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https://www.readbyqxmd.com/read/28214098/is-perceived-athlete-leadership-quality-related-to-team-effectiveness-a-comparison-of-three-professional-sports-teams
#1
Katrien Fransen, S Alexander Haslam, Clifford J Mallett, Niklas K Steffens, Kim Peters, Filip Boen
OBJECTIVES: Researchers have argued that leadership is one of the most important determinants of team effectiveness. The present study examined the extent to which the perceived quality of athlete leadership was related to the effectiveness of elite sports teams. DESIGN: Three professional football teams (N=135) participated in our study during the preparation phase for the Australian 2016 season. METHODS: Players and coaching staff were asked to assess players' leadership quality in four leadership roles (as task, motivational, social, and external leader) via an online survey...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28205009/mixed-pathologies-including-chronic-traumatic-encephalopathy-account-for-dementia-in-retired-association-football-soccer-players
#2
Helen Ling, Huw R Morris, James W Neal, Andrew J Lees, John Hardy, Janice L Holton, Tamas Revesz, David D R Williams
In retired professional association football (soccer) players with a past history of repetitive head impacts, chronic traumatic encephalopathy (CTE) is a potential neurodegenerative cause of dementia and motor impairments. From 1980 to 2010, 14 retired footballers with dementia were followed up regularly until death. Their clinical data, playing career, and concussion history were prospectively collected. Next-of-kin provided consent for six to have post-mortem brain examination. Of the 14 male participants, 13 were professional and 1 was a committed amateur...
February 15, 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/28203595/acute-gastrocnemius-soleus-complex-injuries-in-national-football-league-athletes
#3
Brian C Werner, Nicole S Belkin, Steve Kennelly, Leigh Weiss, Ronnie P Barnes, Hollis G Potter, Russell F Warren, Scott A Rodeo
BACKGROUND: Lower extremity muscle injuries are common in professional football. Although less common than hamstring or quadriceps injuries in National Football League (NFL) athletes, calf injuries occur with relative frequency and have not previously been studied. PURPOSE: To evaluate gastrocnemius-soleus complex muscle injuries over the past 13 years from a single NFL team to determine the incidence of such injuries, their imaging characteristics, and return to play after such injuries and any correlation between imaging findings and prolonged return to play...
January 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28203589/prevalence-of-vitamin-d-insufficiency-in-professional-hockey-players
#4
Nima Mehran, Brian M Schulz, Brian R Neri, William J Robertson, Orr Limpisvasti
BACKGROUND: Vitamin D is a fat-soluble hormone that plays a role in bone health, muscle function, and athletic performance. Studies have shown that low levels of vitamin D can lead to slower muscle recovery and function, increased rates of stress fractures, and even poorer athletic performance. Insufficient vitamin D levels have been demonstrated in professional basketball and football players, however, there have been no studies to date reviewing vitamin D insufficiency in professional hockey players...
December 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28202442/professional-football-may-be-linked-to-brain-injuries-usually-seen-in-boxing
#5
Nigel Hawkes
No abstract text is available yet for this article.
February 14, 2017: BMJ: British Medical Journal
https://www.readbyqxmd.com/read/28185809/hip-strength-and-range-of-motion-normal-values-from-a-professional-football-league
#6
Andrea B Mosler, Kay M Crossley, Kristian Thorborg, Rod J Whiteley, Adam Weir, Andreas Serner, Per Hölmich
OBJECTIVES: To determine the normal profiles for hip strength and range of motion (ROM) in a professional football league in Qatar, and examine the effect of leg dominance, age, past history of injury, and ethnicity on these profiles. DESIGN: Cross-sectional cohort study. METHODS: Participants included 394 asymptomatic, male professional football players, aged 18-40 years. Strength was measured using a hand held dynamometer with an eccentric test in side-lying for hip adduction and abduction, and the squeeze test in supine with 45° hip flexion...
August 23, 2016: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28182505/factors-affecting-match-running-performance-in-professional-australian-football
#7
Samuel Ryan, Aaron J Coutts, Joel Hocking, Thomas Kempton
PURPOSE: To examine the influence of a range of individual player characteristics and match-related factors on activity profiles during professional Australian football matches. METHODS: Global positioning system (GPS) profiles were collected from 34 professional Australian football players from the same club over 15 competition matches. GPS data were classified into relative total and high-speed running (HSR; >20 km·h(-1)) distances. Individual player aerobic fitness was determined from a two-kilometre time trial conducted during the pre-season...
February 9, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28180920/injury-mechanism-of-midfacial-fractures-in-football-causes-in-over-40-typical-neurological-symptoms-of-minor-brain-injuries
#8
Volker Krutsch, Markus Gesslein, Oliver Loose, Johannes Weber, Michael Nerlich, Axel Gaensslen, Viktor Bonkowsky, Werner Krutsch
PURPOSE: The injury mechanisms of midfacial fractures may be typical causes of concussion, but hardly any scientific data on midfacial injuries sustained in football are available. Head and brain trauma represent frequent injuries in athletes of different sports that require appropriate treatment by sports and trauma physicians. This study investigated the management of midfacial fractures in football and the association of such fractures with concomitant brain injury. METHODS: In a prospective cohort study lasting 24 months (2012 to 2013), midfacial injuries of football players were analysed with regard to the injury mechanisms, first aid procedures on the field, treatment and return-to-play...
February 8, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28163572/knee-problems-and-its-associated-factors-among-active-cyclists-in-eastern-province-saudi-arabia
#9
Abdullatif K Althunyan, Magdy A Darwish, Moataza M Abdel Wahab
INTRODUCTION: Bicycling is one of the most enjoyable aerobic exercises recommended for the promotion of an individual's health. The Eastern Province of Saudi Arabia has seen a huge increase in the number of people who cycle. People have different goals for bicycling, but the injuries they sustain are common. Most of them relate to overuse, particularly of lower body joints. This study was conducted to determine the prevalence of knee problems and factors associated with knee pain in cyclists...
January 2017: Journal of Family & Community Medicine
https://www.readbyqxmd.com/read/28149343/25-oh-d3-levels-relative-to-muscle-strength-and-maximum-oxygen-uptake-in-athletes
#10
Anna Książek, Aleksandra Zagrodna, Wioletta Dziubek, Bogdan Pietraszewski, Bartosz Ochmann, Małgorzata Słowińska-Lisowska
Vitamin D is mainly known for its effects on the bone and calcium metabolism. The discovery of Vitamin D receptors in many extraskeletal cells suggests that it may also play a significant role in other organs and systems. The aim of our study was to assess the relationship between 25(OH)D3 levels, lower limb isokinetic strength and maximum oxygen uptake in well-trained professional football players. We enrolled 43 Polish premier league soccer players. The mean age was 22.7±5.3 years. Our study showed decreased serum 25(OH)D3 levels in 74...
April 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28131505/duration-specific-running-intensities-of-australian-football-match-play
#11
Jace A Delaney, Heidi R Thornton, Darren J Burgess, Ben J Dascombe, Grant M Duthie
OBJECTIVES: To establish the position and duration-specific running demands of Australian Football (AF) competition for the prescription and monitoring of specific training drills. DESIGN: An observational time-motion analysis was performed on 40 professional AF players during 30 games throughout the 2014-15 competitive seasons. METHODS: Player movements were collected and peak values were calculated for moving averages of between 1-10min in duration for relative distance (mmin(-1)), high-speed relative distance (HSmmin(-1)), average acceleration/deceleration (ms(2)) and metabolic power (Pmet)...
January 23, 2017: Journal of Science and Medicine in Sport
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
#12
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/28095726/male-professional-footballers-experiences-of-mental-health-difficulties-and-help-seeking
#13
Susan Wood, Lesley K Harrison, Jo Kucharska
OBJECTIVES: Male professional footballers (soccer) represent an at-risk population of developing mental health difficulties and not accessing professional support. One in four current footballers report mental health difficulties. Higher prevalence is reported after retirement. This qualitative study aimed to provide in-depth insight into male professional footballers' lived experiences of mental health difficulties and help-seeking. METHODS: Seven participants were interviewed...
February 1, 2017: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/28068152/effect-of-exposure-type-and-timing-of-injuries-in-division-i-college-football-a-4-year-single-program-analysis
#14
Michael K Krill, James R Borchers, Joshua T Hoffman, Rachel L Tatarski, Timothy E Hewett
BACKGROUND: Football players compete with a high risk of injury due to the sport. With the recent efforts to improve safety, the National Collegiate Athletic Association (NCAA) established new terminology to clearly define exposure types and reduce the number of high contact exposures. OBJECTIVES: To compare football injury rates (IR) with a focus on game versus practice, time in season of injury, mechanism of injury and utilizing recent exposure types defined by the NCAA (live contact, full-pads and non-contact)...
January 19, 2017: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/28052052/physical-characteristics-and-performance-of-japanese-top-level-american-football-players
#15
Daichi Yamashita, Masaki Asakura, Yoshihiko Ito, Shinzo Yamada, Yosuke Yamada
This study aimed to compare the physical characteristics and performance between top-level non-professional football players in Japan and National Football League (NFL) Combine invited players and between top- and middle-level players in Japan in order to determine the factors that enhance performance in international and national competitions. One hundred sixty-eight American football players (>20 years) in Japan participated in an anthropometric (height and weight) and physical (vertical jump, long jump, 40-yard dash, pro-agility shuttle, three-cone drill, and bench press repetition test) measurement program based on the NFL Combine program to compete in the selection of candidates for the Senior World Championship...
November 5, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28027735/comparison-of-t2-relaxation-times-of-articular-cartilage-of-the-knee-in-elite-professional-football-players-and-age-and-bmi-matched-amateur-athletes
#16
C Behzadi, G H Welsch, A Laqmani, F O Henes, M G Kaul, G Schoen, G Adam, M Regier
OBJECTIVE: Recent investigation has underlined the potential of quantitative MR imaging to be used as a complementary tool for the diagnosis of cartilage degeneration at an early state. The presented study analyses T2* relaxation times of articular cartilage of the knee in professional athletes and compares the results to age- and BMI (Body Mass Index)-matched healthy amateur athletes. MATERIALS AND METHODS: 22 professional football players and 22 age- and BMI-matched individuals were underwent knee Magnetic Resonance Imaging (MRI) at 3T including qualitative and quantitative analysis...
January 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28019726/examining-the-relationships-between-challenge-and-threat-cognitive-appraisals-and-coaching-behaviours-in-football-coaches
#17
Martin Dixon, Martin J Turner, Jamie Gillman
Previous research demonstrates that sports coaching is a stressful activity. This article investigates coaches' challenge and threat cognitive appraisals of stressful situations and their impact on coaching behaviour, using Blascovich and Mendes' (2000) biopsychosocial model as a theoretical framework. A cross-sectional correlational design was utilised to examine the relationships between irrational beliefs (Shortened general attitude and belief scale), challenge and threat appraisals (Appraisal of life events scale), and coaching behaviours (Leadership scale for sports) of 105 professional football academy coaches...
December 26, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27996330/suicide-in-professional-american-football-players-in-the-past-95-years
#18
David Webner, Grant L Iverson
OBJECTIVE: To examine publicly-available information on all identified cases of suicide in active or former American professional football players between 1920 and the spring of 2015. DESIGN: Retrospective cohort study. SETTING: Professional American Football in the US. PARTICIPANTS: A cohort of 26 702 athletes who had died, retired or were currently playing in the NFL from nfl.com since 1920 was identified. MAIN OUTCOME MEASURES: Internet queries identifying 26 professional football players who completed suicide...
2016: Brain Injury: [BI]
https://www.readbyqxmd.com/read/27930446/prediction-of-overuse-injuries-in-professional-u18-u21-footballers-using-metrics-of-training-distance-and-intensity
#19
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
https://www.readbyqxmd.com/read/27919560/posterior-ankle-impingement-syndrome-in-football-players-case-series-of-26-elite-athletes
#20
Savaş Kudaş, Gürhan Dönmez, Çetin Işık, Mesut Çelebi, Nurdan Çay, Murat Bozkurt
OBJECTIVE: To describe a clinical treatment algorithm for posterior ankle impingement (PAI) syndrome in professional football players. MATERIAL AND METHODS: A case series of 26 elite professional football players diagnosed and treated for posterior ankle impingement syndrome were included for the study. All of the athletes received conservative treatment with physical therapy modalities initially. If the first line medical treatment and rehabilitation was ineffective to alleviate the symptoms, ultrasound-guided corticosteroid injection was proposed and thereafter the patients underwent posterior ankle arthroscopy if the complaints are still unresolved...
December 2016: Acta Orthopaedica et Traumatologica Turcica
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