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https://www.readbyqxmd.com/read/29352373/sleep-interventions-designed-to-improve-athletic-performance-and-recovery-a-systematic-review-of-current-approaches
#1
REVIEW
Daniel Bonnar, Kate Bartel, Naomi Kakoschke, Christin Lang
BACKGROUND: Athletes experience various situations and conditions that can interfere with their sleep, which is crucial for optimal psychological and physiological recovery as well as subsequent performance. Conventional sleep screening and intervention approaches may not be efficacious for athletes given their lifestyle, the demands of training and travel associated with interstate/international competition. OBJECTIVES: The present systematic review aimed to summarize and evaluate sleep intervention studies targeting subsequent performance and recovery in competitive athletes...
January 20, 2018: Sports Medicine
https://www.readbyqxmd.com/read/29352279/girls-in-the-boat-sex-differences-in-rowing-performance-and-participation
#2
Kevin G Keenan, Jonathon W Senefeld, Sandra K Hunter
Men outperform women in many athletic endeavors due to physiological and anatomical differences (e.g. larger and faster muscle); however, the observed sex differences in elite athletic performance are typically larger than expected, and may reflect sex-related differences in opportunity or incentives. As collegiate rowing in the United States has been largely incentivized for women over the last 20 years, but not men, the purpose of this study was to examine sex differences in elite rowing performance over that timeframe...
2018: PloS One
https://www.readbyqxmd.com/read/29351950/use-of-event-specific-tertiles-to-analyse-the-relationship-between-serum-androgens-and-athletic-performance-in-women
#3
Amanda Menier
No abstract text is available yet for this article.
January 19, 2018: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/29351382/team-versus-individual-sport-participation-as-a-modifying-factor-in-the-development-of-post-concussion-syndrome-after-first-concussion-a-pilot-study
#4
Aaron S Jeckell, Benjamin L Brett, Douglas J Totten, Gary S Solomon
Identification of modifying factors that influence the development of post-concussion syndrome (PCS) following sport-related concussion (SRC) has drawn considerable interest. In this pilot study, we investigate the effect of team vs. individual sport participation on the development of PCS in a sample of 136 high school and college student-athletes. Controlling for several confounding variables, we employed a binary logistic regression and chi-squared test. Results of this pilot study indicate that participation in team versus individual sport is not a significant factor in the development of PCS...
January 19, 2018: Applied Neuropsychology. Child
https://www.readbyqxmd.com/read/29351167/can-caffeine-intake-improve-neuromuscular-and-technical-tactical-performance-during-judo-matches
#5
Marina Saldanha da Silva Athayde, Rafael Lima Kons, Daniele Detanico
This study aimed to verify the effect of caffeine intake on blood lactate concentrations and neuromuscular and technical-tactical performance during simulated judo matches. Fourteen male judo athletes received capsules containing caffeine or placebo and were evaluated in both conditions. Before the baseline and 1 hour after the caffeine/placebo intake, athletes performed the countermovement jump test (CMJ), handgrip strength, judogi grip strength test (JGST), and blood samples were collected. Subsequently, the athletes were submitted to three 5 minute matches with 15 minute intervals...
January 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29351164/body-mass-index-versus-body-fat-percentage-in-prospective-nfl-athletes-overestimation-of-obesity-rate-in-athletes-at-the-nfl-scouting-combine
#6
Capt Matthew T Provencher, Jorge Chahla, George Sanchez, Mark E Cinque, Nicholas I Kennedy, Jim Whalen, Mark D Price, Gilbert Moatshe, Robert F LaPrade
Obesity has been previously noted as a major issue in the National Football League (NFL), where it has been shown that 97% of all players demonstrate a body mass index (BMI) of ≥25.0 with a reported obesity rate of 56% (BMI ≥30.0). However, BMI does not take into account body composition by mass, and may overestimate prevalence of obesity. The purposes of this study were to (1) determine the validity of BMI as a measure of body fat percentage and obesity in athletes at the NFL Combine, to define the obesity rate based on body fat percentage compared to BMI...
January 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29351162/potentiation-effects-of-the-french-contrast-method-on-the-vertical-jumping-ability
#7
Joseba Andoni Hernández-Preciado, Eneko Baz, Carlos Balsalobre-Fernández, David Marchante, Jordan Santos-Concejero
This study examined the acute effects of the potentiation protocol known as French Contrast Method on the vertical jumping ability measured by a countermovement jump (CMJ). 31 athletes participated in the study (intervention group n=17 and control group n=14). The CMJ height was measured using the IOS application MyJump App 2.0 pre- and post- the French Contrast protocol, which consisted of 3 sets of isometric partial squats, drop jumps, dynamic half-squats and hurdle jumps. The CMJ height improved from its baseline values by 5...
January 17, 2018: Journal of Strength and Conditioning Research
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
#8
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/29351158/physical-performance-measures-of-flexibility-hip-strength-lower-limb-power-and-trunk-endurance-in-healthy-navy-cadets-normative-data-and-differences-between-sex-and-limb-dominance
#9
Thiago Jambo Alves Lopes, Milena Simic, Daniel de Souza Alves, Priscila Dos Santos Bunn, Allan Inoue Rodrigues, Bruno de Souza Terra, Maicom da Silva Lima, Fabrício Miranda Ribeiro, Patrick Vilão, Evangelos Pappas
The objectives were to provide normative data on commonly used physical performance tests that may be associated with musculoskeletal injuries in Navy cadets, and assess for sex and limb dominance differences. A large cohort of Navy cadets were assessed for physical performance tests of flexibility (ankle dorsiflexion range of motion and sit and reach), isometric hip strength, lower limb power (single leg hop), and trunk endurance (plank and side plank tests). Besides providing normative data tables, sex and limb dominance differences were assessed by a two-way mixed ANOVA...
January 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29350556/rehabilitation-of-a-young-athlete-with-extension-based-low-back-pain-addressing-motor-control-impairments-and-central-sensitization
#10
John J Winslow, Mark Jackson, Andrew Getzin, Michael Costello
OBJECTIVE:   To describe the conservative management of a young athlete with extension-based (EB) low back pain (LBP). BACKGROUND:   We present the case of a 15-year-old female high school gymnast with a 4-year history of EB LBP. Magnetic resonance imaging revealed a healed spondylolysis and significant lumbar multifidi muscle (LMM) atrophy with fatty infiltrate. She had several courses of outpatient orthopaedic rehabilitation that focused on core muscle strengthening (improving activation and strength of the LMM and transversus abdominus muscle in a neutral pelvic position) without long-lasting improvement...
January 19, 2018: Journal of Athletic Training
https://www.readbyqxmd.com/read/29350553/role-strain-part-1-experiences-of-athletic-trainers-employed-in-the-professional-sports-setting
#11
Manual G Romero, William A Pitney, Kirk Brumels, Stephanie M Mazerolle
CONTEXT:   The demands and expectations of athletic trainers employed in professional sports settings (ATPSSs) have increased over the years. Meeting these demands and expectations may predispose the athletic trainer to workplace stress and ultimately role strain. OBJECTIVE:   To investigate the concept of role strain among ATPSSs. DESIGN:   Sequential, explanatory mixed-methods study consisting of 2 phases: (1) population role-strain survey and (2) personal interviews...
January 19, 2018: Journal of Athletic Training
https://www.readbyqxmd.com/read/29350552/role-strain-part-2-perceptions-among-athletic-trainers-employed-in-the-professional-practice-setting
#12
Manual G Romero, William A Pitney, Stephanie M Mazerolle, Kirk Brumels
CONTEXT:   Athletic trainers (ATs) employed in the professional sports setting (ATPSSs) demonstrate moderate to high degrees of role strain. The experiences and perceptions of these ATs provide insight regarding the sources of role strain as well as ways to reduce it. OBJECTIVE:   To investigate the perceptions of ATPSSs regarding role strain. DESIGN:   Qualitative study. PATIENTS OR OTHER PARTICIPANTS:   From a purposeful sampling of 389 ATs employed in the 5 major sport leagues (Major League Baseball, Major League Soccer, National Basketball Association, National Football League, and National Hockey League), we identified 34 participants willing to participate in a phone interview...
January 19, 2018: Journal of Athletic Training
https://www.readbyqxmd.com/read/29350429/sprint-performance-and-propulsion-asymmetries-on-an-ergometer-in-trained-high-and-low-point-wheelchair-rugby-players
#13
Victoria L Goosey-Tolfrey, Riemer J K Vegter, Barry S Mason, Thomas A W Paulson, John P Lenton, Jan W van der Scheer, Lucas H V van der Woude
The purpose of this study was to examine the propulsion asymmetries of wheelchair athletes whilst sprinting on an instrumented, dual-roller ergometer system. Eighteen experienced wheelchair rugby players (8 low-point (LP) (class ≤1.5) and 10 high-point (HP) (class ≥2.0)) performed a 15s sprint in their sports wheelchair on the instrumented ergometer. Asymmetry was defined as the difference in distance and power output (PO) between left and right sides when the best side reached 28m. Propulsion techniques were quantified based on torque and velocity data...
January 19, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29349906/pregnancy-greatly-affect-the-steroidal-module-of-the-athlete-biological-passport
#14
Jenny Mullen, Yifat Gadot, Emma Eklund, Alexander Andersson, Jenny J Schulze, Magnus Ericsson, Angelica Lindén Hirschberg, Anders Rane, Lena Ekström
Concentrations of urinary steroids are measured in anti-doping test programs to detect doping with endogenous steroids. These concentrations are combined into ratios and followed over time in the steroidal module of the Athlete Biological Passport (ABP). The most important ratio in the ABP is the testosterone/epitestosterone (T/E) ratio but this ratio is subject to intra-individual variations, especially large in women, which complicates interpretation. In addition there are other factors affecting T/E, pregnancy for example is known to affect the urinary excretion rate of epitestosterone and hence the T/E ratio...
January 18, 2018: Drug Testing and Analysis
https://www.readbyqxmd.com/read/29349651/epidemiology-of-head-injuries-focusing-on-concussions-in-team-contact-sports-a-systematic-review
#15
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
#16
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
#17
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
#18
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/29349018/open-4-compartment-fasciotomy-for-chronic-exertional-compartment-syndrome-of-the-leg
#19
Amos Z Dai, Michael Zacchilli, Neha Jejurikar, Hien Pham, Laith Jazrawi
Chronic exertional compartment syndrome (CECS) is a significant source of lower extremity pain and morbidity in the athletic population. Although endoscopic techniques have been introduced, open fasciotomy remains the mainstay of surgical treatment because of the paucity of evidence in support of an endoscopic approach. The literature on surgical management of CECS is mixed, and overall success rates are modest at best. Optimizing surgical technique, including prevention of neurovascular injury and wound complications, can make a significant impact on the clinical outcome...
December 2017: Arthroscopy Techniques
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
#20
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
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