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https://www.readbyqxmd.com/read/28109712/effects-of-long-haul-transmeridian-travel-on-player-preparedness-case-study-of-a-national-team-at-the-2014-fifa-world-cup
#1
Peter M Fowler, Alan McCall, Mark Jones, Rob Duffield
OBJECTIVES: Describe the effects of eastward long-haul transmeridian air travel on subjective jet-lag, sleep and wellness in professional football (soccer) players prior to the 2014 FIFA World Cup in Brazil. DESIGN: Single cohort involving twenty-two male professional football players representing a national football team. METHODS: Data was collected from players prior to and following international travel from Sydney, Australia to Vitoria, Brazil...
September 2, 2016: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28094488/effects-of-leg-contrast-strength-training-on-sprint-agility-and-repeated-change-of-direction-performance-in-male-soccer-players
#2
Mehréz Hammami, Yassine Negra, Roy J Shephard, Mohamed Souhaiel Chelly
BACKGROUND: Contrast training is popular technique among individuals who are involved in dynamic sports, having as its goal an increase in dynamic muscular performance. It is characterized by the use of high and low loads in the same strength training session. The present investigation aimed to determine the effects of adding 8--weeks of contrast strength training (CSTP) to regular soccer practice in U--17 male soccer players during the competitive season. We hypothesized that CSTP would enhance their performance...
January 17, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28090138/agility-training-in-young-elite-soccer-players-promising-results-compared-to-change-of-direction-drills
#3
A Chaalali, M Rouissi, M Chtara, A Owen, N L Bragazzi, W Moalla, A Chaouachi, M Amri, K Chamari
The aim of this study was to compare the effect of two different training programmes - change of direction (COD) vs. agility (AG) - on straight sprint (SS), COD and AG test performances in young elite soccer players. Thirty-two soccer players (age: 14.5±0.9 years; height: 171.2±5.1 cm; body mass: 56.4±7.1 kg, body fat: 10.3±2.3%) participated in a short-term (6 weeks) training study. Players were randomly assigned to two experimental groups - training with change of direction drills (COD-G, n=11) or using agility training (AG-G, n= 11) - and to a control group (CON-G, n=10)...
December 2016: Biology of Sport
https://www.readbyqxmd.com/read/28065123/observations-of-youth-football-training-how-do-coaches-structure-training-sessions-for-player-development
#4
Donna O'Connor, Paul Larkin, A Mark Williams
We used systematic observation tools to explore the structure (i.e., activity and inactivity) and sequencing (i.e., the types of activities used) of football coaching sessions in Australia following the implementation of a new National Curriculum. Youth soccer coaches (n = 34), coaching within the Skill Acquisition (U11-U13 n = 19) and Game Training (U14-U17 n = 15) phases of the Football Federation Australia National Curriculum participated. Participants were filmed during a regular coaching session, with systematic observation of the session undertaken to provide a detailed analysis of the practice activities and coach behaviours...
January 7, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28050927/energy-intake-and-expenditure-of-professional-soccer-players-of-the-english-premier-league-evidence-of-carbohydrate-periodization
#5
Liam Anderson, Patrick Orme, Robert J Naughton, Graeme L Close, Jordan Milsom, David Rydings, Andy O'Boyle, Rocco Di Michele, Julien Louis, Catherine Hambley, John Roger Speakman, Ryland Morgans, Barry Drust, James P Morton
In an attempt to better identify and inform the energy requirements of elite soccer players, we quantified the energy expenditure (EE) of players from the English Premier League (n=6) via the doubly labeled water method (DLW) over a 7-day in-season period. Energy intake (EI) was also assessed using food diaries, supported by the remote food photographic method and 24 h recalls. The 7-day period consisted of 5 training days (TD) and 2 match days (MD). Although mean daily EI (3186 ± 367 kcals) was not different from (P>0...
January 4, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28033036/nonverbal-communication-of-confidence-in-soccer-referees-an-experimental-test-of-darwin-s-leakage-hypothesis
#6
Philip Furley, Geoffrey Schweizer
The goal of the present paper was to investigate whether soccer referees' nonverbal behavior (NVB) differed based on the difficulty of their decisions and whether perceivers could detect these systematic variations. On the one hand, communicating confidence via NVB is emphasized in referee training. On the other hand, it seems feasible from a theoretical point of view that particularly following relatively difficult decisions referees have problems controlling their NVB. We conducted three experiments in order to investigate into this question...
December 29, 2016: Journal of Sport & Exercise Psychology
https://www.readbyqxmd.com/read/28031773/developing-talented-soccer-players-an-analysis-of-socio-spatial-factors-as-possible-key-constraints
#7
Jaime Serra-Olivares, Juan C Pastor-Vicedo, Sixto González-Víllora, Israel Teoldo da Costa
Most studies on the identification and development of soccer talent have been one-dimensional in nature. Although some multi-dimensional analyses have been conducted, few research studies have assessed in any depth the socio-spatial factors influencing talent development. The aim of this particular study was to analyse variations in the international representation of clubs (n = 821) and countries (n = 59) in the development of players who took part in the 2014 FIFA Soccer World Cup. Clubs and countries were ranked and divided into quartiles according to the number of players developed between the ages of 15 and 21 (clubs and countries that developed players for at least three years between these ages) and the number of official league matches played by these players up to the age of 23...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28031772/the-chronotype-of-elite-athletes
#8
Michele Lastella, Gregory D Roach, Shona L Halson, Charli Sargent
The aims of this study were (i) to compare the chronotype distribution of elite athletes to a young adult population and (ii) to determine if there was a tendency for athletes to select and/or participate in sports which suited their chronotype. A total of 114 elite athletes from five sports (cricket, cycling, hockey, soccer and triathlon) participated in this study. The participants' chronotype, sleepiness, sleep satisfaction and sleep quality were determined using the Horne and Östberg Morningness and Eveningness questionnaire, the Epworth Sleepiness Scale and questions concerning their sleep satisfaction and quality...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28031767/mechanical-differences-between-barbell-and-body-optimum-power-loads-in-the-jump-squat-exercise
#9
Irineu Loturco, Lucas A Pereira, Vinicius Zanetti, Katia Kitamura, César C Cal Abad, Ronaldo Kobal, Fabio Y Nakamura
This study compared the values of bar-peak force (PFBar) and power (PPBar), body-peak force (PFBody) and power (PPBody) and bar-mean propulsive power (MPPBar) in different jump-squat (JS) conditions: unloaded condition (UC); bar-loaded condition (BLC) and optimum bar-MPP condition (OBC). Twenty-five soccer players performed the JS using a bar with negligible mass (UC), using the Smith-machine bar (BLC) and using the load capable of maximizing the bar-MPP (OBC). The PFBody was significantly higher in the UC (2847...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28026984/examining-changes-to-center-of-pressure-during-the-first-trials-of-wii-gameplay
#10
Rebecca Reed-Jones, Laura Carvalho, Chelsey Sanderson, William Montelpare, Nicholas Murray, Douglas Powell
OBJECTIVE: Use of the Nintendo Wii™ as a balance assessment and rehabilitation tool continues to grow. One advantage of the Wii is that games can serve as a virtual reality training tool; however, a disadvantage of the Wii is the human-machine interface and the learning effect over multiple trials. The purpose of this study was to assess changes in postural control during Wii gameplay over a series of trials in novice players. MATERIALS AND METHODS: Thirty-one university athletes (aged 18-25 years) completed four trials of the Nintendo Wii Fit™ soccer heading (SH) balance game...
December 27, 2016: Games for Health
https://www.readbyqxmd.com/read/28017518/effectiveness-of-a-stress-management-pilot-program-aimed-at-reducing-the-incidence-of-sports-injuries-in-young-football-soccer-players
#11
Aurelio Olmedilla-Zafra, Victor J Rubio, Enrique Ortega, Alexandre García-Mas
OBJECTIVES: Several attempts to reduce the incidence of sport injuries using psychosocial interventions produced fruitful, although inconclusive results. This paper presents the effectiveness and implementation issues of a pilot 3-month stress-management and muscle relaxation program aimed at reducing sport injury incidence. DESIGN: Pre-post treatment-non treatment group comparison. PROGRAM ADMINISTRATION: The program was administered by a trained psychologist on a once-a-week, 1-h session basis...
September 6, 2016: Physical Therapy in Sport
https://www.readbyqxmd.com/read/28002179/game-profile-based-training-in-soccer-a-new-field-approach
#12
Antonio Dello Iacono, Domenico Martone, Drazen Cular, Mirjana Milic, Johnny Padulo
The aim of the study was to profile and compare the time-motion, physiological, and neuromuscular responses of both national youth league (NYL) and UEFA Youth League (UYL) matches with those of an experimental game-profile-based training (GPBT) protocol. Time-motion traits and physiological, perceptual, and neuromuscular responses were investigated in 24 male soccer players across 14 matches and 6 GPBT training sessions, for a total of 420 samples. The GPBT had a greater influence on time-motion traits and perceptual responses than the NYL and UYL matches (all p< 0...
December 8, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28002177/selected-physiological-perceptual-and-physical-performance-changes-during-two-bouts-of-prolonged-high-intensity-intermittent-running-separated-by-72-hours
#13
Nicholas Dobbin, Kevin Lamb, Craig Twist
This study investigated the effects of performing a second 90-minute intermittent running protocol 72 hours after an initial trial on selected physiological, perceptual and sprint running measures. Eight sub-elite soccer players provided measures of isokinetic muscle function, counter-movement jump (CMJ), 10 m sprinting, and muscle soreness before, and at 0, 24, 48 and 72 h after a 90-minute intermittent high intensity running bout (IHIR 1). A second 90-minute intermittent high intensity running bout (IHIR 2) was performed 72 h after the first...
December 8, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27999720/changes-in-dynamic-balance-and-hip-strength-after-an-eight-week-conditioning-program-in-ncaa-division-i-female-soccer-football-athletes
#14
Brandon M Ness, Brett A Comstock, William E Schweinle
BACKGROUND: Lower extremity injury commonly affects female soccer athletes. Decreased dynamic balance and hip strength are identified risk factors for lower extremity injury. Little is known about how these factors adapt to a training stimulus in this population. PURPOSE: To retrospectively investigate changes in lower extremity dynamic balance and isometric hip strength in Division I collegiate female soccer athletes after participating in an eight-week strength and conditioning program...
December 2016: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/27990225/quantifying-inter-segmental-coordination-during-the-instep-soccer-kicks
#15
Yumeng Li, Marion Alexander, Cheryl Glazebrook, Jeff Leiter
In order to generate a high ball speed in soccer, the inter-segmental coordination of the kicking leg is critical. The purpose of this study was to quantify the coordination between the thigh and shank movement in the sagittal plane during instep kicks. Eleven female soccer players were video recorded using a high-speed (80 Hz) video camera during penalty kicks. Hip, knee and ankle joint centers of the right leg were digitized, and the movement was analyzed using Dartfish TeamPro (6.0). The thigh and shank segment angles were generated, and the coordination was quantified using the cross-correlation and the vector coding method...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27984500/seasonal-changes-in-soccer-players-body-composition-and-dietary-intake-practices
#16
Brooke L Devlin, Michael Kingsley, Michael D Leveritt, Regina Belski
The aims of this study were two-fold: to determine seasonal changes in dietary intake and body composition in elite soccer players and to evaluate the influence of self-determined individual body composition goals on dietary intake and body composition. This longitudinal, observational study assessed body composition (total mass, fat-free soft tissue mass and fat mass) using dual-energy x-ray absorptiometry and dietary intake (energy and macronutrients) via multiple pass 24-hour recalls, at four time points over a competitive season in elite soccer players from one professional club in the Australian A-League competition...
November 29, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27984438/assessing-the-effectiveness-of-the-functional-movement-screen-fms%C3%A2-in-predicting-non-contact-injury-rates-in-soccer-players
#17
Paul D Smith, Michael Hanlon
This study assessed if the Functional Movement Screen (FMS™) can accurately predict non-contact injury in adult soccer players when normalizing non-contact injury occurrence against match exposure levels. Senior male players (n=89) from five League of Ireland semi-professional clubs participated in the study (mean age=23.2 ± 4.4 years; mean height=179.5 ± 6.6 cm; mean body mass=77.5 ± 7.8 kg). Participants performed the FMS™ during preseason and their injury occurrence rates and match minutes were tracked throughout one season...
December 7, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27977300/preventive-neuromuscular-training-for-young-female-athletes-comparison-of-coach-and-athlete-compliance-rates
#18
Dai Sugimoto, Carl G Mattacola, Heather M Bush, Staci M Thomas, Kim D Barber Foss, Gregory D Myer, Timothy E Hewett
CONTEXT:  Fewer athletic injuries and lower anterior cruciate ligament injury incidence rates were noted in studies of neuromuscular training (NMT) interventions that had high compliance rates. However, several groups have demonstrated that preventive NMT interventions were limited by low compliance rates. OBJECTIVE:  To descriptively analyze coach and athlete compliance with preventive NMT and compare the compliance between study arms as well as among school levels and sports...
December 15, 2016: Journal of Athletic Training
https://www.readbyqxmd.com/read/27930450/yo-yo-intermittent-recovery-test-level-2-and-its-relationship-to-other-typical-soccer-field-tests-in-female-collegiate-soccer-players
#19
Robert G Lockie, Farzad Jalilvand, Matthew R Moreno, Ashley J Orjalo, Fabrice G Risso, Sophia Nimphius
The ability to complete high-intensity running is essential for soccer. The Yo-Yo Intermittent Recovery Test Level 2 (YYIRT2) can measure this capacity, but there is limited information regarding this assessment in collegiate female soccer players. This study investigated the YYIRT2 as a measure of high-intensity running in this population, and its relationship to other soccer field tests. Twenty-one players from a Division I team were recruited. In addition to the YYIRT2, subjects completed linear (0-5, 0-10, 0-30 m sprint intervals) and change-of-direction (pro-agility and 60-yard shuttle) speed tests, as well as the YYIRT Level 1 (YYIRT1), to assess relationships with YYIRT2 via correlations (p < 0...
November 19, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27930446/prediction-of-overuse-injuries-in-professional-u18-u21-footballers-using-metrics-of-training-distance-and-intensity
#20
Christopher S Bacon, Alexis R Mauger
The most common injury in professional football is an overuse injury to the lower limb. A significant external risk factor of this injury is the mismanagement of training and match loads. The aim of the current study was to examine the predictability of overuse injuries in professional youth soccer players using volume and intensity variables derived from Global Positioning Systems (GPS). A total of 41 players (Age - 17.8 yrs±1.1 yrs) training and match loads were assessed. These external loads were measured over two competitive seasons for every training session and match for each individual...
November 19, 2016: Journal of Strength and Conditioning Research
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