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https://www.readbyqxmd.com/read/29035985/qt-corrections-for-long-qt-risk-assessment-implications-for-the-preparticipation-examination
#1
David Hadley, David Hsu, David Pickham, Jonathan A Drezner, Victor F Froelicher
BACKGROUND: Because sudden cardiac death (SCD) in the young mainly occur in individuals with structurally normal hearts, improved screening techniques for detecting inherited arrhythmic diseases are needed. The QT interval is an important screening measurement; however, the criteria for detecting an abnormal QT interval are based on Bazett formula and older populations. OBJECTIVE: To define the normal upper limits for QT interval from the electrocardiograms (ECGs) of healthy young individuals, compare the major correction formula and propose new QT interval thresholds for detecting those at risk of SCD...
October 10, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/29035595/the-influence-of-physical-qualities-on-activity-profiles-of-female-australian-football-match-play
#2
Georgia M Black, Tim J Gabbett, Rich D Johnston, Michael H Cole, Geraldine Naughton, Brian Dawson
PURPOSE: The rapid transition of female Australian football players from amateur to semi-elite competitions has the potential for athletes to be underprepared for match-play. To gain an understanding the match demands of female football, the aims of this study were three-fold: (1) to highlight the physical qualities that discriminate selected and non-selected female Australian Football players, (2) to investigate activity profiles of female Australian Football players, and (3) to gain an understanding of the influence of physical qualities on running performance in female Australian Football match-play...
October 16, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29035592/returners-exhibit-greater-jumping-performance-improvements-during-a-peaking-phase-compared-to-new-players-on-a-volleyball-team
#3
Caleb D Bazyler, Satoshi Mizuguchi, Ashley A Kavanaugh, John J McMahon, Paul Comfort, Michael H Stone
PURPOSE: To determine if jumping performance changes during a peaking phase differed between returners and new players in a female collegiate volleyball team and to determine which variables best explained the variation in performance changes. METHODS: Fourteen volleyball players were divided into two groups: returners (n=7) and new players (n=7) who completed a 5-week peaking phase prior to conference championships. Players were tested at baseline prior to the pre-season on measures of vastus lateralis cross-sectional area using ultrasonography, estimated back squat one repetition maximum (1-RM), and countermovement jump height (JH) and relative peak power (PPa) on a force platform...
October 16, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29035582/video-feedback-and-2-dimensional-landing-kinematics-in-elite-female-handball-players
#4
Anne Benjaminse, Wytze Postma, Ina Janssen, Egbert Otten
CONTEXT: In team handball, an anterior cruciate ligament injury often occurs during landing after a jump shot. Many intervention programs try to reduce the injury rate by instructing athletes to land more safely. Video is an effective way to provide feedback, but little is known about its influence on landing technique in sport-specific situations. OBJECTIVE: To test the effectiveness of a video-overlay feedback method on landing technique in elite handball players...
October 16, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/29032309/anterior-cruciate-ligament-revision-with-achilles-tendon-allograft-in-young-athletes
#5
S Zaffagnini, A Grassi, G M Marcheggiani Muccioli, T R Di Sarsina, L Macchiarola, M Mosca, M P Neri, M Marcacci
BACKGROUND: Return to sport after revision ACL reconstruction is a controversial topic, several studies reported the results of different techniques and graft in sportsman, presenting an incredibly wide range of return to the same pre-injury activity level, from 0% to 100%. The purpose of this study was to evaluate the clinical outcomes and return to sport rate in young athletes after non anatomic double-bundle revision ACL reconstruction with Achilles allograft. HYPOTHESIS: the present revision technique was effective in terms of stability, return to sport and functional outcomes MATERIAL AND METHODS: All the athletes undergone Revision ACL reconstruction with non-irradiated Achilles tendon allograft with a non-anatomical double-bundle technique were included in the study...
October 12, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/29031642/the-effect-of-oral-contraceptive-use-on-salivary-testosterone-concentrations-and-athlete-performance-during-international-field-hockey-matches
#6
Blair T Crewther, David Hamilton, Liam P Kilduff, Scott Drawer, Christian J Cook
OBJECTIVES: To investigate the effect of oral contraceptive (OC) use on salivary testosterone (sal-T) concentrations and performance-related statistics in international field hockey matches. DESIGN: A cohort observational study with repeated measures. METHODS: Twenty-three elite female athletes were monitored across four international field hockey matches over a nine-day period. Salivary T was assessed 45min before each match and several match performance statistics were collated; load (i...
September 29, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29031471/gunslingers-poker-players-and-chickens-3-decision-making-under-mental-performance-pressure-in-junior-elite-athletes
#7
Beth L Parkin, Vincent Walsh
BACKGROUND: Having investigated the decision making of world class elite and subelite athletes (see Parkin and Walsh, 2017; Parkin et al., 2017), here the abilities of those at the earliest stage of entry to elite sport are examined. Junior elite athletes have undergone initial national selection and are younger than athletes examined previously (mean age 13 years). Decision making under mental pressure is explored in this sample. During performance an athlete encounters a wide array of mental pressures; these include the psychological impact of errors, negative feedback, and requirements for sustained attention in a dynamic environment (Anshel and Wells, 2000; Mellalieu et al...
2017: Progress in Brain Research
https://www.readbyqxmd.com/read/29028751/injuries-to-the-female-athlete-in-2017-part-ii-upper-and-lower-extremity-injuries
#8
Rachel M Frank, Anthony A Romeo, Charles A Bush-Joseph, Bernard R Bach
No abstract text is available yet for this article.
October 12, 2017: JBJS Reviews
https://www.readbyqxmd.com/read/29028750/injuries-to-the-female-athlete-in-2017-part-i-general-considerations-concussions-stress-fractures-and-the-female-athlete-triad
#9
Rachel M Frank, Anthony A Romeo, Charles A Bush-Joseph, Bernard R Bach
No abstract text is available yet for this article.
October 12, 2017: JBJS Reviews
https://www.readbyqxmd.com/read/29028449/geometric-characteristics-of-the-knee-are-associated-with-a-noncontact-acl-injury-to-the-contralateral-knee-after-unilateral-acl-injury-in-young-female-athletes
#10
James G Levins, Erin C Argentieri, Daniel R Sturnick, Mack Gardner-Morse, Pamela M Vacek, Timothy W Tourville, Robert J Johnson, James R Slauterbeck, Bruce D Beynnon
BACKGROUND: Contralateral anterior cruciate ligament (CACL) injury after recovery from a first-time ACL rupture occurs at a high rate in young females; however, little is known about the risk factors associated with bilateral ACL trauma. HYPOTHESIS: The geometric characteristics of the contralateral knee at the time of the initial ACL injury are associated with risk of suffering a CACL injury in these female athletes. STUDY DESIGN: Case-control study; Level of evidence, 3...
October 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29027102/current-status-of-the-female-athlete-triad-update-and-future-directions
#11
REVIEW
Mary Jane De Souza, Kristen J Koltun, Clara V Etter, Emily A Southmayd
PURPOSE OF REVIEW: This review provides an update on the primary clinical sequelae of the Female Athlete Triad. RECENT FINDINGS: Scientific advancements have contributed to improve understanding of Triad-related conditions, including leptin's role as a potential neuroendocrine link between energy status and reproductive function. Use of finite element analysis of HRpQCT imaging has provided a more accurate assessment of bone geometry and bone strength and may be clinically relevant...
October 11, 2017: Current Osteoporosis Reports
https://www.readbyqxmd.com/read/29023277/diagnosis-and-treatment-of-slipping-rib-syndrome
#12
Cassidy M Foley, Dai Sugimoto, David P Mooney, William P Meehan, Andrea Stracciolini
OBJECTIVE: (1) To investigate the clinical presentation, diagnosis, and treatment of slipping rib syndrome in athletes; (2) to investigate the hooking maneuver for diagnosis of slipping rib syndrome. DESIGN: Retrospective chart review of 362 athletes with rib pain. SETTING: Pediatric-based sports medicine clinic between January 1, 1999, and March 1, 2014. PATIENTS: Costochondritis, Tietze, fractures, rib tip syndrome, and unclear diagnoses were excluded...
October 6, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/29023275/proximal-radial-head-fractures-in-young-gymnasts-a-case-series-of-newly-described-overuse-injuries
#13
Jaron Santelli, Teri M McCambridge, Amy E Valasek, Kathleen Standiford
We report a case series of unilateral Salter-Harris IV fractures of the proximal radial heads in young female gymnasts. To date, there are no previous reports of such injuries in gymnastics. In all 3 athletes, no significant injury preceded presentation or diagnosis. Radiographs and magnetic resonance imaging showed fractures and associated bone marrow edema of the proximal radial head, respectively. All but 1 was treated nonoperatively with success. Given the lack of acute trauma, lack of large effusion, and good range of motion at presentation, these injuries are believed to be chronic in nature and related to overuse...
October 11, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/29018370/empathic-and-self-regulatory-processes-governing-doping-behavior
#14
Ian D Boardley, Alan L Smith, John P Mills, Jonathan Grix, Ceri Wynne
Evidence associating doping behavior with moral disengagement (MD) has accumulated over recent years. However, to date, research examining links between MD and doping has not considered key theoretically grounded influences and outcomes of MD. As such, there is a need for quantitative research in relevant populations that purposefully examines the explanatory pathways through which MD is thought to operate. Toward this end, the current study examined a conceptually grounded model of doping behavior that incorporated empathy, doping self-regulatory efficacy (SRE), doping MD, anticipated guilt and self-reported doping/doping susceptibility...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/29018359/that-escalated-quickly-planning-to-ignore-rpe-can-backfire
#15
Maik Bieleke, Wanja Wolff
Ratings of perceived exertion (RPE) are routinely assessed in exercise science and RPE is substantially associated with physiological criterion measures. According to the psychobiological model of endurance, RPE is a central limiting factor in performance. While RPE is known to be affected by psychological manipulations, it remains to be examined whether RPE can be self-regulated during static muscular endurance exercises to enhance performance. In this experiment, we investigate the effectiveness of the widely used and recommended self-regulation strategy of if-then planning (i...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29017017/the-effect-of-resistance-training-set-configuration-on-strength-power-and-hormonal-adaptation-in-female-volleyball-players
#16
Hamid Arazi, Aida Khanmohammadi, Abbas Asadi, G Gregory Haff
The primary purpose of this investigation was to determine the impact of altering the set structure during an 8-week resistance training program on anthropometric, hormonal, and strength power characteristics. Thirty female volleyball players were recruited for participation and then randomly assigned to one of three resistance training groups: 1) cluster sets (CRT; n=10), 2) traditional sets (TRT: n=10), or 3) control (CON: n=10). All athletes were evaluated for thigh and arm circumference, vertical jump (VJ), 20-m sprint, 4x9-m shuttle-run, 1 repetition maximum (1RM) back squat, bench press, military press, and deadlift prior to and after an 8-week periodized training intervention...
October 10, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29016234/limited-evidence-suggests-a-protective-association-between-oral-contraceptive-pill-use-and-anterior-cruciate-ligament-injuries-in-females-a-systematic-review
#17
Kathleen Samuelson, Ethan M Balk, Erika L Sevetson, Braden C Fleming
CONTEXT: Female athletes aged 14 to 18 years are at particular risk for anterior cruciate ligament (ACL) injuries. Hormonal factors are thought to predispose them to this injury. Oral contraceptive pills (OCPs) might reduce ACL injury risk, although the literature appears controversial. OBJECTIVE: To evaluate the association between OCP use and ACL injuries in women. The secondary objective was to determine the rates of ACL injuries in the pre- and postovulatory phases of the menstrual cycle in OCP and non-OCP (NOCP) users...
October 1, 2017: Sports Health
https://www.readbyqxmd.com/read/28994332/ultrasonography-findings-and-physical-examination-outcomes-in-dancers-with-and-without-patellofemoral-pain
#18
Itzhak Siev-Ner, Myriam D Stern, Shay Tenenbaum, Alexander Blankstein, Aviva Zeev, Nili Steinberg
OBJECTIVES: To identify whether a physical examination for patello-femoral pain (PFP) is related to ultrasonography findings at the knee, and to identify possible factors related to PFP in young dancers. METHODS: Sixty-seven young female dancers (7th grade, aged 12.8±0.5) from three schools with identical special dance programs were included in the study. All the dancers were interviewed for demographic details, dance background, and training intensity; were evaluated for anthropometric measurements; underwent physical examination of both knees for PFP and for knee range of motion (ROM); and, had ultrasonography assessment for pathologies and of anatomical parts of their knees...
October 10, 2017: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/28993881/maximal-rate-of-heart-rate-increase-correlates-with-fatigue-recovery-status-in-female-cyclists
#19
Maximillian J Nelson, Clint R Bellenger, Rebecca L Thomson, Eileen Y Robertson, Kade Davison, Daniela Schäfer Olstad, Jonathan D Buckley
PURPOSE: Being able to identify how an athlete is responding to training would be useful to optimise adaptation and performance. The maximal rate of heart rate increase (rHRI), a marker of heart rate acceleration has been shown to correlate with performance changes in response to changes in training load in male athletes; however, it has not been established if it also correlates with performance changes in female athletes. METHODS: rHRI and cycling performance were assessed in six female cyclists following 7 days of light training (LT), 14 days of heavy training (HT) and a 10 day taper period...
October 9, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28993288/the-relationship-between-sacral-slope-and-symptomatic-isthmic-spondylolysis-in-a-cohort-of-high-school-athletes-a-retrospective-analysis
#20
Leigh F Hanke, Yetsa A Tuakli-Wosornu, Julian Harrison, Peter J Moley
BACKGROUND: Spondylolysis with and without anterolisthesis are the most common causes of structural back pain in children and adolescents, but few predictive factors have been confirmed. An association between abnormal sacro-pelvic orientation and both spondylolysis and spondylolisthesis has been supported in the literature. Sacral slope and other sacro-pelvic measurements are easily accessible variables that could aid clinicians in assessing active adolescents with low back pain, particularly when the diagnosis of spondylolysis is suspected...
October 6, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
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