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specificity in football

Kyle S Beyer, David H Fukuda, Michael J Redd, Jeffrey R Stout, Jay R Hoffman
Beyer, KS, Fukuda, DH, Redd, MJ, Stout, JR, and Hoffman, JR. Player selection bias in National Football League draftees. J Strength Cond Res 30(11): 2965-2971, 2016-Relative age effects (RAEs) have been studied as a potential factor associated with player selection bias in numerous sports. However, little research has examined the role of RAEs among National Football League (NFL) draftees. The purpose of the current study was to determine the existence of RAEs in NFL draftees from the last 10 NFL drafts. Draftee birth dates were collected and divided into calendar and scholastic quarters (SQ1-SQ4)...
November 2016: Journal of Strength and Conditioning Research
Heinz Lohrer, Tanja Nauck, Vasileios Korakakis, Nikos Malliaropoulos
BACKGROUND: The FASH (Functional Assessment Scale for Acute Hamstring Injuries) questionnaire has been recently developed as a disease-specific self-administered questionnaire for use in Greek, English, and German languages. Its psychometric qualities (validity and reliability) were tested only in Greek-speaking patients mainly representing track and field athletes. As hamstring injuries represent the most common football injury, we tested the validity and reliability of the FASH-G (G = German version) questionnaire in German-speaking footballers suffering from acute hamstring injuries...
October 24, 2016: Journal of Orthopaedic Surgery and Research
Naeim Bahrami, Dev Sharma, Scott Rosenthal, Elizabeth M Davenport, Jillian E Urban, Benjamin Wagner, Youngkyoo Jung, Christopher G Vaughan, Gerard A Gioia, Joel D Stitzel, Christopher T Whitlow, Joseph A Maldjian
Purpose To examine the effects of subconcussive impacts resulting from a single season of youth (age range, 8-13 years) football on changes in specific white matter (WM) tracts as detected with diffusion-tensor imaging in the absence of clinically diagnosed concussions. Materials and Methods Head impact data were recorded by using the Head Impact Telemetry system and quantified as the combined-probability risk-weighted cumulative exposure (RWECP). Twenty-five male participants were evaluated for seasonal fractional anisotropy (FA) changes in specific WM tracts: the inferior fronto-occipital fasciculus (IFOF), inferior longitudinal fasciculus, and superior longitudinal fasciculus (SLF)...
October 24, 2016: Radiology
Jared J Murray, Colleen M Renier, Jenny J Ahern, Barbara A Elliott
OBJECTIVE: To document neuromuscular training (NMT) availability and its relationship to anterior cruciate ligament (ACL) injuries in 4 major high school sports by gender, sport, and rural/urban geography, with the hypothesis that increased exposure to NMT would be associated with fewer ACL injuries. DESIGN: A retrospective cohort study. SETTING: All Minnesota high schools identified in the Minnesota State High School League (MSHSL) database for fall 2014 boys' football and soccer, and girls' volleyball and soccer...
October 17, 2016: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
Lynn Babcock, Cody S Olsen, David M Jaffe, Julie C Leonard
OBJECTIVE: The aim of this study was to ascertain potential factors associated with cervical spine injuries in children injured during sports and recreational activities. METHODS: This is a secondary analysis of a multicenter retrospective case-control study involving children younger than 16 years who presented to emergency departments after blunt trauma and underwent cervical spine radiography. Cases had cervical spine injury from sports or recreational activities (n = 179)...
September 30, 2016: Pediatric Emergency Care
A Prien, B Prinz, J Dvořák, A Junge
The aim of this study was to assess the prevalence of health problems and associated risk factors in former elite female football players. A cross-sectional research design was employed, using an online questionnaire on personal characteristics and health complaints during/after the career. One hundred fifty-two (response rate: 62.0%) former first German league players answered the survey. Around 70% described their current health as good or very good. Over half (57.9%) reported knee problems during the last 4 weeks while exercising and a third (33...
October 17, 2016: Scandinavian Journal of Medicine & Science in Sports
Lauren V Fortington, Dara M Twomey, Caroline F Finch
BACKGROUND: Head injuries, particularly concussion, are a major cause of concern in many sports, particularly the football codes, driving a need to better understand injury mechanisms and potential methods of prevention. The aim of this study was to describe the mechanisms and follow up care of concussion injuries sustained in adult male community Australian football to identify target areas for prevention and management. METHODS: Secondary analysis of injury data collected in a cluster randomised controlled trial in community Australian football across two states of Australia in 2007 and 2008...
December 2015: Injury Epidemiology
Vincent Gouttebarge, Urban Johnson, Pierre Rochcongar, Philippe Rosier, Gino Kerkhoffs
OBJECTIVE: The primary aim of this study was to determine the prevalence and one-season incidence of symptoms of common mental disorders (CMD; distress, anxiety/depression, sleep disturbance, eating disorders, adverse alcohol use) among European professional football referees. A secondary aim was to explore the view of European professional football referees on consequences, support and needs related to these symptoms. METHODS: An observational prospective cohort study with three measurements over a follow-up period of one season (2015-2016) was conducted among central or assistant professional football referees from Belgium, Finland, France, Germany, Norway, Russia, Scotland and Sweden...
October 14, 2016: Physician and Sportsmedicine
Michael W Collins, Anthony P Kontos, David O Okonkwo, Jon Almquist, Julian Bailes, Mark Barisa, Jeffrey Bazarian, O Josh Bloom, David Brody, Robert Cantu, Javier Cardenas, Jay Clugston, Randall Cohen, Ruben Echemendia, R J Elbin, Richard Ellenbogen, Janna Fonseca, Gerard Gioia, Kevin Guskiewicz, Robert Heyer, Gillian Hotz, Grant L Iverson, Barry Jordan, Geoffrey Manley, Joseph Maroon, Thomas McAllister, Michael McCrea, Anne Mucha, Elizabeth Pieroth, Kenneth Podell, Matthew Pombo, Teena Shetty, Allen Sills, Gary Solomon, Danny G Thomas, Tamara C Valovich McLeod, Tony Yates, Ross Zafonte
BACKGROUND: Conventional management for concussion involves prescribed rest and progressive return to activity. Recent evidence challenges this notion and suggests that active approaches may be effective for some patients. Previous concussion consensus statements provide limited guidance regarding active treatment. OBJECTIVE: To describe the current landscape of treatment for concussion and to provide summary agreements related to treatment to assist clinicians in the treatment of concussion...
October 12, 2016: Neurosurgery
Eik Bjerre, Ditte Marie Bruun, Anders Tolver, Klaus Brasso, Peter Krustrup, Christoffer Johansen, Robin Christensen, Mikael Rørth, Julie Midtgaard
BACKGROUND: Prostate cancer is the most common non-cutaneous malignancy in men. Today most patients may expect to live years following the diagnosis and may thus experience significant morbidity due to disease progression and treatment toxicity. In order to address some of these problems exercise has been suggested and previously studies have shown improvements of disease specific quality of life and a reduction in treatment-related toxicity. Cohort studies with long term follow up have suggested that physical activity is associated with improved survival in prostate cancer patients...
October 3, 2016: BMC Cancer
Brooke L Devlin, Michael D Leveritt, Michael Kingsley, Regina Belski
Sports nutrition professionals aim to influence nutrition knowledge, dietary intake and body composition to improve athletic performance. Understanding the interrelationships between these factors and how they vary across sports has the potential to facilitate better-informed and targeted sports nutrition practice. This observational study assessed body composition (DXA), dietary intake (multiple-pass 24-hour recall) and nutrition knowledge (two previously validated tools) of elite and sub-elite male players involved in two team-based sports; Australian football (AF) and soccer...
October 6, 2016: International Journal of Sport Nutrition and Exercise Metabolism
Pamela J Magee, Alison M Gallagher, Jacqueline M McCormack
Although dehydration of ≥2% body weight (BW) loss significantly impairs endurance performance, dehydration remains prevalent among athletes and may be owing to a lack of knowledge in relation to fluid requirements. The aim of this study was to assess the hydration status of university/club level athletes (n=430) from a range of sports/activities (army officer cadet training; bootcamp training; cycling; Gaelic Athletic Association camogie, football and hurling; golf; hockey; netball; rugby; running (sprinting and endurance); Shotokan karate and soccer) immediately before and after training/competition and to assess their nutritional knowledge...
October 6, 2016: International Journal of Sport Nutrition and Exercise Metabolism
Anna Mika, Łukasz Oleksy, Renata Kielnar, Ewa Wodka-Natkaniec, Magdalena Twardowska, Kamil Kamiński, Zbigniew Małek
BACKGROUND: The aim of this study is to assess if the application of different methods of active recovery (working the same or different muscle groups from those which were active during fatiguing exercise) results in significant differences in muscle performance and if the efficiency of the active recovery method is dependent upon the specific sport activity (training loads). DESIGN: A parallel group non-blinded trial with repeated measurements. METHODS: Thirteen mountain canoeists and twelve football players participated in this study...
2016: PloS One
Maria Kristina Parr, Marco H Blokland, Franz Liebetrau, Alexander H Schmidt, Thijs Meijer, Mijo Stanic, Dorota Kwiatkowska, Emilia Waraksa, Saskia S Sterk
The differentiation of clenbuterol abuse and unintentional ingestion by contaminated meat is crucial with respect to the valuation of an adverse analytical finding in human sports doping control. The proportion of the two enantiomers of clenbuterol may serve as potential discriminating parameter. For the determination of the individual enantiomers, specific methods were developed and validated for the different matrices under investigation based on chiral chromatography coupled to tandem mass spectrometry. Data from the administration of clenbuterol from a pharmaceutical preparation and from cattle meat and liver containing residues to humans are presented...
October 3, 2016: Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment
Karima Belhaj, Soumia Meftah, Siham Zahi, Fatima Lmidmani, Abdellatif Elfatimi
OBJECTIVE: Isokinetic evaluation allows accurate and reproducible measurement of dynamic muscle strength. It has several application areas, especially in sports, it allows the evaluation, rehabilitation and re-entrainment. It is rarely used for the hip joint. The objective of this study was to report the isokinetic profile of the abductor and adductor muscles of the hip in Moroccan professional players, while comparing players with a history of groin for those without medical history at the hip...
September 2016: Annals of Physical and Rehabilitation Medicine
I J R Tak, R F H Langhout, S Groters, A Weir, J H Stubbe, G M M J Kerkhoffs
OBJECTIVE: The association between groin pain and range of motion is poorly understood. The aim of this study was to develop a test to measure sport specific range of motion (SSROM) of the lower limb, to evaluate its reliability and describe findings in non-injured (NI) and injured football players. DESIGN: Case-controlled. SETTING: 6 Dutch elite clubs, 6 amateur clubs and a sports medicine practice. PARTICIPANTS: 103 NI elite and 83 NI amateurs and 57 football players with unilateral adductor-related groin pain...
July 31, 2016: Physical Therapy in Sport
Zachary Y Kerr, Janet E Simon, Dustin R Grooms, Karen G Roos, Randy P Cohen, Thomas P Dompier
BACKGROUND: Research has found that injury rates in football are higher in competition than during practice. However, there is little research on the association between injury rates and type of football practices and how these specific rates compare with those in competitions. PURPOSE: This study utilized data from the National Collegiate Athletic Association Injury Surveillance System (NCAA ISS) to describe men's collegiate football practice injuries (academic years 2004-2005 to 2008-2009) in 4 event types: competitions, scrimmages, regular practices, and walkthroughs...
September 2016: Orthopaedic Journal of Sports Medicine
Dimitris Vlachopoulos, Alan R Barker, Craig A Williams, Sigurbjörn A Arngrímsson, Karen M Knapp, Brad S Metcalf, Ioannis G Fatouros, Luis A Moreno, Luis Gracia-Marco
PURPOSE: Exercise is an effective approach for developing bone mass and adolescence is a key period to optimize bone health. However, sports specific training may have different effects on bone outcomes. This study examined the differences on bone outcomes between osteogenic (football) and non-osteogenic (swimming and cycling) sports and a control group in adolescent males. METHODS: One hundred twenty one males (13.1±0.1 years) were measured: 41 swimmers, 37 footballers, 29 cyclists and 14 controls...
September 14, 2016: Medicine and Science in Sports and Exercise
Vincenzo Rago, António N Rebelo, Federico Pizzuto, Daniel Barreira
BACKGROUND: The use of sand has been suggested as fitness-enhancing surface in field-based team sports. However, concerns have arisen in regard whether physical responses associated to sand training are sport-specific. We compared physical and technical demands during small-sided football games (4v4 + goalkeeper; SSGs) played on artificial turf and on sand. METHODS: Movement patterns, rating of perceived exertion (RPE) and technical parameters were obtained from eight adult male footballers (20...
September 15, 2016: Journal of Sports Medicine and Physical Fitness
Paulo Barreira, Mark A Robinson, Barry Drust, Niels Nedergaard, Raja Mohammed Firhad Raja Azidin, Jos Vanrenterghem
The aim of the present study was to examine reliability and construct convergent validity of Player Load™ (PL) from trunk-mounted accelerometry, expressed as a cumulative measure and an intensity measure (PL · min(-)(1)). Fifteen male participants twice performed an overground football match simulation that included four different multidirectional football actions (jog, side cut, stride and sprint) whilst wearing a trunk-mounted accelerometer inbuilt in a global positioning system unit. Results showed a moderate-to-high reliability as indicated by the intra-class correlation coefficient (0...
September 6, 2016: Journal of Sports Sciences
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