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https://www.readbyqxmd.com/read/28634682/searching-for-the-sweet-spot-the-foot-rotation-and-parallel-engagement-of-ankle-ligaments-in-maximizing-injury-tolerance
#1
Bingbing Nie, Jason L Forman, Alexander R Mait, John-Paul Donlon, Matthew B Panzer, Richard W Kent
Ligament sprains, defined as tearing of bands of fibrous tissues within ligaments, account for a majority of injuries to the foot and ankle complex in field-based sports. External rotation of the foot is considered the primary injury mechanism of syndesmotic ankle sprains with concomitant flexion and inversion/eversion associated with particular patterns of ligament trauma. However, the influence of the magnitude and direction of loading vectors to the ankle on the in situ stress state of the ligaments has not been quantified in the literature...
June 20, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/28632062/skeleton-sled-velocity-profiles-a-novel-approach-to-understand-critical-aspects-of-the-elite-athletes-start-phases
#2
Steffi L Colyer, Keith A Stokes, James L J Bilzon, Aki I T Salo
The development of velocity across the skeleton start is critical to performance, yet poorly understood. We aimed to understand which components of the sled velocity profile determine performance and how physical abilities influence these components. Thirteen well-trained skeleton athletes (>85% of athletes in the country) performed dry-land push-starts alongside countermovement jump and sprint tests at multiple time-points. A magnet encoder attached to the sled wheel provided velocity profiles, which were characterised using novel performance descriptors...
February 28, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28630572/the-role-of-a-relative-age-effect-in-the-7-th-international-children-s-winter-games-2016-and-the-influence-of-biological-maturity-status-on-selection
#3
Lisa Müller, Carolin Hildebrandt, Christian Raschner
The aim of this study was to analyse the role of a relative age effect (RAE) and to investigate the influence of biological maturity status on the RAE at the 7(th) International Children`s Winter Games. The birth dates of all 572 participants (365 males, 207 females) were analysed, and the biological maturity status of 384 athletes (243 males, 141 females) was assessed by the age at peak height velocity (APHV) method. A RAE was present in the total sample (χ(2) = 67.81; p < 0.001), and among both male (χ(2) = 49...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28629589/physical-exercise-and-dna-injury-good-or-evil
#4
Elisa Danese, Giuseppe Lippi, Fabian Sanchis-Gomar, Giorgio Brocco, Manfredi Rizzo, Maciej Banach, Martina Montagnana
Regular, low-intensity physical activity is currently advocated for lowering the risk of developing many acute and especially chronic diseases. However, several lines of evidence attest that strenuous exercise may enhance inflammation and trigger the generation of free radical-mediated damage, thus overwhelming the undisputable benefits of regular, medium-intensity physical activity. Since reactive oxygen species are actively generated during high-intensity exercise, and these reactive compounds are known to impact DNA stability, we review here the current evidence about strenuous exercise and DNA injury...
2017: Advances in Clinical Chemistry
https://www.readbyqxmd.com/read/28622025/comparison-of-concussion-rates-between-ncaa-division-i-and-division-iii-men-s-and-women-s-ice-hockey-players
#5
John M Rosene, Bryan Raksnis, Brie Silva, Tyler Woefel, Paul S Visich, Thomas P Dompier, Zachary Y Kerr
BACKGROUND: Examinations related to divisional differences in the incidence of sports-related concussions (SRC) in collegiate ice hockey are limited. PURPOSE: To compare the epidemiologic patterns of concussion in National Collegiate Athletic Association (NCAA) ice hockey by sex and division. STUDY DESIGN: Descriptive epidemiology study. METHODS: A convenience sample of men's and women's ice hockey teams in Divisions I and III provided SRC data via the NCAA Injury Surveillance Program during the 2009-2010 to 2014-2015 academic years...
June 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28619395/the-new-front-in-the-war-on-doping-amateur-athletes
#6
April D Henning, Paul Dimeo
The war on drugs is usually associated with criminal policies aimed at stemming consumption of drugs such as heroin, cocaine, and cannabis, less so with enhancement drugs like those used in sport. As drug use in sport, or doping, has become more visibly widespread, policies aimed at combating the issue have become more restrictive, intrusive, and harsh. In this article we draw new comparisons between the wider war on drugs and recent developments in sports anti-doping. We identify a growing trend towards criminalisation of traffickers and users, and associate that with another growing trend: the testing of amateur athletes...
June 12, 2017: International Journal on Drug Policy
https://www.readbyqxmd.com/read/28614164/multi-component-musculoskeletal-movement-assessment-tools-a-systematic-review-and-critical-appraisal-of-their-development-and-applicability-to-professional-practice
#7
Hunter Bennett, Kade Davison, John Arnold, Kevin Norton, Flynn Slattery, Max Martin
Multi-component movement assessment tools have become commonplace to measure movement quality, proposing to indicate injury risk and performance capabilities. Despite popular use, there has been no attempt to compare the components of each tool reported in the literature, the processes in which they were developed, or the underpinning rationale for their included content. As such, the objective of this systematic review was to provide a comprehensive summary of current movement assessment tools, and appraise the evidence supporting their development...
June 12, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28612890/technology-in-rehabilitation-comparing-personalised-and-global-classification-methodologies-in-evaluating-the-squat-exercise-with-wearable-imus
#8
Martin A O'Reilly, Darragh Whelan, Tomás E Ward, Eamonn Delahunt, Brian Caulfield
BACKGROUND: The barbell squat is a popularly used lower limb rehabilitation exercise. It is also an integral exercise in injury risk screening protocols. To date athlete/patient technique has been assessed using expensive laboratory equipment or subjective clinical judgement; both of which are not without shortcomings. Inertial measurement units (IMUs) may offer a low cost solution for the objective evaluation of athlete/patient technique. However, it is not yet known if global classification techniques are effective in identifying naturally occurring, minor deviations in barbell squat technique...
June 14, 2017: Methods of Information in Medicine
https://www.readbyqxmd.com/read/28611008/the-female-athlete-body-fab-study-rationale-design-and-baseline-characteristics
#9
Tiffany M Stewart, Tarryn Pollard, Tom Hildebrandt, Robbie Beyl, Nicole Wesley, Lisa Smith Kilpela, Carolyn Black Becker
BACKGROUND: Eating Disorders (EDs) are serious psychiatric illnesses marked by psychiatric comorbidity, medical complications, and functional impairment. Research indicates that female athletes are often at greater risk for developing ED pathology versus non-athlete females. The Female Athlete Body (FAB) study is a three-site, randomized controlled trial (RCT) designed to assess the efficacy of a behavioral ED prevention program for female collegiate athletes when implemented by community providers...
June 10, 2017: Contemporary Clinical Trials
https://www.readbyqxmd.com/read/28606607/state-of-the-art-review-atrial-fibrillation-in-athletes
#10
REVIEW
M Darragh Flannery, Jonathan M Kalman, Prashanthan Sanders, André La Gerche
Exercise has substantial health benefits with pleomorphic vascular, metabolic, psychological and anti-neoplastic actions resulting in improved quality of life and longevity. Despite these many benefits, numerous studies have shown that endurance athletes are more likely to develop atrial fibrillation (AF) than non-athletes. The type, intensity and amount of sport appears to influence the risk of developing AF. Several endurance sport activities have been shown to increase the risk of developing AF but an excess in AF has not been shown in non-endurance sports...
June 3, 2017: Heart, Lung & Circulation
https://www.readbyqxmd.com/read/28605277/ground-reaction-forces-during-sprinting-in-unilateral-transfemoral-amputees
#11
Atsushi Makimoto, Yoko Sano, Satoru Hashizume, Akihiko Murai, Yoshiyuki Kobayashi, Hiroshi Takemura, Hiroaki Hobara
Understanding the characteristics of ground reaction forces (GRFs) on both limbs during sprinting in unilateral amputees wearing running-specific prostheses would provide important information that could be utilized in the evaluation of athletic performance and development of training methods in this population. The purpose of this study was to compare GRFs between intact and prosthetic limbs during sprinting in unilateral transfemoral amputees wearing running-specific prostheses. Nine sprinters with unilateral transfemoral amputation wearing the same type of prosthesis performed maximal sprinting on a 40 m of runway...
June 12, 2017: Journal of Applied Biomechanics
https://www.readbyqxmd.com/read/28605273/improving-the-prediction-of-maturity-from-anthropometric-variables-using-a-maturity-ratio
#12
Job Fransen, Stephen Bush, Stephen Woodcock, Andrew Novak, Dieter Deprez, Adam D G Baxter-Jones, Roel Vaeyens, Matthieu Lenoir
PURPOSE: This study aimed to improve the prediction accuracy of Age at Peak Height Velocity (APHV) from anthropometric assessment using non-linear models and a maturity ratio rather than a maturity offset. METHODS: The dataset used to develop the original prediction equations was used to test a new prediction model, utilising the maturity ratio and a polynomial prediction equation. This model was then applied to a sample of male youth academy soccer players (n = 1330) to validate the new model in youth athletes...
June 12, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28605209/pacing-and-self-regulation-important-skills-for-talent-development-in-endurance-sports
#13
Marije T Elferink-Gemser, Florentina J Hettinga
Pacing has been characterized as a multi-faceted goal-directed process of decision-making in which athletes need to decide how and when to invest their energy during the race, a process essential for optimal performance. Both physiological as well as psychological characteristics associated with adequate pacing and performance are known to develop with age. Consequently, the multi-faceted skill of pacing might be under construction throughout adolescence as well. Therefore, we propose that the complex skill of pacing is a potential important performance characteristic for talented youth athletes, that needs to be developed throughout adolescence...
June 12, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28605065/injuries-in-youth-track-and-field-are-perceived-to-have-multiple-level-causes-that-call-for-ecological-holistic-developmental-interventions-a-national-sporting-community-perceptions-and-experiences
#14
Jenny Jacobsson, Daniel Bergin, Toomas Timpka, James M Nyce, Örjan Dahlström
Engaging in competitive sports as a youth can have many health benefits, but recent studies also report a high risk for injury. The long-term purpose of this Swedish research program is to develop a framework for safe track and field training for young athletes (aged 12-15 years). The aim of this study was to establish what is perceived to contribute and cause injuries in youth track and field by compiling the best available experiential knowledge about the underlying factors and use this knowledge to identify appropriate areas to handle these in practical ways...
June 12, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28604495/when-do-patients-return-to-physical-activities-and-athletics-after-scoliosis-surgery-a-validated-patient-questionnaire-based-study
#15
Vishal Sarwahi, Stephen Wendolowski, Rachel Gecelter, Kathleen Maguire, Melanie Gambassi, Dana Orlando, Yungtai Lo, Terry Amaral
STUDY DESIGN: A retrospective chart review with a survey OBJECTIVES.: This study seeks to determine time of return to normal, physical and athletic activities and delaying factors after all pedicle screw fixation. SUMMARY OF BACKGROUND DATA: Return to athletic activity after PSF in AIS is largely dependent on surgeon's philosophy. Some allow contact and collision sports by 6 and 12 months, while others avoid contact sports for 1 year and never allow collision sports...
June 9, 2017: Spine
https://www.readbyqxmd.com/read/28603507/making-champs-and-super-champs-current-views-contradictions-and-future-directions
#16
REVIEW
David J Collins, Aine Macnamara
In our 2016 paper (Collins et al., 2016a), we proposed that superchamps (athletes who have achieved the highest level in their sport) were differentiated from their less successful counterparts by their use of positive proactive coping and a "learn from it" approach to challenge. This skill-based focus to talent development (TD) is supported extensively in the literature (e.g., MacNamara et al., 2010a,b) and suggests that the differences between levels of adult achievement relate more to what performers bring to the challenges than what they experience (Collins et al...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28601782/neuropraxia-following-resection-of-a-retroperitoneal-liposarcoma
#17
Stevenson Tsiao, Nail Aydin, Subhasis Misra
BACKGROUND: This is a unique case of neuropraxia of femoral nerve seen after resection of retroperitoneal liposarcoma which has not been reported before in the literature. INTRODUCTION: Neuropraxia, a transient paralysis due to blockage of nerve conduction, commonly associated with athletes and orthopedic procedures, has not been previously reported as a complication following resection of retroperitoneal sarcoma. CASE: This is an 81-year-old female who, on CT for evaluation of her atherosclerosis, was found to have an incidental right-sided retroperitoneal mass extending from the right renal capsule inferiorly through the inguinal canal...
2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28599081/mechanisms-of-exercise-induced-bronchoconstriction-in-athletes-current-perspectives-and-future-challenges
#18
REVIEW
Mariana Couto, Marcin Kurowski, André Moreira, Dominique M A Bullens, Kai-Håkon Carlsen, Luís Delgado, Marek L Kowalski, Sven F Seys
The evidence of exercise-induced bronchoconstriction (EIB) without asthma (EIBwA ) occurring in athletes led to speculate about different endotypes inducing respiratory symptoms within athletes. Classical postulated mechanisms for bronchial obstruction in this population include the osmotic and the thermal hypotheses. More recently, the presence of epithelial injury and inflammation in the airways of athletes was demonstrated. In addition, neuronal activation has been suggested as a potential modulator of bronchoconstriction...
June 9, 2017: Allergy
https://www.readbyqxmd.com/read/28597618/effects-of-resistance-training-overtraining-and-early-specialization-on-youth-athletes
#19
Benjamin K Walters, Connor R Read, A Reed Estes
INTRODUCTION: In 2014, 60 million youth ages 6-18 participated in some form of generalized athletics. 3.5 million children are injured annually participating in organized sport or recreational activities. While sound physical education can decrease the burden of youth sports injuries, the median annual physical education budget of $764 for United States elementary, middle and high schools may not allow enough flexibility to apply evidenced-based guidelines. EVIDENCE ACQUISITION: The topics were selected after a careful review of the 2016 National Strength and Conditioning Association Position Statement on Long-Term Athletic Development...
June 8, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28595235/a-warm-up-routine-that-incorporates-a-plyometric-protocol-potentiates-the-force-generating-capacity-of-the-quadriceps-muscles
#20
Mariska Johnson, J Pierre Baudin, Alejandro L Ley, David F Collins
This study was designed to investigate whether a warm-up routine that incorporates drop jumps, induces post-activation potentiation (PAP), and if so, assess the magnitude and time course of the induced PAP. Participants performed a standard warm-up that incorporated either drop jumps (plyometric protocol) or a low-paced walk (control protocol). PAP was assessed by changes in electrically-evoked isometric muscle twitches recorded throughout both protocols. The plyometric protocol increased peak twitch torque (PTT), rate of force development (RTD) and impulse significantly (by 23%, 39% and 46%, respectively) with no change in the amplitude of simultaneously-evoked M-waves, indicating that the augmented torque was due to PAP...
June 8, 2017: Journal of Strength and Conditioning Research
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