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https://www.readbyqxmd.com/read/28723822/biomechanical-differences-in-female-basketball-and-soccer-players-during-multi-directional-jump-landings
#1
Jeffrey B Taylor, Kevin R Ford, Randy J Schmitz, Scott E Ross, Terry A Ackerman, Sandra J Shultz
Anterior cruciate ligament injury prevention programs are less successful in basketball than soccer and may be due to distinct movement strategies that these athletes develop from sport-specific training. The purpose of this study was to identify biomechanical differences between female basketball and soccer players during multi-directional jump landings. Lower extremity biomechanics of eighty-nine female athletes who played competitive basketball (n=40) or soccer (n=49) at the middle- or high-school level were analyzed with three-dimensional motion analysis during a drop vertical jump (DVJ), double- (SAG-DL) and single-leg forward jump (SAG-SL), and double- (FRONT-DL) and single-leg (FRONT-SL) lateral jump...
July 14, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28723818/somatotype-and-body-composition-in-young-soccer-players-according-to-the-playing-position-and-sport-success
#2
Víctor Cárdenas-Fernández, José Luis Chinchilla-Minguet, Alfonso Castillo-Rodríguez
Soccer players undergo an evolution in their body composition throughout the growth and passage through the different base stages, that is, childhood, puberty and adolescence. The aim of this study was to analyze the morphology and body composition of U14, U16, and U19 soccer players, taking into account in addition, their sport success endorsed through the regularity participation and their relation with the different playing positions occupied during competition (goalkeeper, external defender, central defender, midfielder and forward/extreme)...
July 17, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28714759/effects-of-rigid-and-kinesio-taping-on-shoulder-rotation-motions-posterior-shoulder-tightness-and-posture-in-asymptomatic-overhead-athletes-a-randomized-controlled-trial
#3
Damla Gulpinar, Sibel Tekeli Ozer, Sevgi S Yesilyaprak
CONTEXT: Alterations in posture and motion patterns are thought to play a role in developing shoulder injuries in overhead athletes. Taping is widely used in the sporting population, but there are limited empirical data regarding its effectiveness. OBJECTIVES: To determine and compare the effects of rigid and kinesio taping on shoulder rotation motions, posterior shoulder tightness (PST) and posture in overhead athletes. DESIGN: Randomized controlled trial...
July 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28713457/personal-and-social-responsibility-among-athletes-the-role-of-self-determination-achievement-goals-and-engagement
#4
Paulo Martins, António Rosado, Vítor Ferreira, Rui Biscaia
The purpose of this study was to assess the relationship between motivation, engagement and personal and social responsibility among athletes. Based on the literature, a survey was conducted including measures of motivation, considering task orientation and ego orientation, intrinsic and extrinsic motivation, and amotivation. We also measured the components of engagement (dedication, confidence, vigor and enthusiasm) and the components of personal and social responsibility. A total of 517 athletes from different types of sports participated in the study...
June 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28713456/post-activation-potentiation-of-the-plantarflexors-implications-of-knee-angle-variations
#5
Paulo Gago, Anton Arndt, Maria M Ekblom
Flexing the knee to isolate the single joint soleus from the biarticular gastrocnemius is a strategy for investigating individual plantarflexor's post activation potentiation (PAP). We investigated the implications of testing plantarflexor PAP at different knee angles and provided indirect quantification of the contribution of gastrocnemius potentiation to the overall plantarflexor enhancements post conditioning. Plantarflexor supramaximal twitches were measured in ten male power athletes before and after a maximal isometric plantarflexion (MVIC) at both flexed and extended knee angles...
June 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28713431/an-unexpected-cause-of-bradycardia-in-a-patient-with-bacterial-meningitis
#6
Petros Ioannou, Magdalini Velegraki, Stella Soundoulounaki, Achilleas Gikas, Diamantis P Kofteridis
Sinus bradycardia which is a sinus rhythm with a resting heart rate of less than 60 bpm is caused by intrinsic cardiac disorders like sick sinus syndrome or inferior myocardial infarction, metabolic and environmental causes (such as hypothyroidism and electrolyte disorders), medications (such as beta-blockers and amiodarone), infection (such as myocarditis), increased intracranial pressure, and toxic exposure, while it can sometimes be a normal phenomenon, especially during sleep, in athletes, and during pregnancy...
2017: Case Reports in Medicine
https://www.readbyqxmd.com/read/28712544/the-effect-of-leg-dominance-and-landing-height-on-acl-loading-among-female-athletes
#7
Hossein Mokhtarzadeh, Katie Ewing, Ina Janssen, Chen-Hua Yeow, Nicholas Brown, Peter Vee Sin Lee
Female athletes are more prone to anterior cruciate ligament (ACL) injury. A neuromuscular imbalance called leg dominance may provide a biomechanical explanation. Therefore, the purpose of this study was to compare the side-to-side lower limb differences in movement patterns, muscle forces and ACL forces during a single-leg drop-landing task from two different heights. We hypothesized that there will be significant differences in lower limb movement patterns (kinematics), muscle forces and ACL loading between the dominant and non-dominant limbs...
July 5, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28711608/do-anabolic-androgenic-steroids-have-performance-enhancing-effects-in-female-athletes
#8
REVIEW
Grace Huang, Shehzad Basaria
Doping with anabolic androgenic steroids (AAS) is common among both male and female athletes and is a growing public health problem. Review of historical data of systematic state-sponsored doping programs implemented by the German Democratic Republic in elite female athletes and from the clinical trials of testosterone administration in non-athlete women suggests that AAS have ergogenic effects in women. The use of AAS in female athletes has been associated with adverse effects that include acne, hirsutism, deepening of the voice and menstrual disturbances; life-threatening adverse effects such as cardiac arrhythmias and sudden death have also been reported...
July 12, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28707644/going-the-extra-mile-lessons-learned-from-running-coaches-applied-to-medicine
#9
Ryan Graddy, Scott Wright
Master clinicians and successful long-distance runners have a lot in common. Both are dedicated to continuous improvement and are flexible in their approach, allowing for adaptation to meet unplanned challenges. Given these similarities and the important role of coaches in athletics, there is an opportunity for medical educators to learn from excellent running coaching. The authors spent time with three respected running coaches at different levels (high school, college, and postcollegiate online) and identified six principles employed by these coaches that seem to be particularly relevant for promoting skill development in medicine...
January 2017: Education for Health: Change in Training & Practice
https://www.readbyqxmd.com/read/28707498/epidemiology-of-injuries-in-men-s-lacrosse-implications-for-level-type-of-play-and-position
#10
Kim Barber Foss, Ed Le Cara, Teri McCambridge, Richard Hinton, Adam Kushner, Greg Myer
OBJECTIVE: The growth in participation in men's lacrosse has increased the likelihood of sport-specific injuries. Despite the exponential growth in men's lacrosse participation, there continues to be a need for specific epidemiological data concerning lacrosse injuries. The sport's rapid growth in participation could have a profound effect on injury prevalence characteristics. The purpose of this literature review is to aggregate available published data on injuries that occur in the sport of men's lacrosse at the youth, high school, collegiate, and professional levels...
July 14, 2017: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/28704312/trunk-muscle-activation-in-the-back-and-hack-squat-at-the-same-relative-loads
#11
David R Clark, Michael I Lambert, Angus M Hunter
The hack squat (HS) is likely to produce a greater 1 repetition maximum (1RM) compared to the back squat (BS). This can be attributed to the support of the trunk during the HS compared to no support during BS. This support however, may compromise trunk muscle activation (TMA), therefore producing different training adaptations. Accordingly, the purpose of this study was to compare 1RM in BS and HS and TMA at 4 relative loads, 65, 75, 85 and 95% of maximal system mass. Ten males completed 3 test sessions:1) BS and HS 1RM, 2) HS & BS neuromuscular test familiarization, and, 3) Neuromuscular test for 3 reps at 4 loads for BS and HS...
July 12, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28700513/sled-towing-acutely-decreases-acceleration-sprint-time
#12
Megan A Wong, Ian J Dobbs, Casey M Watkins, Saldiam R Barillas, A Lin, David C Archer, Robert G Lockie, Jared W Coburn, Lee E Brown
Sled towing is a common form of overload training in sports to develop muscular strength for sprinting. This type of training leads to acute and chronic outcomes. Acute training potentially leads to postactivation potentiation (PAP), which is when subsequent muscle performance is enhanced following a preload stimulus. The purpose of this study was to determine differences between rest intervals following sled towing on acute sprint speed. Twenty healthy recreationally trained males (age= 22.3 ± 2.4yrs, height= 176...
July 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28696986/fueling-the-triathlete-evidence-based-practical-advice-for-athletes-of-all-levels
#13
Andrew R Getzin, Cynthia Milner, Marie Harkins
Triathletes need to effectively fuel during training and racing to maximize their potential for success. While most research on fueling has focused on elite male triathletes, triathlon participation encompasses a broader demographic of racers ranging from those with aspirations of winning to those whose goals are completion. Carbohydrate is the primary macronutrient for fueling endurance activities. Athletes can usually tolerate 60 to 90 mg·h in the form of multiple different carbohydrate sources. Athletes should drink as thirst dictates and consider sodium replacement of sweat loss especially in individuals with a history of exercise-associated muscle cramps...
July 2017: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/28690042/the-impact-of-subchondral-bone-cysts-on-local-bone-stresses-in-the-medial-femoral-condyle-of-the-equine-stifle-joint
#14
Lance L Frazer, Elizabeth M Santschi, Kenneth J Fischer
Subchondral lucency (SCL), also referred to as subchondral bone cysts, can cause clinical problems in horses and humans. In humans, SCLs occur in youths and adolescents [1] due to mechanical factors (often related to athletics) and in skeletally mature individuals secondary to osteoarthritis (OA). In horses, SCL most commonly occurs in the medial femoral condyle (MFC) of growing horses (without OA), and causes lameness. The cause of equine SCL is debated, but bone trauma due to overload is the likely mechanism...
July 6, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28687478/factors-influencing-the-phenotypic-expression-of-hypertrophic-cardiomyopathy-in-genetic-carriers
#15
Inmaculada Pérez-Sánchez, Antonio José Romero-Puche, Esperanza García-Molina Sáez, María Sabater-Molina, José María López-Ayala, Carmen Muñoz-Esparza, David López-Cuenca, Gonzalo de la Morena, Francisco José Castro-García, Juan Ramón Gimeno-Blanes
INTRODUCTION AND OBJECTIVES: Hypertrophic cardiomyopathy (HCM) is a disorder with variable expression. It is mainly caused by mutations in sarcomeric genes but the phenotype could be modulated by other factors. The aim of this study was to determine whether factors such as sex, systemic hypertension, or physical activity are modifiers of disease severity and to establish their role in age-related penetrance of HCM. METHODS: We evaluated 272 individuals (mean age 49 ± 17 years, 57% males) from 72 families with causative mutations...
July 4, 2017: Revista Española de Cardiología
https://www.readbyqxmd.com/read/28685886/longitudinal-adaptations-of-bone-mass-geometry-and-metabolism-in-adolescent-male-athletes-the-pro-bone-study
#16
Dimitris Vlachopoulos, Alan R Barker, Esther Ubago-Guisado, Ioannis G Fatouros, Karen M Knapp, Craig A Williams, Luis Gracia-Marco
Adolescence is a crucial period for bone development and exercise can enhance bone acquisition during this period of life. However, it is not known how the different loading sports practised can affect bone acquisition in adolescent male athletes. Therefore, the purpose of the present study was to determine the 1 year longitudinal bone acquisition among adolescent males involved in osteogenic (football) and non-osteogenic sports (swimming and cycling) and compared to active controls. 116 adolescent males aged 12-14 years at baseline were monitored 1 year: 37 swimmers, 37 footballers, 29 cyclists and 14 active controls...
July 7, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28683782/a-descriptive-study-of-self-medication-practices-among-sri-lankan-national-level-athletes
#17
A D A Fernando, L M H Bandara, H M S T Bandara, S Pilapitiya, A de Silva
BACKGROUND: Intake of medicines and supplements is widespread among the professional athletes in developed countries and there are reports to suggest inappropriate self-administration of medicine. Data from South Asia on this area is lacking. This study examined self-medication practices with regard to use of allopathic and herbal/traditional medicines among national -level Sri Lankan athletes. RESULTS: 209 athletes from 15 national sport teams were assessed using an anonymous, interviewer administered questionnaire...
July 6, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28682655/enjoyment-and-behavioral-intention-predict-organized-youth-sport-participation-and-dropout
#18
Lauren A Gardner, Christopher A Magee, Stewart A Vella
BACKGROUND: Dropout from organized youth sport has significant adverse health implications. Enjoyment and behavioral intentions have consistently been linked with participation and dropout; however few studies have investigated these links using a prospective design. This study explored whether enjoyment and intentions to continue predicted dropout behavior at one-year follow-up. METHODS: Questionnaires were completed by 327 regular sports participants (Mage=13...
July 6, 2017: Journal of Physical Activity & Health
https://www.readbyqxmd.com/read/28680897/high-prevalence-of-nontraumatic-shoulder-pain-in-a-regional-sample-of-female-high-school-volleyball-athletes
#19
Kayt E Frisch, Jacob Clark, Chad Hanson, Chris Fagerness, Adam Conway, Lindsay Hoogendoorn
BACKGROUND: Shoulder pain is becoming increasingly problematic in young players as volleyball gains popularity. Associations between repetitive motion and pain and overuse injury have been observed in other overhand sports (most notably baseball). Studies of adult athletes suggest that there is a shoulder pain and overuse problem present in volleyball players, but minimal research has been done to establish rates and causes in juvenile participants. PURPOSE: To establish rates of shoulder pain, regardless of whether it resulted in a loss of playing time, in female high school volleyball players...
June 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28674604/mood-and-performance-anxiety-in-high-school-basketball-players-a-pilot-study
#20
Steffen J Hoover, Rachel K Winner, Holly McCutchan, Christina C Beaudoin, Lawrence W Judge, Lani M Jones, Brianna Leitzelar, Donald L Hoover
Participation in competitive sport may impact psychological measures, such as mood and performance anxiety, which in turn may impact enjoyment, adherence, continued participation, and so on. This study assessed the feasibility - in terms of process, resources, management, and potential scientific value- of measuring the effect of varying competitive challenges upon the mood and performance anxiety measures of high school athletes. The participants (n=12) consisted of the boys' varsity basketball team at a high school in a rural Midwestern community...
2017: International Journal of Exercise Science
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