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Sport performance

David L Carey, Kay M Crossley, Rod Whiteley, Andrea Mosler, Kok-Leong Ong, Justin Crow, Meg E Morris
PURPOSE: To evaluate common modelling strategies in training load and injury risk research when modelling continuous variables and interpreting continuous risk estimates; and present improved modelling strategies. METHOD: Workload data were pooled from Australian football (n=2,550) and soccer (n=23,742) populations to create a representative sample of acute:chronic workload ratio observations for team sports. Injuries were simulated in the data using three pre-defined risk profiles (U-shaped, flat and S-shaped)...
June 21, 2018: Medicine and Science in Sports and Exercise
Danielle Lovett-Carter, Amritpal S Jawanda, Ailish Hannigan
OBJECTIVES: Femoroacetabular impingement (FAI) poses a threat to athletes' capacity to compete. This review aims to estimate the rate of return to sport after hip arthroscopy for treatment of FAI as well as identify factors that may affect athletes' outcomes. DESIGN: Meta-analysis. METHODS: Four databases (EMBASE, PubMed, Web of Science, and Cochrane) were searched in July 2015 by 2 reviewers. Studies were required to include athletes who were treated with hip arthroscopy for symptomatic FAI and also report return to sport as an outcome...
June 21, 2018: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
David M Siebert, Ashwin L Rao
CONTEXT: Recombinant human growth hormone (rHGH) has become a target of abuse in the sporting world. Conversely, sports medicine clinicians may encounter athletes using rHGH to achieve normalcy in the context of growth hormone (GH) deficiency. EVIDENCE ACQUISITION: Medline and PubMed databases were queried using the following keywords: GH, GH physiology, GH deficiency, acromegaly, GH athlete, GH sports, GH athletic performance, and GH deficiency concussion. Articles focusing on GH physiology, deficiency, excess, and its effects in both deficient and healthy patients were included...
June 1, 2018: Sports Health
Jacqueline M Maher, Emily M Brook, Christopher Chiodo, Jeremy Smith, Eric M Bluman, Elizabeth G Matzkin
BACKGROUND: Lower extremity chronic exertional compartment syndrome (CECS) can negatively affect exercise and activity and may require operative intervention to release the fascia. Few studies have evaluated or compared patient-reported outcomes for bilateral versus single-leg staged fasciotomy and number of compartments released. METHODS: A total of 27 eligible patients who underwent a fasciotomy procedure for CECS at a single institution were identified. A retrospective review of the medical record was performed, and individuals were contacted by phone to collect patient-reported outcomes, including ability to return to desired exercise level, postoperative expectation assessment, European Quality of Life-Five Dimensions, and the Foot and Ankle Ability Measure sports subscale...
June 1, 2018: Foot & Ankle Specialist
Marialuisa Gandolfi, Matteo Ricci, Elena Sambugaro, Nicola Valè, Eleonora Dimitrova, Andrea Meschieri, Silvano Grazioli, Alessandro Picelli, Calogero Foti, Francesco Rulli, Nicola Smania
PURPOSE: To evaluate the time course of sensorimotor integration processes involved in balance capability during 1-year follow-up after arthroscopic anterior cruciate ligament (ACL) reconstruction. To evaluate whether an association exists between balance performance and semitendinosus muscle morphometry features. METHODS: Twenty-seven patients (mean age 29.6 ± 10.8 years) were prospectively followed with stabilometry and ultrasound at 3 months (T0), 6 months (T1), and 1 year (T2) after arthroscopic ACL reconstruction...
June 21, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
Umile Giuseppe Longo, Laura Risi Ambrogioni, Mauro Ciuffreda, Nicola Maffulli, Vincenzo Denaro
Introduction: Sudden cardiac death (SCD) of young athletes during competition or training is a tragic event. The long QT syndrome (LQTS) is an arrythmogenic disorder characterized by prolonged ventricular repolarization leading to torsade de pointes evident at electrocardiogram (ECG). Implantable cardioverter defibrillator is an option to revert ventricular fibrillation to sinus rhythm, although the implantation may result in denial of sports participations to the athlete. The authors reviewed the current literature on LQTS in young athletes, to clarify the role of different screening technologies to prevent SCD...
June 20, 2018: British Medical Bulletin
Marta Castañer, Juan Andueza, Raúl Hileno, Silvia Puigarnau, Queralt Prat, Oleguer Camerino
Laterality is a key aspect of the analysis of basic and specific motor skills. It is relevant to sports because it involves motor laterality profiles beyond left-right preference and spatial orientation of the body. The aim of this study was to obtain the laterality profiles of young athletes, taking into account the synergies between the support and precision functions of limbs and body parts in the performance of complex motor skills. We applied two instruments: (a) MOTORLAT, a motor laterality inventory comprising 30 items of basic, specific, and combined motor skills, and (b) the Precision and Agility Tapping over Hoops (PATHoops) task, in which participants had to perform a path by stepping in each of 14 hoops arranged on the floor, allowing the observation of their feet, left-right preference and spatial orientation...
2018: Frontiers in Psychology
Amber E Rowell, Robert J Aughey, William G Hopkins, Alizera Esmaeili, Brendan H Lazarus, Stuart J Cormack
Introduction: Training load and other measures potentially related to match performance are routinely monitored in team-sport athletes. The aim of this research was to examine the effect of training load on such measures and on match performance during a season of professional football. Materials and Methods: Training load was measured daily as session duration times perceived exertion in 23 A-League football players. Measures of exponentially weighted cumulative training load were calculated using decay factors representing time constants of 3-28 days...
2018: Frontiers in Physiology
Mouadh Nefiss, Anis Tebourbi, Aymen Ben Maatoug, Ramzi Bouzidi
Paralysis of the femoral nerve secondary to iliopsoas haematoma is a rare post-traumatic complication. Because of the large differential diagnosis, a high level of suspicion is required for its early recognition. Treatment modalities are controversial due to the rarity of this entity. An 18-year-old student presented with complete paralysis of the knee extensors and a sensory deficit on the anterior side of the thigh 5 weeks after a sport accident. MRI of the lesser pelvis showed an iliopsoas haematoma. Surgical decompression was performed and recovery was complete at 6 months of follow-up...
June 21, 2018: BMJ Case Reports
Ricardo Schultz Martins, Patrick Girouard, Evan Elliott, Said Mekary
Martins, RS, Girouard, P, Elliott, E, and Mekary, S. Physiological responses of a jaw repositioning custom-made mouthguard on airway and their effects on athletic performance. J Strength Cond Res XX(X): 000-000, 2018-Advanced dental techniques such as jaw-repositioning have shown to increase lower body muscular power such as vertical jump, but its effects on acceleration and speed have not been studied. Similarly, jaw repositioning is commonly used to increase airways volume and ventilation in a special population (i...
June 20, 2018: Journal of Strength and Conditioning Research
Sheena C Ranade, Christian A Refakis, Aristides I Cruz, Kelly L Leddy, Lawrence Wells, John Todd Lawrence, Theodore J Ganley
BACKGROUND: Greater frequency and intensity level of sports participation may be contributing to an increasing incidence of anterior cruciate ligament (ACL) tears in skeletally immature athletes. Prior studies have assessed the functional outcomes of physeal-respecting ACL reconstruction in this patient population based on adult functional outcomes scoring systems; however, there is only sparse literature evaluating functional outcomes of this specific patient population. This study aimed to retrospectively evaluate a cohort of pediatric patients who had undergone all-epiphyseal ACL reconstruction (AEACLR) with a set of clinically validated, pediatric-specific patient-reported functional outcomes scores (PRFOS)...
June 20, 2018: Journal of Pediatric Orthopedics
Pedro E Alcaraz, Jorge Carlos-Vivas, Bruno O Oponjuru, Alejandro Martínez-Rodríguez
BACKGROUND: Sprinting is key in the development and final results of competitions in a range of sport disciplines, both individual (e.g., athletics) and team sports. Resisted sled training (RST) might provide an effective training method to improve sprinting, in both the acceleration and the maximum-velocity phases. However, substantial discrepancies exist in the literature regarding the influence of training status and sled load prescription in relation to the specific components of sprint performance to be developed and the phase of sprint...
June 20, 2018: Sports Medicine
Mai Tanabe-Ikegawa, Toshiyuki Takahashi, Hiroshi Churei, Akihiro Mitsuyama, Toshiaki Ueno
The present study was conducted to investigate the influence of rehydration with diluted sports drink and water gargling on salivary flow, pH and buffering capacity during exercise. Nineteen participants performed a 30-min bicycle ergometer exercise at 80% of maximal heart rate while consuming a sports drink, followed by gargling with water, or no gargling, immediately after the exercise (Exp. 1). The same experiment was then conducted on 9 participants who drank 1.5-fold diluted sports drink (Exp. 2-A) and 10 who drank 2-fold diluted sports drink (Exp...
2018: Journal of Oral Science
Erin Guty, Peter Arnett
OBJECTIVES: Research indicates that symptoms following a concussion are related to cognitive dysfunction; however, less is known about how different types of symptoms may be related to cognitive outcomes or how specific domains of cognition are affected. The present study explored the relationship between specific types of symptoms and these various cognitive outcomes following a concussion. METHODS: One-hundred twenty-two student-athletes with sports-related concussion were tested with a battery that included a symptom report measure and various cognitive tests...
June 21, 2018: Journal of the International Neuropsychological Society: JINS
Yosif Mansor, Itay Perets, Mary R Close, Brian H Mu, Benjamin G Domb
BACKGROUND: Femoroplasty performed for the treatment of cam-type femoroacetabular impingement (FAI) has become a common procedure. Underresection may result in residual FAI. Conversely, overresection may disrupt the labral seal, which is responsible for chondroprotective fluid dynamics of the hip. Hypothesis/Purpose: It was hypothesized that cam overresection negatively affects hip function. The purpose was to examine the effect of the accuracy of previous femoroplasty on hips presenting for revision hip arthroscopic surgery...
June 1, 2018: American Journal of Sports Medicine
Nasim Baradaran-Akbarzadeh, Mahin Tafazoli, Morteza Mojahedi, Seyed Reza Mazlom
INTRODUCTION: Sexual health is one of the key factors to sustain marital life and having a good sexual function. On the other hand, temperament affects sexual function. Training is also one of the basic foundations for promoting sexual health. Therefore, the researcher has designed and implemented a study (2017) aimed "determining the study of educational package on sexual function in cold temperament women of reproductive age." METHODS: This randomized clinical trial study was performed on 80 women in two groups (40 in each group)...
2018: Journal of Education and Health Promotion
Jose M Saavedra, Sveinn Þorgeirsson, Milan Chang, Hafrún Kristjánsdóttir, Antonio García-Hermoso
Sports performance analysis has been a growing field of study in the last decade. However, the number of studies in handball is small. The aims of this present study were (i) to compare handball game-related statistics by the match outcome (winning and losing teams) and (ii) to identify characteristics that discriminated performance in elite women's handball. The game-related statistics of the 236 matches played in the last four Olympic Games (Athens, Greece, 2004; Beijing, China, 2008; London, United Kingdom, 2012; and Rio de Janeiro, Brazil, 2016) were analysed...
June 2018: Journal of Human Kinetics
Jean Slawinski, Julien Louis, Julien Poli, Eve Tiollier, Charles Khazoom, Daniel Dinu
Fatigue modifies the kinematics of various sports-related movements. Basketball induces fatigue, however, the effects of fatigue on the kinematics of shooting have never been studied. This study analysed the effects of fatigue induced by repeated sprints on the kinematics of 3-point shooting (3PS) in young, elite basketball players (U18 level). 3D joint angles were calculated at the maximum and minimum heights of the centre of mass during 3PS, using inertial measurement units (Biomech system, Xsens Technologies BV, Enschede, The Netherlands)...
June 2018: Journal of Human Kinetics
Mojgan Amiri, Reza Ghiasvand, Mojtaba Kaviani, Scott C Forbes, Amin Salehi-Abargouei
BACKGROUND/OBJECTIVES: Chocolate milk (CM) contains carbohydrates, proteins, and fat, as well as water and electrolytes, which may be ideal for post-exercise recovery. We systematically reviewed the evidence regarding the efficacy of CM compared to either water or other "sport drinks" on post-exercise recovery markers. SUBJECTS/METHODS: PubMed, Scopus, and Google scholar were explored up to April 2017 for controlled trials investigating the effect of CM on markers of recovery in trained athletes...
June 19, 2018: European Journal of Clinical Nutrition
Pooya Hosseinzadeh, Clarabelle A DeVries, Ena Nielsen, Lindsay A Andras, Megan Mignemi, Jeffrey R Sawyer, John M Flynn, Stephen A Albanese
BACKGROUND: There has been an increase in the number of the graduates of pediatric orthopaedic fellowship programs over the past decade creating the potential for increased competition in the field. The purpose of this study was to analyze the effect of increased number of pediatric orthopaedic fellowship graduates on case volume as well as the type of procedures performed by recent graduates of pediatric orthopaedic fellowship programs from 2004 to 2014. METHODS: Case logs submitted for the American Board of Orthopaedic Surgery Part II examination by applicants with the self-declared subspecialty of pediatric orthopaedics from 2004 to 2014 were analyzed...
June 18, 2018: Journal of Pediatric Orthopedics
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