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https://www.readbyqxmd.com/read/29351161/effects-of-contrast-strength-vs-plyometric-training-on-lower-limb-explosive-performance-ability-to-change-direction-and-neuromuscular-adaptation-in-soccer-players
#1
Mehrez Hammami, Nawel Gaamouri, Roy J Shephard, Mohamed Souhaiel Chelly
The aim was to compare the effects of two differing 8-week in-season strength training programs (contrast strength training [CST] vs. plyometric training [PT]) on selected performance tests (5 and 40m sprints, S 4 X 5 m change of direction test, squat (SJ) and countermovement (CMJ) jumps , leg peak power on a cycle ergometer force-velocity test, 1-repetition maximal (1-RM) half squat, and electromyographic [EMG] activity of the vastus lateralis, vastus medialis and rectus femoris muscles during vertical jump tests)...
January 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29349651/epidemiology-of-head-injuries-focusing-on-concussions-in-team-contact-sports-a-systematic-review
#2
REVIEW
Annika Prien, Alexander Grafe, Roland Rössler, Astrid Junge, Evert Verhagen
BACKGROUND: Although injuries to the head represent a small proportion of all sport injuries, they are of great concern due to their potential long-term consequences, which are even suspected in mild traumatic brain injuries. OBJECTIVE: The aim of this review was to compare the incidence of concussions and other head injuries in elite level football, rugby, ice hockey and American Football. METHODS: Four electronic databases (CINAHL, PsycINFO, Web of Science, PubMed) were searched...
January 18, 2018: Sports Medicine
https://www.readbyqxmd.com/read/29349255/gender-specific-associations-between-involvement-in-team-sport-culture-and-canadian-adolescents-substance-use-behavior
#3
Randy Boyes, Dylan E O'Sullivan, Brooke Linden, Michael McIsaac, William Pickett
Canadian adolescents have some of the highest rates of substance use in the world. The etiology of this phenomenon has not been fully explored, and one possible contextual determinant is involvement in sport activities that foster risk-taking behaviors through physical and social mechanisms. Using the 2013-14 Health Behaviour in School Aged Children (HBSC) study we therefore examined this hypothesis in a contemporary national sample of Canadian adolescents. The strength and direction of the relationship between sport and substance use varied by gender and substance, with team sport participation associated with increased binge drinking (RR 1...
December 2017: SSM—Population Health
https://www.readbyqxmd.com/read/29349094/upper-extremity-functional-status-of-female-youth-softball-pitchers-using-the-kerlan-jobe-orthopaedic-clinic-questionnaire
#4
Kaila A Holtz, Russell J O'Connor
Background: Softball is a popular sport with a high incidence of upper extremity injuries. The Kerlan-Jobe Orthopaedic Clinic (KJOC) questionnaire is a validated performance and functional assessment tool used in overhead athletes. Upper extremity pain patterns and baseline KJOC scores have not been reported for active female youth softball pitchers. Purpose/Hypothesis: The purpose of this study was to establish the prevalence of upper extremity pain and its effect in female youth softball pitchers over a competitive season...
January 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29349093/preseason-adductor-squeeze-strength-in-303-spanish-male-soccer-athletes-a-cross-sectional-study
#5
Ernest Esteve, Michael Skovdal Rathleff, Jordi Vicens-Bordas, Mikkel Bek Clausen, Per Hölmich, Lluís Sala, Kristian Thorborg
Background: Hip adductor muscle weakness and a history of groin injury both have been identified as strong risk factors for sustaining a new groin injury. Current groin pain and age have been associated with hip adductor strength. These factors could be related, but this has never been investigated. Purpose: To investigate whether soccer athletes with past-season groin pain and with different durations of past-season groin pain had lower preseason hip adductor squeeze strength compared with those without past-season groin pain...
January 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29347921/prospective-pre-and-post-race-evaluation-of-biochemical-electrophysiologic-and-echocardiographic-indices-in-30-racing-thoroughbred-horses-that-received-furosemide
#6
Catherine T Gunther-Harrington, Rick Arthur, Krista Estell, Beatriz Martinez Lopez, Alexandra Sinnott, Eric Ontiveros, Anita Varga, Joshua A Stern
BACKGROUND: Exercise induced cardiac fatigue (EICF) and cardiac dysrhythmias are well described conditions identified in high-level human athletes that increase in frequency with intensity and duration of exercise. Identification of these conditions requires an understanding of normal pre- and post-race cardiac assessment values. The objectives of this study were to (1) characterize selected indices of cardiac function, electrophysiologic parameters, and biochemical markers of heart dysfunction prior to and immediately after high level racing in Thoroughbred horses receiving furosemide; and (2) create pre- and post-race reference values in order to make recommendations on possible screening practices for this population in the future...
January 18, 2018: BMC Veterinary Research
https://www.readbyqxmd.com/read/29345519/-i-just-roll-over-pick-myself-up-and-carry-on-exploring-the-fall-risk-experience-of-canadian-masters-athletes
#7
Dylan Brennan, Aleksandra A Zecevic, Shannon L Sibbald, Volker Nolte
OBJECTIVES: The risk of falling increases in adults over the age of 65. A common barrier to take up physical activity in sedentary older adults is the fear of falls and injury. Experiences of masters athletes can provide insights into management of the risk for falling. The purpose of this phenomenological study was to explore the fall-risk experience of masters athletes actively competing in sport. METHODS: Masters athletes over the age of 55 (n=22) described their experiences in semi-structured interviews...
January 18, 2018: Journal of Aging and Physical Activity
https://www.readbyqxmd.com/read/29345161/caffeine-improves-triathlon-performance-a-field-study-in-males-and-females
#8
Sunita Potgieter, Hattie H Wright, Carine Smith
The ergogenic effect of caffeine on endurance exercise is commonly accepted. We aimed to elucidate realistically the effect of caffeine on triathlon event performance using a field study design, while allowing investigation into potential mechanisms at play. A double-blind, randomized, crossover, field trial was conducted. Twenty-six triathletes (14 males, 12 females) participated (age: 37.8±10.6 years, habitual caffeine intake: 413±505 mg/day, percentage body fat: 14.5±7.2%, training/week: 12.8±4.5 hours)...
January 18, 2018: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29341795/the-ability-to-provide-quality-chest-compressions-over-lacrosse-shoulder-pads
#9
Richard J Boergers, Thomas G Bowman, Monica Lininger
CONTEXT:   Performance of quality cardiopulmonary resuscitation is essential for improving patient outcomes. Performing compressions over football equipment inhibits compression depth and rate, but lacrosse equipment has not yet been studied. OBJECTIVE:   To assess the effect of lacrosse shoulder pads on the ability to provide quality chest compressions on simulation manikins. DESIGN:   Crossover study. SETTING:   Simulation laboratory...
January 17, 2018: Journal of Athletic Training
https://www.readbyqxmd.com/read/29340745/a-6-week-warm-up-injury-prevention-programme-results-in-minimal-biomechanical-changes-during-jump-landings-a-randomized-controlled-trial
#10
Jeffrey B Taylor, Kevin R Ford, Randy J Schmitz, Scott E Ross, Terry A Ackerman, Sandra J Shultz
PURPOSE: To examine the extent to which an ACL injury prevention programme modifies lower extremity biomechanics during single- and double-leg landing tasks in both the sagittal and frontal plane. It was hypothesized that the training programme would elicit improvements in lower extremity biomechanics, but that these improvements would be greater during a double-leg sagittal plane landing task than tasks performed on a single leg or in the frontal plane. METHODS: Ninety-seven competitive multi-directional sport athletes that competed at the middle- or high-school level were cluster randomized into intervention (n = 48, age = 15...
January 16, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29340004/performance-and-kinematic-differences-in-putting-between-healthy-and-disabled-elite-golfers
#11
Tomáš Gryc, Petr Stastny, František Zahálka, Wojciech Smółka, Piotr Żmijewski, Artur Gołaś, Marek Zawartka, Tomáš Malý
Golfers with disability are limited in the execution of the full golf swing, but their performance in putting may be comparable because this stroke does not demand significant strength, balance and range of motion. Therefore, the aim of this study was to compare putting performance, kinetic and kinematic consistency between golfers with different disabilities and healthy athletes. The participants consisted of three disabled athletes (perinatal cerebral palsy, multiple sclerosis, below knee lower limb amputee) and three healthy golfers (age 34 ± 4...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29340001/neuromuscular-control-during-the-bench-press-movement-in-an-elite-disabled-and-able-bodied-athlete
#12
Artur Gołaś, Anna Zwierzchowska, Adam Maszczyk, Michał Wilk, Petr Stastny, Adam Zając
The disabled population varies significantly in regard to physical fitness, what is conditioned by the damage to the locomotor system. Recently there has been an increased emphasis on the role of competitive sport in enhancing health and the quality of life of individuals with disability. One of the sport disciplines of Paralympics is the flat bench press. The bench press is one of the most popular resistance exercises used for the upper body in healthy individuals. It is used not only by powerlifters, but also by athletes in most strength-speed oriented sport disciplines...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29340000/sprinting-change-of-direction-ability-and-horizontal-jump-performance-in-youth-runners-according-to-gender
#13
Javier Yanci, Asier Los Arcos, Daniel Castillo, Jesús Cámara
The purpose of the study was to assess straight sprinting, change of direction ability and horizontal jump performance in youth runners according to age and gender. Two hundred and fifty-five youth runners (116 boys and 139 girls) participated in this study. The athletes were divided according to their age into five groups: under 8 yr (U8), under 10 yr (U10), under 12 yr (U12), under 14 yr (U14) and under 16 yr (U16). Significant differences (p < 0.01) were found between U8 and U10 in the 5 m sprint (d = 1...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339998/planning-training-loads-for-the-400-m-hurdles-in-three-month-mesocycles-using-artificial-neural-networks
#14
Krzysztof Przednowek, Janusz Iskra, Krzysztof Wiktorowicz, Tomasz Krzeszowski, Adam Maszczyk
This paper presents a novel approach to planning training loads in hurdling using artificial neural networks. The neural models performed the task of generating loads for athletes' training for the 400 meters hurdles. All the models were calculated based on the training data of 21 Polish National Team hurdlers, aged 22.25 ± 1.96, competing between 1989 and 2012. The analysis included 144 training plans that represented different stages in the annual training cycle. The main contribution of this paper is to develop neural models for planning training loads for the entire career of a typical hurdler...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339994/the-second-to-fourth-digit-ratio-in-elite-and-non-elite-greco-roman-wrestlers
#15
Mohammad Keshavarz, Mahdi Bayati, Babak Farzad, Amirbahador Dakhili, Hamid Agha-Alinejad
A low second-to-fourth digit ratio (2D:4D) has been reported to correlate with high performance and athletic potential of an individual in sport. It has been suggested that 2D:4D is a relatively weak predictor of strength and a stronger predictor of efficiency in aerobic exercise. Comparing extreme groups on a continuum of sports performance requiring high power (physical strength) output would be helpful to resolve this issue. Therefore, the purpose of the present study was to compare the 2D:4D ratio of world-class elite Greco-Roman wrestlers (n = 10) taking part in Olympic fitness camps in 2013 with the 2D:4D ratio of non-elite collegiate wrestlers (n = 20), and age-matched sedentary males (n = 40)...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339988/impact-of-futsal-and-swimming-participation-on-bone-health-in-young-athletes
#16
André Seabra, Ricardo J Fernandes, Elisa Marques, Miguel Moura, Esther Ubago-Guisado, Enrique Hernando, Leonor Gallardo
Physical activity plays a crucial role in bone mass acquisition during childhood and adolescence, with weightbearing and high-impact sport activities being more beneficial. This study sought to evaluate the impact of different sports activities on bone mineral density and content in male Portuguese athletes. Seventy adolescent boys (aged 12-15 years) including 28 futsal players (FG), 20 swimmers (SG) and 22 non-athletic adolescents used as control subjects (CG), participated in the current study. Areal bone mineral density (aBMD) and areal bone mineral content (aBMC) were measured by dual energy x-ray absorptiometry (DEXA)...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29339986/seeking-optimal-nutrition-for-healthy-body-mass-reduction-among-former-athletes
#17
Dominika Maciejewska, Małgorzata Michalczyk, Maja Czerwińska-Rogowska, Marcin Banaszczak, Karina Ryterska, Karolina Jakubczyk, Jakub Piotrwski, Joanna Hołowko, Arleta Drozd, Paweł Wysokińki, Krzysztof Ficek, Krzysztof Wilk, Anna Lubkowska, Paweł Cięszczyk, Jerzy Bertrand, Ewa Stachowska
The aim of the study was to investigate the efficacy of 6 week Mediterranean diet or 30% calorie restriction on the fatty acid profile and eicosanoids (hydroxyoctadecadienoi acids and hydroxyeicosatetraenoic acids) concentration. Furthermore, basic biochemical variables such as insulin, glucose, HOMA-IR, and a lipid profile were estimated. The study enrolled 94 Caucasian former athletes aged 20-42, with body height of 179 ± 16.00 cm and body mass of 89.26 ± 13.25 kg who had not been active for at least 5 years...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29338015/exercise-induced-circulating-microrna-changes-in-athletes-in-various-training-scenarios
#18
Martin Horak, Filip Zlamal, Robert Iliev, Jan Kucera, Jan Cacek, Lenka Svobodova, Zuzana Hlavonova, Tomas Kalina, Ondrej Slaby, Julie Bienertova-Vasku
BACKGROUND: The aim of the study was to compare selected extracellular miRNA levels (miR-16, miR-21, miR-93 and miR-222 with the response to 8-week-long explosive strength training (EXPL), hypertrophic strength training (HYP) and high-intensity interval training (HIIT). METHODS: 30 young male athletes of white European origin (mean age: 22.5 ± 4.06 years) recruited at the Faculty of Sports Studies of Masaryk University were enrolled in this study. The study participants were randomly assigned to three possible training scenarios: EXPL, HYP or HITT and participated in 8-week-long program in given arm...
2018: PloS One
https://www.readbyqxmd.com/read/29337721/continuing-play-symptom-severity-and-symptom-duration-after-concussion-in-youth-athletes
#19
David R Howell, Michael J OʼBrien, Joana Fraser, William P Meehan
OBJECTIVE: To determine whether continuing to play after a concussion is associated with higher symptom burden or prolonged symptom duration. DESIGN: Patients who presented for care at a sport concussion clinic within the first 3 weeks of injury were asked whether they continued to play immediately after their injury. SETTING: Sport concussion clinic within a regional tertiary care hospital. MAIN OUTCOME MEASURES: Clinical outcomes including symptom severity, symptom duration, age, time from injury-clinical presentation, sex, sport type, previous concussion history, and whether or not they experienced loss of consciousness or amnesia at the time of injury were recorded...
January 15, 2018: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/29337649/neurocognitive-deficits-associated-with-adhd-in-athletes-a-systematic-review
#20
Poyrung Poysophon, Ashwin L Rao
CONTEXT: Attention deficit hyperactivity disorder (ADHD) is a common childhood disorder and is frequently diagnosed in young adults. Emerging studies suggest a relationship between ADHD and concussion. OBJECTIVE: To determine whether athletes with ADHD are at increased risk for neurocognitive deficits related to concussion risk, symptom reporting, and recovery. DATA SOURCES: A comprehensive search of PubMed, CINAHL, PsychInfo, and Cochrane Library databases was performed...
January 1, 2018: Sports Health
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