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Journal of Science and Medicine in Sport

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https://www.readbyqxmd.com/read/30001949/electrocardiographic-findings-in-elite-professional-cyclists-the-2017-international-recommendations-in-practice
#1
Anna L Beale, Mallaury V Julliard, Philippe Maziarski, Jean-Luc Ziltener, Haran Burri, Philippe Meyer
OBJECTIVES: To categorize ECG findings into normal, borderline or abnormal in a team of professional elite cyclists according to the 2017 international recommendations. DESIGN: A cross-sectional study was performed. METHODS: Twelve-lead ECGs collected between 2012 and 2015 as part of an annual routine examination for a team of professional elite cyclists were analysed, and findings classified as normal, borderline or abnormal according to the 2017 recommendations...
July 5, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29980379/fitness-knee-function-and-competition-performance-in-professional-alpine-skiers-after-acl-injury
#2
Robert Csapo, Christian Hoser, Peter Gföller, Christian Raschner, Christian Fink
OBJECTIVES: To assess the fitness of elite alpine skiers during recovery from anterior cruciate ligament (ACL) reconstruction and changes in performance level after return to competition. DESIGN: Retrospective cohort study. METHODS: The database of a specialized sports clinic was screened for professional alpine skiers with a history of ACL rupture and reconstruction. Strength and further functional tests as well as questionnaire data reflecting the athletes' subjective perception of pain, function in activities of daily living and physical activity levels were extracted...
June 28, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29960798/military-applications-of-soldier-physiological-monitoring
#3
Karl E Friedl
Wearable physiological status monitoring is part of modern precision medicine that permits predictions about an individual's health and performance from their real-time physiological status (RT-PSM) instead of relying on population-based predictions informed by estimated human, mission, and environmental/ambient conditions. RT-PSM systems have useful military applications if they are soldier-acceptable and provide important actionable information. Most commercially available systems do not address relevant military needs, typically lack the validated algorithms that make real time computed information useful, and are not open architected to be integrated with the soldier technological ecology...
June 20, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29958840/a-multi-year-injury-epidemiology-analysis-of-an-elite-national-junior-tennis-program
#4
Danielle T Gescheit, Stuart J Cormack, Rob Duffield, Stephanie Kovalchik, Tim O Wood, Melanie Omizzolo, Machar Reid
OBJECTIVES: To profile multi-year injury incidence and severity trends in elite junior tennis players from a national program. DESIGN: Prospective cohort. METHODS: Injury data was collated by sex, age and region for all nationally-supported Australian junior players (58m, 43f 13-18y) between 2012-2016. Injury was defined as a physical complaint from training/matchplay interrupting training/matchplay determined by presiding physiotherapists and doctors...
June 19, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29958839/the-influence-of-match-characteristics-and-experience-on-decision-making-performance-in-afl-umpires
#5
Sean L Corrigan, Dan B Dwyer, Briana Harvey, Paul B Gastin
OBJECTIVES: The purpose of this study was to investigate the effects of match characteristics and elite level umpiring experience on the decision-making performance of umpires in the Australian Football League (AFL). DESIGN: Cross Sectional Study. METHODS: All decisions from the 2014 AFL home and away season made by 32 male AFL field umpires (age 33.1±5.0years, AFL umpire experience 122±105 matches) were classified by a panel of four expert umpire coaches into correct, missed and unwarranted categories...
June 19, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29958838/seasonal-time-loss-match-injury-rates-and-burden-in-south-african-under-16-rugby-teams
#6
Nicola Sewry, Evert Verhagen, Mike Lambert, Willem van Mechelen, Clint Readhead, Wayne Viljoen, James Brown
OBJECTIVES: Youth rugby union is a popular sport with a high injury incidence density (IID) and burden. This high risk has called for further research into the factors affecting the injuries in youth rugby. The aim of the study was to analyse time-loss IID and burden in multiple schoolboy rugby teams over a season and the potential factors associated with injury. DESIGN: Prospective cohort METHODS: All time-loss injuries were recorded from three schools for the whole season...
June 19, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29945830/the-influence-of-sleep-and-training-load-on-illness-in-nationally-competitive-male-australian-football-athletes-a-cohort-study-over-one-season
#7
Dominic Fitzgerald, Christopher Beckmans, David Joyce, Kathryn Mills
OBJECTIVES: To determine the incidence of illness, and identify the relationship between sleep, training load and illness in nationally competitive Australian football athletes. Second, to assess multivariate effect between training load and/or sleep variables. DESIGN: Cohort study. METHODS: Retrospective analyses of prospectively collected cohort data were conducted on forty-four male athletes over a 46-week season. The primary outcome was illness incidence, recorded daily by medical doctors...
June 19, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29934212/the-impact-of-sport-related-stressors-on-immunity-and-illness-risk-in-team-sport-athletes
#8
REVIEW
Lauren C Keaney, Andrew E Kilding, Fabrice Merien, Deborah K Dulson
OBJECTIVES: Elite team-sport athletes are frequently exposed to stressors that have the potential to depress immunity and increase infection risk. Therefore, the purpose of this review is to describe how team-sport stressors impact upon immune responses, along with exploring whether alterations in these markers have the potential to predict upper respiratory tract illness symptoms. DESIGN: Narrative review. METHODS: Salivary secretory immunoglobulin A (SIgA) and T-cell markers have been shown to predict infection risk in individual endurance athletes...
June 19, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29934211/reasons-and-predictors-of-discontinuation-of-running-after-a-running-program-for-novice-runners
#9
Tryntsje Fokkema, Fred Hartgens, Bas Kluitenberg, Evert Verhagen, Frank J G Backx, Henk van der Worp, Sita M A Bierma-Zeinstra, Bart W Koes, Marienke van Middelkoop
OBJECTIVES: To determine the proportion of participants of a running program for novice runners that discontinued running and investigate the main reasons to discontinue and characteristics associated with discontinuation. DESIGN: Prospective cohort study. METHODS: The study included 774 participants of Start to Run, a 6-week running program for novice runners. Before the start of the program, participants filled-in a baseline questionnaire to collect information on demographics, physical activity and perceived health...
June 18, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29921504/motor-learning-of-a-dynamic-balance-task-influence-of-lower-limb-power-and-prior-balance-practice
#10
Louis-Solal Giboin, Markus Gruber, Andreas Kramer
OBJECTIVES: We wanted to verify if the "learning to learn" effect observed in the learning of visuomotor tasks is also present when learning a balance task, i.e., whether the learning rate of a balance task is improved by prior practice of similar balance tasks. DESIGN: Single centre, parallel group, controlled training study. METHODS: 32 young healthy participants were divided into a control and a training group. The training group's practice consisted of 90 trials of three balance tasks...
June 7, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29910153/international-consensus-on-military-research-priorities-and-gaps-survey-results-from-the-4th-international-congress-on-soldiers-physical-performance
#11
Mita Lovalekar, Marilyn A Sharp, Daniel C Billing, Jace R Drain, Bradley C Nindl, Edward J Zambraski
OBJECTIVES: The objectives of this study were to identify perceived priorities related to military personnel's health and physical performance, among attendees at the 4th International Congress on Soldiers' Physical Performance (ICSPP), and to determine if perceived priorities had changed between the 3rd ICSPP survey held in 2014 and the 4th ICSPP survey held in 2017. DESIGN: Electronic survey. METHODS: Respondents were asked to grade priority areas on a Likert scale, and average ratings were used to rank priority areas...
June 6, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29907516/repeatability-of-tibial-acceleration-measurements-made-on-children-during-walking-and-running
#12
Oren Tirosh, Guy Orland, Alon Eliakim, Dan Nemet, Nili Steinberg
OBJECTIVES: To determine the between-visit reliability of an accelerometer as a measure of lower-extremity impact acceleration at a variety of gait speeds in children. DESIGN: Absolute reliability assessment. METHODS: Ten children with no known gait pathology attended two testing sessions, three weeks apart. A tri-axial accelerometer was fixed to the child's distal tibia to measure peak positive acceleration responses while walking and running on the treadmill at three different speeds (comfortable walking, threshold walking, and jogging)...
June 5, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29886135/immediate-and-sustained-effects-of-intermittent-exercise-on-inhibitory-control-and-task-related-heart-rate-variability-in-adolescents
#13
Sebastian Ludyga, Uwe Pühse, Stefano Lucchi, Jonas Marti, Markus Gerber
OBJECTIVES: To examine the immediate and sustained effects of intermittent exercise sessions at different intensities on inhibitory control and task-related heart rate variability (HRV) in adolescents. DESIGN: Using cluster-randomization, participants from six classes (n=94) were allocated to groups performing 20min of intermittent exercise at moderate (MIE) or high intensity (HIE) and a control group (CON). METHODS: Using a computer-based Flanker task, inhibitory control was assessed in a classroom setting prior to and following exercise as well as 30 and 60min after exercise cessation...
June 5, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29910152/biomechanical-correlates-of-running-performance-in-active-children
#14
Sian Williams, Kevin Netto, Renee Kennedy, Jarrad Turner-Bryndzej, Ryan Campbell, Simon M Rosalie
OBJECTIVES: Examine the running kinematics in healthy, physically active prepubescent children and to determine if specific biomechanical factors correlate with running performance. DESIGN: Cross-sectional study. METHODS: Fifteen children (age 9years, ±11months) completed a 1km time trial before undergoing three-dimensional running motion analysis. RESULTS: A strong positive correlation was observed between the biomechanical variables of stride length (p<...
June 4, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29884594/the-relationships-between-multiaxial-loading-history-and-tibial-strains-during-load-carriage
#15
Julie Hughes, D Clark Dickin, He Wang
OBJECTIVES: To determine if a history of exercise involving multiaxial loading, through soccer participation, influences tibial stains during incremented load carriage. DESIGN: Cross-sectional study. METHODS: 20 female soccer players (20±1 yr) and 20 mass- and height-matched healthy women (21±1 yr) participated in walking tasks with 0kg, 10kg, 20kg, and 30kg loads on a force instrumented treadmill at 1.67m/s. Subject-specific tibial CT models were combined with subject-specific musculoskeletal models for forward-dynamic simulations and finite element analyses...
June 1, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29945832/comparing-self-reported-physical-activity-and-sedentary-time-to-objective-fitness-measures-in-a-military-cohort
#16
Sarah J de la Motte, Marleen M Welsh, Valerie Castle, Dan Burnett, Gary D Gackstetter, Alyson J Littman, Edward J Boyko, Tomoko I Hooper
OBJECTIVES: Regular vigorous physical activity (PA) and high levels of physical fitness (PF) confer health benefits. Conversely, sedentary time is a risk factor for chronic illness, independent of PA. We evaluated associations between self-reported PA, sedentary time, and objective PF measures in military Service members. DESIGN: Cross-sectional study including 10,105 Air Force Millennium Cohort participants with a valid physical fitness assessment (PFA). METHODS: Linear regression assessed associations between self-report PA, screen time, and usual activity and abdominal circumference (AC) and VO2 max; logistic regression was used for PFA failure...
May 31, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29895406/beneficial-postprandial-lipaemic-effects-of-interrupting-sedentary-time-with-high-intensity-physical-activity-versus-a-continuous-moderate-intensity-physical-activity-bout-a-randomised-crossover-trial
#17
Benjamin D Maylor, Julia K Zakrzewski-Fruer, Charlie J Orton, Daniel P Bailey
OBJECTIVES: To compare the postprandial cardiometabolic response to prolonged sitting, continuous moderate-intensity physical activity (PA) followed by prolonged sitting, and interrupting prolonged sitting with hourly high-intensity PA breaks. DESIGN: Three-condition randomised crossover trial. METHODS: Fourteen sedentary and inactive adults aged 29±9years took part in three, 8-h conditions: (1) prolonged sitting (SIT), (2) a continuous 30-min moderate-intensity PA bout followed by prolonged sitting (CONT-SIT), and (3) sitting interrupted hourly with 2min 32s high-intensity PA bouts (SIT-ACT)...
May 31, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29884595/the-incidence-and-burden-of-time-loss-injury-in-australian-men-s-sub-elite-football-soccer-a-single-season-prospective-cohort-study
#18
Matthew Whalan, Ric Lovell, Robert McCunn, John A Sampson
OBJECTIVES: This study aimed to conduct the first injury surveillance study in sub-elite football in Australia, using methods from the international football consensus statement. DESIGN: Descriptive epidemiological study. METHODS: 1049 sub-elite football players were recruited during the 2016 season. Injury and exposure data was collected by trained Primary Data Collectors (PDCs) who attended every training session and match. RESULTS: There were 1041 time loss injuries recorded during 52,127h of exposure resulting in an injury incidence rate of 20 injuries/1000h (95% Confidence Interval [CI]: 15...
May 31, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29983354/movement-profile-influences-systemic-stress-and-biomechanical-resilience-to-high-training-load-exposure
#19
Barnett S Frank, Anthony C Hackney, Claudio L Battaglini, Troy Blackburn, Stephen W Marshall, Micheal Clark, Darin A Padua
OBJECTIVES: Determine the influence of movement profile on systemic stress and mechanical loading before and after high training load exposure. DESIGN: Cross-sectional cohort study. METHODS: 43 physically active, college-aged field or court sport female athletes participated in this study. Participants were assigned to a "excellent" (n=22; age=20.5±1.9yrs, height=1.67±0.67m, mass=64.5±7.8kg) or "poor" (n=21; age=20.4±1...
May 25, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29807719/improving-running-economy-by-transitioning-to-minimalist-footwear-a-randomised-controlled-trial
#20
K Lindlein, A Zech, A Zoch, K-M Braumann, K Hollander
OBJECTIVES: Ongoing debates about benefits and risks of barefoot- and minimally-shod running have, to date, revealed no conclusive findings for long-term effects on physical performance. The purpose of this study was to examine the effects of an 8-week transition to minimalist footwear (MFW) on running economy (RE). DESIGN: Randomised controlled trial. METHODS: Thirty-two male, habitually-shod runners were assigned randomly to an 8-week training intervention either in minimalist (=intervention group) or conventional running shoes (=control group)...
May 25, 2018: Journal of Science and Medicine in Sport
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