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https://www.readbyqxmd.com/read/28314090/prevalence-age-at-onset-and-risk-factors-of-self-reported-asthma-among-swedish-adolescent-elite-cross-country-skiers
#1
L M Eriksson, T Irewall, Anne Lindberg, Nikolai Stenfors
The objective of the study was to compare the prevalence of self-reported physician-diagnosed asthma and age at asthma onset between Swedish adolescent elite skiers and a reference group and to assess risk factors associated with asthma. Postal questionnaires were sent to 253 pupils at the Swedish National Elite Sport Schools for cross-country skiing, biathlon, and ski-orienteering ("skiers") and a random sample of 500 adolescents aged 16-20, matched for sport school municipalities ("reference"). The response rate was 96% among the skiers and 48% in the reference group...
March 17, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28298059/groin-problems-in-male-soccer-players-are-more-common-than-previously-reported
#2
Joar Harøy, Ben Clarsen, Kristian Thorborg, Per Hölmich, Roald Bahr, Thor Einar Andersen
BACKGROUND: The majority of surveillance studies in soccer have used a time-;loss injury definition, and many groin problems result from overuse, leading to gradually increasing pain and/or reduced performance without necessarily causing an absence from soccer training or match play. Thus, the magnitude of groin problems in soccer has probably been underestimated in previous studies based on traditional injury surveillance methods. PURPOSE: To investigate the prevalence of groin problems among soccer players of both sexes and among male soccer players at different levels of play through a new surveillance method developed to capture acute and overuse problems...
February 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28295487/sperm-dna-fragmentation-as-a-result-of-ultra-endurance-exercise-training-in-male-athletes
#3
D Vaamonde, C Algar-Santacruz, A Abbasi, J M García-Manso
Intensive sports practice seems to exert negative effects on semen parameters; in order to assess these effects, the objective of this study was to assess semen, including DNA fragmentation, and hormone parameters in elite triathletes. Twelve high-level triathletes preparing for a National Triathlon Championship participated in the study. The qualitative sperm parameters analysed were volume, sperm count, motility, morphology and DNA fragmentation; when needed, additional testing was performed. Assessed hormones were testosterone (T), cortisol (C) and testosterone-cortisol ratio (T/C)...
March 15, 2017: Andrologia
https://www.readbyqxmd.com/read/28294577/the-enigma-of-inhaled-salbutamol-and-sport-unresolved-after-45-years
#4
K D Fitch
During the past 45 years, there have been more changes on the World Anti-Doping Agency's (WADA) Prohibited List (the List) to the status of inhaled salbutamol than any other substance. With 658 athletes, 6.1% of all participating athletes approved to inhale salbutamol at the 2008 Beijing Games, it is one of the medications used most frequently by Olympic athletes. Nevertheless, since the 2008 Games, WADA has made numerous changes to inhaled salbutamol on the List including prohibiting its use, then a year later permitting it without prior notification and recommending a pharmacokinetic study if an athlete exceeds the urinary threshold of 1000 ng/mL...
March 11, 2017: Drug Testing and Analysis
https://www.readbyqxmd.com/read/28287028/technique-analysis-in-elite-athletes-using-principal-component-analysis
#5
Øyvind Gløersen, Håvard Myklebust, Jostein Hallén, Peter Federolf
The aim of this study was to advance current movement analysis methodology to enable a technique analysis in sports facilitating (1) concurrent comparison of the techniques between several athletes; (2) identification of potentially beneficial technique modifications and (3) a visual representation of the findings for feedback to the athletes. Six elite cross-country skiers, three world cup winners and three national elite, roller ski skated using the V2 technique on a treadmill while their movement patterns were recorded using 41 reflective markers...
March 13, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28282752/discovering-frequently-recurring-movement-sequences-in-team-sport-athlete-spatiotemporal-data
#6
Alice J Sweeting, Robert J Aughey, Stuart J Cormack, Stuart Morgan
Athlete external load is typically analysed from predetermined movement thresholds. The combination of movement sequences and differences in these movements between playing positions is also currently unknown. This study developed a method to discover the frequently recurring movement sequences across playing position during matches. The external load of 12 international female netball athletes was collected by a local positioning system during four national-level matches. Velocity, acceleration and angular velocity were calculated from positional (X, Y) data, clustered via one-dimensional k-means and assigned a unique alphabetic label...
February 9, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28282745/overuse-wrist-injuries-in-young-athletes-what-do-sports-physicians-consider-important-signals-and-functional-limitations
#7
Laura S Kox, P Paul F M Kuijer, Jip Opperman, Gino M M J Kerkhoffs, Mario Maas, Monique H W Frings-Dresen
This study's objective was to collect items from experienced sports physicians, relating to the presence and severity of overuse wrist injuries in young athletes, for developing a measurement instrument for signals of overuse wrist injury. Seven Dutch elite sports physicians involved in guidance and treatment of young athletes in wrist-loading sports (gymnastics, tennis, judo, field hockey, volleyball and rowing) participated in a focus group. They discussed signals and limitations related to overuse wrist injuries in young athletes...
February 21, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28282471/how-much-training-is-too-much
#8
EDITORIAL
Bronwen J Ackermann
Managing training practices in elite performance domains is recognised to play an important role in preventing musculoskeletal overload, and hence reducing the risk of overuse-related injuries. In international studies spanning four decades, the duration of playing, especially in combination with sudden increases in playing and inadequate rest breaks, remains one of the most common causes of injuries. With musculoskeletal performance in occupational and sports domains, both the work:rest ratio and the acute:chronic workload ratio are considered critical in making an approximate determination in the length of training sessions...
March 2017: Medical Problems of Performing Artists
https://www.readbyqxmd.com/read/28281390/reliability-of-lower-limb-biomechanics-in-two-sport-specific-sidestep-cutting-tasks
#9
Kam-Ming Mok, Roald Bahr, Tron Krosshaug
The purpose of this study was to assess the within- and between-session reliability of lower limb biomechanics in two sport-specific sidestep cutting tasks performed by elite female handball and football (soccer) athletes. Moreover, we aimed at determining the minimum number of trials necessary to obtain a reliable measure. Nineteen elite female handball and 22 elite female football (soccer) athletes (M ± SD: 22 ± 4 yrs old, 168 ± 5 cm, 66 ± 8 kg) were tested. The reliability was quantified by intra-class correlations (ICCs), typical error and Spearman's rank correlation...
March 10, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28278378/subsequent-injuries-are-more-common-than-injury-recurrences
#10
Caroline F Finch, Jill Cook, Breanne E Kunstler, Muhammad Akram, John Orchard
BACKGROUND: It is known that some people can, and do, sustain >1 injury over a playing season. However, there is currently little high-quality epidemiological evidence about the risk of, and relationships between, multiple and subsequent injuries. PURPOSE: To describe the subsequent injuries sustained by Australian Football League (AFL) players over 1 season, including their most common injury diagnoses. STUDY DESIGN: Cohort study; Level of evidence, 3...
March 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28276913/postural-stability-clicker-reaction-time-and-bow-draw-force-predict-performance-in-elite-recurve-archery
#11
Wayne Spratford, Rhiannon Campbell
Recurve archery is an Olympic sport that requires extreme precision, upper body strength and endurance. The purpose of this research was to quantify how postural stability variables both pre- and post-arrow release, draw force, flight time, arrow length and clicker reaction time, collectively, impacted on the performance or scoring outcomes in elite recurve archery athletes. Thirty-nine elite-level recurve archers (23 male and 16 female; mean age = 24.7 ± 7.3 years) from four different countries volunteered to participate in this study prior to competing at a World Cup event...
February 14, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28276909/how-should-we-categorise-self-reported-data-on-subsequent-injuries
#12
Philip von Rosen, Annette Heijne
Classifying subsequent injuries is of high importance in injury epidemiology since a previous injury has been reported to increase the risk of a new injury or increase the risk of a more severe injury. Multiple reports have shown that self-reported data provide an extensive view of an injury problem and add valuable information to the understanding of the athlete's health. The purpose of this study was to display a method that can be used to facilitate classification of subsequent injuries and to discuss challenges faced when categorising subsequent injuries based on self-reported data...
March 5, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28271812/elite-youth-sports-from-best-pediatric-science-practice-to-sports-practice-2016
#13
Craig A Williams
In my 2015 editorial, I selected two research publications with a focus on an applied sports sciences perspective. This year I have chosen to focus on two publications from a methodological viewpoint, highlighting the importance of laboratory procedures and extraction of data through a systematic review respectively. The first publication by Leites and colleagues (J Appl Physiol) addresses questions in relation to thermoregulation and carbohydrate metabolism in young people. This topic is difficult to conduct due to additional ethical and safety concerns due to exercising in the heat...
February 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28267868/validity-of-the-spex-sports-injury-surveillance-system-for-time-loss-and-medical-attention-injuries-in-sports
#14
M Møller, N Wedderkopp, G Myklebust, M Lind, H Sørensen, J J Hebert, C A Emery, J Attermann
The accurate measurement of sport exposure time and injury occurrence is key to effective injury prevention and management. Current measures are limited by their inability to identify all types of sport-related injury, narrow scope of injury information, or lack the perspective of the injured athlete. The aims of the study were to evaluate the proportion of injuries and the agreement between sport exposures reported by the SMS messaging and follow-up telephone part of the SMS, Phone, and medical staff Examination (SPEx) sports injury surveillance system when compared to measures obtained by trained on-field observers and medical staff (comparison method)...
March 7, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28259770/a-prospective-investigation-of-changes-in-the-sensorimotor-system-following-sports-concussion-an-exploratory-study
#15
Julie A Hides, Melinda M Franettovich Smith, M Dilani Mendis, Nigel A Smith, Andrew J Cooper, Julia Treleaven, Felix Leung, Andrew J Gardner, Paul McCrory, Nancy L Low Choy
BACKGROUND: Sports concussion is a risk for players involved in high impact, collision sports. Post-concussion, the majority of symptoms subside within 7-10 days, but can persist in 10-20% of athletes. Understanding the effects of sports concussion on sensorimotor systems could inform physiotherapy treatment. OBJECTIVE: To explore changes in sensorimotor function in the acute phase following sports concussion. DESIGN: Prospective cohort study...
February 24, 2017: Musculoskelet Sci Pract
https://www.readbyqxmd.com/read/28256397/the-effects-of-a-combined-static-dynamic-stretching-protocol-on-athletic-performance-in-elite-gaelic-footballers-a-randomised-controlled-crossover-trial
#16
Martin Loughran, Philip Glasgow, Chris Bleakley, Joseph McVeigh
OBJECTIVES: To determine the effect of three different static-dynamic stretching protocols on sprint and jump performance in Gaelic footballers. DESIGN: Double-blind, controlled, crossover trial. SETTING: Sports Institute research environment. PARTICIPANTS: Seventeen male elite level Gaelic footballers, aged 18-30 years, completed three stretching protocols. MAIN OUTCOME MEASURES: Athletic performance was measured by countermovement jump height and power, and timed 10 m, 20 m, and 40 m sprints...
December 1, 2016: Physical Therapy in Sport
https://www.readbyqxmd.com/read/28253061/a-comparative-study-of-sleep-and-mood-between-young-elite-athletes-and-age-matched-controls
#17
Anette Harris, Hilde Gundersen, Pia Mørk Andreassen, Eirunn Thun, Bjørn Bjorvatn, Ståle Pallesen
BACKGROUND: Sleep and mood have seldom been compared between elite athletes and non-elite athletes, although potential differences suggest that physical activity may affect these parameters. This study aims to explore whether adolescent elite athletes differ from controls in terms of sleep, positive affect (PA) and negative affect (NA). METHODS: Forty-eight elite athletes and 26 controls participating in organized and non-organized sport completed a questionnaire, and a seven-day sleep diary...
March 2, 2017: Journal of Physical Activity & Health
https://www.readbyqxmd.com/read/28253027/wingate-test-is-a-strong-predictor-of-1500m-performance-in-elite-speed-skaters
#18
Nico Hofman, Jac Orie, Marco J M Hoozemans, Carl Foster, Jos J de Koning
Wingate test scores are strongly associated with anaerobic capacity in athletes involved in speed-endurance sports. In speed skating Wingate results are known to predict performance cross-sectionally, but have not been investigated relative to their ability to predict performance longitudinally. PURPOSE: To investigate whether Wingate tests performed during summer training are predictive of 1500m speed skating performance the subsequent winter in elite speed skaters. METHODS: Wingate test results from the summer training periods and 1500m performances during the subsequent winter were analyzed over a 3-year period, in 5 female and 8 male elite (Olympic, World Championship and World Cup medalists) speed skaters...
March 2, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28249857/application-of-the-subsequent-injury-categorisation-model-for-longitudinal-injury-surveillance-in-elite-rugby-and-cricket-intersport-comparisons-and-inter-rater-reliability-of-coding
#19
Isabel S Moore, Stephen Mount, Prabhat Mathema, Craig Ranson
BACKGROUND: When an athlete has more than one injury over a time period, it is important to determine if these are related to each other or not. The subsequent injury categorisation (SIC) model is a method designed to consider the relationship between an index injury and subsequent injury(ies). OBJECTIVE: The primary aim was to apply SIC to longitudinal injury data from two team sports: rugby union and cricket. The secondary aim was to determine SIC inter-rater reliability...
March 1, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28241495/state-of-the-art-methods-for-skeletal-muscle-glycogen-analysis-in-athletes-the-need-for-novel-non-invasive-techniques
#20
REVIEW
Jacob Greene, Julien Louis, Olga Korostynska, Alex Mason
Muscle glycogen levels have a profound impact on an athlete's sporting performance, thus measurement is vital. Carbohydrate manipulation is a fundamental component in an athlete's lifestyle and is a critical part of elite performance, since it can provide necessary training adaptations. This paper provides a critical review of the current invasive and non-invasive methods for measuring skeletal muscle glycogen levels. These include the gold standard muscle biopsy, histochemical analysis, magnetic resonance spectroscopy, and musculoskeletal high frequency ultrasound, as well as pursuing future application of electromagnetic sensors in the pursuit of portable non-invasive quantification of muscle glycogen...
February 23, 2017: Biosensors
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