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https://www.readbyqxmd.com/read/28745469/reliability-of-bounce-drop-jump-parameters-within-elite-male-rugby-players
#1
Lisa Costley, Eric Wallace, Michael Johnston, Rodney Kennedy
BACKGROUND: The aims of the study were to investigate the number of familiarisation sessions required to establish reliability of the bounce drop jump (BDJ) and subsequent reliability once familiarisation is achieved. METHOD: Seventeen trained male athletes completed 4 BDJs in 4 separate testing sessions. Force-time data from a 20 cm BDJ was obtained using two force plates (ensuring ground contact < 250 ms). Subjects were instructed to 'jump for maximal height and minimal contact time' while the best and average of four jumps were compared...
July 25, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28745464/elite-athletes-and-pubertal-delay
#2
Karina Kapczuk
Intensive physical training and participation in competitive sports during childhood and early adolescence may affect athletes' pubertal development. On the other hand, pubertal timing, early or late, may impact on an athlete selection for a particular sport. Genetic predisposition, training load, nutritional status and psychological stress determine athletes' pubertal timing. Athletes that practice esthetic sports, especially gymnasts, are predisposed to a delay in pubertal development. The growing evidence indicates that energy deficiency, not a systemic training per se, plays a crucial role in the pathogenesis of functional hypothalamic hypogonadism in female athletes...
October 2017: Minerva Pediatrica
https://www.readbyqxmd.com/read/28743205/do-baseball-pitchers-improve-mechanics-after-biomechanical-evaluations
#3
Glenn S Fleisig, Alek Z Diffendaffer, Brett Ivey, Kyle T Aune
The purpose of this study was to determine how often flaws in pitching mechanics identified from biomechanical analysis are corrected. The biomechanics of 46 baseball pitchers were evaluated twice, with an average of 12 months (range 2-48 months) between evaluations. Pitchers were healthy at the time of both evaluations, competing at the high school, college, minor league or Major League level. After warming up, each participant pitched 10 full-effort fastballs. Automated three-dimensional motion analysis was used to compute eight kinematic parameters which were compared with a database of elite professional pitchers...
July 25, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28739612/benign-paroxysmal-positional-vertigo-bppv-diagnosis-and-treatment-in-an-elite-professional-football-soccer-player
#4
Lisa Burrows, Rob Price
A 33-year-old male professional football player suffered from acute-onset dizziness following a lower limb soft tissue treatment in prone lying. Symptoms included spinning vertigo lasting for 30's, headache, visual vertigo and disorientation. Clinical examination of balance and vestibular systems confirmed a left posterior canalithiasis benign paroxysmal positional vertigo (BPPV) and excluded other central and peripheral causes of dizziness. Two cycles of a left Epley manoeuvre were performed. An Epley manoeuvre abolished the BPPV and negated the need for medication...
July 24, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28738856/acute-changes-in-blood-lipid-profiles-and-metabolic-risk-factors-in-collegiate-elite-taekwondo-athletes-after-short-term-de-training-a-prospective-insight-for-athletic-health-management
#5
Yu-Chi Sung, Yi-Hung Liao, Chung-Yu Chen, Yu-Liang Chen, Chun-Chung Chou
BACKGROUND: This study used a short-term de-training model to mimic the physiological weight changes during the early retirement stage in Taekwondo (TKD) athletes. This study investigates whether the negative changes in body composition, blood lipid profiles, and metabolic biomarkers occur in elite collegiate TKD athletes when experiencing a two-months de-training period. METHODS: Fourteen collegiate Division Ι elite TKD athletes (age: 21.1 ± 0.2 years, BMI: 22...
July 24, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28738670/antidoping-program-an-important-factor-in-the-promotion-and-protection-of-the-integrity-of-sport-and-athlete-s-health
#6
Filomena Mazzeo, Vincenzo Monda, Stefania Santamaria, Ersilia Nigro, Anna Valenzano, Ines Villano, Giuseppe Cibelli, Antonietta Messina, Giovanni Messina
Use of performance-enhancing drugs concern not only elite Olympic and Paralympic Games' athletes but also amateur athletes, who are making increasing use of substances and/or methods. Furthermore, a new frontier reached by the doping is the use of genes. World Anti- Doping Agency (WADA), expressly prohibited the participation in competitive sports by the athlete in case of taking banned substances to treat disease in the event that the above assumption implies an excessive improvement of performance. This study aims to analyze and show the doping control as an essential part of the anti-doping program to promote and protect the integrity of sport and athlete's health...
July 24, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28736489/challenges-to-promoting-health-for-amateur-athletes-through-anti-doping-policy
#7
April Henning
Anti-doping regulations are intended, at least in part, to promote the health of athletes. While most anti-doping efforts target elite and professional competitors, there have been recent moves by sport governing bodies to expand anti-doping testing to include amateur athletes. Drawing on previous critiques of anti-doping policies and illustrating cases, this article outlines five of the challenges to health promotion of applying the current detect and ban model to the amateur level of sport. I argue that the current approach is not effective and, in some ways, may undermine the goal of health promotion at the amateur level...
2017: Drugs: Education, Prevention, and Policy
https://www.readbyqxmd.com/read/28730946/contribution-of-upper-limb-muscles-to-two-different-gripping-styles-in-elite-indoor-tug-of-war-athletes
#8
Wen-Tzu Tang, Wei-Chih Liao, Hsin-Min Lee
To investigate characteristic upper limb muscle use between two common tug of war (TOW) gripping styles, 20 elite athletes from two high school TOW teams were recruited. Under conditioned attack pulling (with 90% maximal force) on a tug machine, participants used their own habitual gripping style to pull for five 15-s trials. Force and kinematic measurements showed a significantly better force performance and higher centre-of-gravity tilting angle with the gripping style one than with the gripping style two (GS2) (both p < 0...
July 21, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28726737/respiratory-tract-infections-and-the-role-of-biologically-active-polysaccharides-in-their-management-and-prevention
#9
REVIEW
Milos Jesenak, Ingrid Urbancikova, Peter Banovcin
Respiratory tract infections (RTIs) are the most common form of infections in every age category. Recurrent respiratory tract infections (RRTIs), a specific form of RTIs, represent a typical and common problem associated with early childhood, causing high indirect and direct costs on the healthcare system. They are usually the consequence of immature immunity in children and high exposure to various respiratory pathogens. Their rational management should aim at excluding other severe chronic diseases associated with increased morbidity (e...
July 20, 2017: Nutrients
https://www.readbyqxmd.com/read/28723843/no-superior-adaptations-to-carbohydrate-periodization-in-elite-endurance-athletes
#10
Kasper Degn Gejl, Line Thams, Mette Hansen, Torben Rokkedal-Lausch, Peter Plomgaard, Lars Nybo, Filip J Larsen, Daniele A Cardinale, Kurt Jensen, Hans-Christer Holmberg, Kristian Vissing, Niels Ørtenblad
PURPOSE: The present study investigated the effects of periodic CHO restriction on endurance performance and metabolic markers in elite endurance athletes. METHODS: Twenty-six male elite endurance athletes (VO2max: 65.0 ml O2[BULLET OPERATOR]kg[BULLET OPERATOR]min) completed 4 weeks of regular endurance training, while matched and randomized into two groups training with (Low) or without (High) carbohydrate (CHO) manipulation three days a week. The CHO manipulation days consisted of a 1-hr high intensity bike session in the morning, recovery for 7 hrs while consuming isocaloric diets containing either high CHO (414±2...
July 19, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28723842/reduced-neuromuscular-performance-in-amenorrheic-elite-endurance-athletes
#11
Åsa B Tornberg, Anna Melin, Fiona Manderson Koivula, Anders Johansson, Sven Skouby, Jens Faber, Anders Sjödin
INTRODUCTION: Secondary functional hypothalamic amenorrhea (SFHA) is common among female athletes, especially in weight-sensitive sports. The aim of this study was to investigate the link between SFHA and neuromuscular performance in elite endurance athletes. METHODS: Sixteen eumenorrheic (EUM) and 14 SFHA athletes from national teams and competitive clubs participated. Methods included gynecological examination; body composition (DXA);; resting metabolic rate and work efficiency; exercise capacity; knee muscular strength (KMS) and knee muscular endurance (KME); reaction time (RT); blood sampling performed on the 3rd-5th day of the menstrual cycle, and 7-day assessment of energy availability...
July 19, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28717618/plantar-fasciitis-in-athletes-diagnostic-and-treatment-strategies-a-systematic-review
#12
REVIEW
Federica Petraglia, Ileana Ramazzina, Cosimo Costantino
BACKGROUND: Plantar fasciitis (PF) is reported in different sports mainly in running and soccer athletes. Purpose of this study is to conduct a systematic review of published literature concerning the diagnosis and treatment of PF in both recreational and élite athletes. The review was conducted and reported in accordance with the PRISMA statement. METHODS: The following electronic databases were searched: PubMed, Cochrane Library and Scopus. As far as PF diagnosis, we investigated the electronic databases from January 2006 to June 2016, whereas in considering treatments all data in literature were investigated...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28717612/intratendinous-tears-of-the-achilles-tendon-a-new-pathology-analysis-of-a-large-4-year-cohort
#13
Otto Chan, Sarah Morton, Mel Pritchard, Tina Parkes, Peter Malliaras, Tom Crisp, Nat Padhiar, Nicola Maffulli, John King, Dylan Morrissey
BACKGROUND: Achillodynia is common and includes Achilles tendinopathy, partial Achilles tears and Achilles tendon ruptures. However, we believe an additional pathology should be considered for Achillodynia differentials - the intratendinous tear (ITT). METHODS: Examinations of 740 achillodynic patients in one specialist centre were reviewed. ITTs were defined as a clearly visualised echopoor area situated centrally and extending to, but not through the tendon periphery, with pain on palpation and no clinical findings consistent with Achilles rupture...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28714760/houston-we-still-have-a-problem
#14
Martin Buchheit
Apollo 13 was initially looking like it would be the smoothest flight ever. After the explosion of an oxygen tank however, the astronauts were close to spending the rest of their lives in rotation around the planet. I wished to use this well-known incident to discuss further the link, or lack thereof, between sport sciences research and current field practices. There is a feeling that the academic culture and its publishing requirements have created a bit of an Apollo 13-like orbiting world (e.g., journals and conferences) that is mostly disconnected from the reality of elite performance...
July 17, 2017: International Journal of Sports Physiology and Performance
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
#15
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/28713473/home-advantage-in-judo-analysis-by-the-combat-phase-penalties-and-the-type-of-attack
#16
Ciro José Brito, Bianca Miarka, Alfonso López Díaz de Durana, David H Fukuda
Previous studies indicate positive home advantage in judo; however, the factors that influence home advantage have yet to be fully explored. This study investigated the potential differences in technical-tactical variables between home and visiting athletes. A total of 1411 video recorded matches were analyzed (123 home, 1288 away) from 36 international judo competitions contested in 2011-12. The matches were analyzed by the following criteria: combat phases (approach, gripping, attack, defense, groundwork and pause), penalties (by the athlete or the opponent) and the types of attacks (with or without a score)...
June 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28713458/trunk-strength-characteristics-of-elite-alpine-skiers-a-comparison-with-physically-active-controls
#17
Carolin Hildebrandt, Lisa Müller, Christian Heisse, Christian Raschner
Core muscle imbalances and weak trunk strength are relevant for injury prevention and performance. Information regarding core strength requirements and ideal flexion/extension ratios in alpine skiing is limited. We aimed to compare trunk strength capacities in elite alpine skiers with those of a matched control group. The concentric maximal trunk flexion and extension of 109 elite skiers and 47 active controls were measured at 150°/s in a ballistic mode using the CON-TREX® TP 1000 test system. The relative flexion peak torque was higher in male ski racers (p = 0...
June 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28711608/do-anabolic-androgenic-steroids-have-performance-enhancing-effects-in-female-athletes
#18
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 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/28708708/atopy-in-elite-endurance-athletes
#19
Renata N Teixeira, Gerson Dos Santos Leite, Matteo Bonini, Renata Gorjão, Rosana C Agondi, Cristina M Kokron, Celso R F Carvalho
OBJECTIVE: To assess the frequency of atopy (specific IgE levels), to evaluate the allergic symptoms using the Allergy Questionnaire for Athletes (AQUA), and to determine whether atopy is associated with allergic symptoms in elite endurance athletes. DESIGN: Cross-sectional study. SETTING: Assessments were performed at Hospital das Clinicas-São Paulo University Medical School. PARTICIPANTS: Fifty-nine elite endurance athletes (triathletes and runners)...
July 11, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28704344/effects-of-altering-trunk-position-during-landings-on-patellar-tendon-force-and-pain
#20
Rodrigo Scattone Silva, Craig R Purdam, Angela M Fearon, Wayne A Spratford, Claire Kenneally-Dabrowski, Peter Preston, Fábio V Serrão, James E Gaida
PURPOSE: To verify the immediate effects of altering sagittal plane trunk position during jump-landings on lower limb biomechanics, patellar tendon force and pain of athletes with and without patellar tendinopathy. METHODS: Twenty-one elite male athletes were categorized into 3 groups, athletes with patellar tendinopathy (TG, n=7), asymptomatic athletes with patellar tendon abnormalities (AG, n=7) and asymptomatic athletes without tendon abnormalities (CG, n=7)...
July 12, 2017: Medicine and Science in Sports and Exercise
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