of this investigation was to compare the movement patterns of professional soccer players during a small-sided game (SSG), a large-sided game (LSG) and a competitive friendly match (FM). METHODS: Fourteen professional players participated in three training routines with a similar relative pitch area per player. The SSG and LSG consisted of 8 repetitions of 4-min game play, interspersed by 2-min of active recovery, and their data were compared to the first 32 minutes of a FM...
June 8, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28595870/high-speed-running-and-sprinting-as-an-injury-risk-factor-in-soccer-can-well-developed-physical-qualities-reduce-the-risk
#4
Shane Malone, Adam Owen, Bruno Mendes, Brian Hughes, Kieran Collins, Tim J Gabbett
OBJECTIVES: This study investigated the association between high-speed running (HSR) and sprint running (SR) and injuries within elite soccer players. The impact of intermittent aerobic fitness as measured by the end speed of the 30-15 intermittent fitness test (30-15VIFT) and high chronic workloads (average 21-day) as potential mediators of injury risk were also investigated. DESIGN: Observational Cohort Study. METHODS: 37 elite soccer players from one elite squad were involved in a one-season study...
May 25, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28595867/the-match-to-match-variation-of-match-running-in-elite-female-soccer
#5
Joshua Trewin, César Meylan, Matthew C Varley, John Cronin
OBJECTIVES: The purpose of this study was to examine the match-to-match variation of match-running in elite female soccer players utilising GPS, using full-match and rolling period analyses. DESIGN: Longitudinal study. METHODS: Elite female soccer players (n=45) from the same national team were observed during 55 international fixtures across 5 years (2012-2016). Data was analysed using a custom built MS Excel spreadsheet as full-matches and using a rolling 5-min analysis period, for all players who played 90-min matches (files=172)...
May 25, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28595239/changes-in-sprint-related-outcomes-during-a-period-of-systematic-training-in-a-girls-soccer-academy
#6
Matthew David Wright, Greg Atkinson
Longitudinal data tracking performance indicators collected during structured training are lacking in young female soccer players. Therefore, changes in 5-m acceleration, 20-m speed, change-of-direction speed and repeated-sprint ability were quantified during a three-year period in an FA Centre of Excellence. Fourteen players (mean age = 12.1 years, SD = ±0.9) were recruited and their best performance scores from pre-season and in-season testing were averaged. Players were typically exposed to soccer (2 x 90 min per week) and strength and conditioning training (1 x 70 min per week) and played 20 soccer matches (50-80 min) during 35-week seasons...
June 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28562524/the-work-rate-of-elite-hurling-match-play
#7
Kieran Collins, Allistair McRobert, James P Morton, Declan O' Sullivan, Dominic A Doran
The current study describes the global work-rate of elite hurling match-play and the influence which positional difference has on work-rate is considered. The movement of ninety-four players was recorded using GPS, sampling at 4Hz in a total of 12 games. Data were classified according to the positional line on the field and period of the match. The total and high speed distance of match-play was 7617 ± 1219 m (95% CI, 7367 - 7866) and 1134 ± 358 m (95% CI, 1060 - 1206) respectively. The maximum speed attained was 29...
January 27, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28557852/analysis-of-high-intensity-skating-in-top-class-ice-hockey-match-play-in-relation-to-training-status-and-muscle-damage
#8
Erik Lignell, Dan Fransson, Peter Krustrup, Magni Mohr
We examined high-intensity activities in a top-class ice-hockey game and the effect of training status. Male ice-hockey players (n=36) from the NHL participated. Match-analysis was performed during a game and physical capacity was assessed by a submaximal Yo-Yo Intermittent Recovery Ice-hockey test, level 1 (YYIR1-IHSUB). Venous blood samples were collected 24-h post-game to determine markers of muscle damage. Players performed 119±8 and 31±3 m·min of high-intensity and sprint-skating, respectively, during a game...
May 23, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28557851/decrements-in-neuromuscular-performance-and-increases-in-creatine-kinase-impact-training-outputs-in-elite-soccer-players
#9
Shane Malone, Bruno Mendes, Brian Hughes, Mark Roe, Simon Devenney, Kieran Collins, Adam Owen
The aim of the current investigation was to understand the impact of pre-training neuromuscular performance and creatine kinase status on subsequent training performance in elite soccer players. Thirty soccer players (age: 25.3 ± 3.1 years; height: 183 ± 7 cm; mass: 72 ± 7 kg) were involved in this observational study. Each morning prior to training, players completed assessments for neuromuscular performance (countermovement jump; CMJ) and creatine kinase (CK) levels. Global positioning technology provided external load: total distance, high-speed distance, sprint distance, accelerations, decelerations, average metabolic power, explosive distance, high metabolic power distance (>25...
May 23, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538324/physical-fitness-reference-standards-in-french-youth-the-bouge-program
#10
Jérémy Vanhelst, Julien Labreuche, Laurent Béghin, Elodie Drumez, Paul S Fardy, Didier Chapelot, Jacques Mikulovic, Zékya Ulmer
Vanhelst, J, Julien, JL, Beghin, L, Drumez, E, Fardy, PS, Chapelot, D, Mikulovic, J, and Ulmer, Z. Physical fitness reference standards in French youth: The BOUGE program. J Strength Cond Res 31(6): 1709-1718, 2017-The aim of this study was to establish sex- and age-specific physical fitness percentiles in French youth. A sample of 11,186 children and adolescents (5,546 boys and 5,640 girls), aged between 10 and 15 years, was assessed in the French national BOUGE study. Participants were tested for their cardiorespiratory fitness, muscular endurance, speed, flexibility, and agility using the following tests: 20-m shuttle run tests, curl-ups test, 50-m sprint test, back-saver sit and reach test, and 10 × 5-m shuttle run test...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538299/maximal-sprinting-speed-of-elite-soccer-players-during-training-and-matches
#11
Leo Djaoui, Karim Chamari, Adam L Owen, Alexandre Dellal
The aim of the present study was to compare (a) the maximal sprinting speed (MSS) attained by soccer players during matches (MSSmatch) according to their level of play (professional first French division vs. elite amateur fourth French division) and the playing positions and (b) the MSS attained by professional soccer players during 14 different types of small-sided games (SSG, MSSSSG) and match-play. All players monitored through the study performed a 40-m sprint test to assess individual MSS (MSStest) and compare it to the training and match activity, with the calculation of the percentage of MSStest (%MSStest) reached...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538298/quantifying-the-high-speed-running-and-sprinting-profiles-of-elite-female-soccer-players-during-competitive-matches-using-an-optical-player-tracking-system
#12
Jocelyn K Mara, Kevin G Thompson, Kate L Pumpa, Stuart Morgan
The aim of this study was to determine the high-speed running and sprinting profiles of elite female soccer players during competitive matches using a new Optical Player Tracking system. Eight stationary video cameras were positioned at vantage points surrounding the soccer field so that when each camera view was combined, the entire field could be viewed simultaneously. After each match, an optical player tracking system detected the coordinates (x, y) of each player for every video frame. Algorithms applied to the x and y coordinates were used to determine activity variables for 12 elite female players across 7 competitive matches...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538294/effects-of-different-combinations-of-strength-power-and-plyometric-training-on-the-physical-performance-of-elite-young-soccer-players
#13
Ronaldo Kobal, Irineu Loturco, Renato Barroso, Saulo Gil, Rogério Cuniyochi, Carlos Ugrinowitsch, Hamilton Roschel, Valmor Tricoli
The combination of strength (ST) and plyometric training (PT) has been shown to be effective for improving sport-specific performance. However, there is no consensus about the most effective way to combine these methods in the same training session to produce greater improvements in neuromuscular performance of soccer players. Thus, the purpose of this study was to compare the effects of different combinations of ST and PT sequences on strength, jump, speed, and agility capacities of elite young soccer players...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28514202/the-physical-characteristics-of-match-play-in-english-schoolboy-and-academy-rugby-union
#14
Dale B Read, Ben Jones, Padraic J Phibbs, Gregory A B Roe, Joshua Darrall-Jones, Jonathon J S Weakley, Kevin Till
The aim was to compare the physical characteristics of under-18 academy and schoolboy rugby union competition by position (forwards and backs). Using a microsensor unit, match characteristics were recorded in 66 players. Locomotor characteristics were assessed by maximum sprint speed (MSS) and total, walking, jogging, striding and sprinting distances. The slow component (<2 m · s(-1)) of PlayerLoad(TM) (PLslow), which is the accumulated accelerations from the three axes of movement, was analysed as a measure of low-speed activity (e...
May 17, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28509631/improving-balance-mobility-and-dual-task-performance-in-an-adolescent-with-cerebral-palsy-a-case-report
#15
Sarah Fisher-Pipher, Lisa K Kenyon, Marci Westman
BACKGROUND AND PURPOSE: Improving functional mobility is often a desired outcome for adolescents with cerebral palsy (CP). Traditional neurorehabilitation approaches are frequently directed at impairments; however, improvements may not be carried over into functional mobility. The purpose of this case report was to describe the examination, intervention, and outcomes of a task-oriented physical therapy intervention program to improve dynamic balance, functional mobility, and dual-task performance in an adolescent with CP...
July 2017: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/28498791/the-influence-of-successive-matches-on-match-running-performance-during-an-under-23-international-soccer-tournament-the-necessity-of-individual-analysis
#16
Matthew C Varley, Valter Di Salvo, Mattia Modonutti, Warren Gregson, Alberto Mendez-Villanueva
This study investigated the effects of successive matches on match-running in elite under-23 soccer players during an international tournament. Match-running data was collected using a semi-automated multi-camera tracking system during an international under-23 tournament from all participating outfield players. Players who played 100% of all group stage matches were included (3 matches separated by 72 h, n = 44). Differences in match-running performance between matches were identified using a generalised linear mixed model...
May 12, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28488832/road-to-the-olympics-physical-fitness-of-medalists-of-the-canoe-sprint-junior-european-and-world-championship-events-over-the-past-20-years
#17
Viktor Bielik, Leonard Lendvorský, Lukáš Lengvarský, Peter Lopata, Róbert Petriska, Jana Pelikánová
BACKGROUND: In this article we aimed to find out whether there is a difference in physiological, anthropometric and power variables between medalists in junior international Championship events (MJCH) and the remaining members of the national team (NT) in flat water canoe sprint. METHODS: Sixty male junior kayakers from Slovak NT were tested annually between years 1995 and 2016. Sixteen of them won at least one medal (gold, silver or bronze) at junior international Championship...
May 9, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28486332/short-term-heat-acclimation-and-precooling-independently-and-combined-improve-5-km-running-performance-in-the-heat
#18
C A James, A J Richardson, A G B Willmott, P W Watt, O R Gibson, N S Maxwell
Following heat acclimation (HA), endurance running performance remains impaired in hot vs temperate conditions. Combining HA with precooling demonstrates no additive benefit in intermittent sprint, or continuous cycling exercise protocols, during which heat strain may be less severe compared to endurance running. This study investigated the effect of short-term heat acclimation (STHA) combined with mixed-methods precooling, on endurance running performance and directly compared precooling and HA. Nine amateur trained runners completed 5 km treadmill time trials in the heat (32°C, 60% RH) under four conditions; no intervention (CON), precooling (PC), short-term heat acclimation (5 days - HA) and short-term heat acclimation with precooling (HA+PC)...
May 5, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28486330/the-impact-of-dry-land-sprint-start-training-on-the-short-track-speed-skating-start
#19
William B Haug, Eric J Drinkwater, Nicholas J Cicero, J Anthony Barthell, Dale W Chapman
This investigation sought to determine the effects of dry-land sprint start training on short track speed skating (STSS) start performance. Nine highly trained short track athletes completed a control period of normal STSS training followed by a four-week training intervention. Before and after the control and intervention periods, athletes performed three electronically timed dry-land and on-ice 14.43 m maximal sprint start efforts. The intervention consisted of two sprint sessions per week consisting of nine electronically timed 14...
May 5, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28483560/the-influence-of-a-12-carbohydrate-electrolyte-beverage-on-self-paced-soccer-specific-exercise-performance
#20
Liam D Harper, Emma J Stevenson, Ian Rollo, Mark Russell
OBJECTIVES: To assess the physiological and performance effects of a 12% carbohydrate-electrolyte beverage consumed at practically applicable time-points (i.e., before each half) throughout simulated soccer match-play. DESIGN: Randomised, counterbalanced, crossover. METHODS: Fed players (n=15) performed 90-min of soccer-specific exercise (including self-paced exercise at the end of each half). Players consumed carbohydrate-electrolyte (CHO; 60g×500ml(-1), Na(+) 205mg×500ml(-1)), placebo-electrolyte (PL) or water (Wat) beverages at the end of the warm-up (250ml) and half-time (250ml plus ad-libitum water)...
April 21, 2017: Journal of Science and Medicine in Sport
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