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Journal of Science and Medicine in Sport

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https://read.qxmd.com/read/30987883/using-360%C3%A2-virtual-reality-as-a-decision-making-assessment-tool-in-sport
#1
Aden Kittel, Paul Larkin, Nathan Elsworthy, Michael Spittle
OBJECTIVES: To examine the reliability, construct validity and ecological validity of 360° VR and match broadcast footage for off-field decision-making assessment in Australian football umpires. DESIGN: Validation assessments with test re-test reliability. METHODS: Two video-based tests of 60 clips each were developed to assess Australian football umpire decision-making, including 360° video of small-sided Australian football games and match broadcast footage of AFL games...
April 5, 2019: Journal of Science and Medicine in Sport
https://read.qxmd.com/read/30940441/repeated-muscle-glycogen-supercompensation-with-four-days-recovery-between-exhaustive-exercise
#2
Thomas M Doering, Gregory R Cox, José L Areta, Vernon G Coffey
OBJECTIVES: To determine if a 4 d period of high carbohydrate intake can supercompensate muscle glycogen and exercise work capacity on back-to-back occasions. DESIGN: Seven trained cyclists (6 male, VO2 peak: 57 ± 4 mL kg-1  min-1 ) completed a 9-d experimental period, consisting of three intermittent exhaustive cycling trials on days 1 (trial 1), 5 (trial 2) and 9 (trial 3). Following trial 1 cyclists were fed a high carbohydrate diet (˜10 g kg-1  day-1 ) for eight days to assess their capacity to repeatedly supercompensate muscle glycogen with 4 d recovery...
March 23, 2019: Journal of Science and Medicine in Sport
https://read.qxmd.com/read/30928238/normalization-influences-knee-abduction-moment-results-could-it-influence-acl-injury-research-too-response-to-letter-to-the-editor-by-dr-timothy-e-hewett
#3
LETTER
Marc F Norcross
No abstract text is available yet for this article.
March 22, 2019: Journal of Science and Medicine in Sport
https://read.qxmd.com/read/30956062/a-source-of-systematic-bias-in-self-reported-physical-activity-the-cutpoint-bias-hypothesis
#4
Tim S Olds, Sjaan R Gomersall, Spencer T Olds, Kate Ridley
OBJECTIVES: Estimates of adults' moderate-to-vigorous physical activity (MVPA) based on self-report are generally higher than estimates derived from criterion measures. This study examines a possible explanation for part of this discrepancy: the cutpoint bias hypothesis. This hypothesis proposes that inter- and intra-individual variability in energy expenditure, combined with the fact that adults perform a high proportion of daily activities at or just above the traditional 3 MET cutpoint, result in systematic over-estimates of MVPA...
March 20, 2019: Journal of Science and Medicine in Sport
https://read.qxmd.com/read/30979675/prevalence-of-sports-related-injuries-in-paralympic-judo-an-exploratory-study
#5
Kristina Fagher, Osman Hassan Ahmed, Nicolina Pernheim, Emma Varkey
OBJECTIVES: The aim was to assess the 1-year retrospective prevalence of athletes reporting a sports-related injury among Paralympic judokas with visual impairment (VI), and to identify any associations between injury, vision class, gender and weight category. DESIGN: Cross-sectional retrospective study. METHODS: The data were collected through an adapted questionnaire given to athletes with VI during an international training camp. A total of 45 Paralympic judokas answered the questionnaire...
March 18, 2019: Journal of Science and Medicine in Sport
https://read.qxmd.com/read/30940442/the-prevalence-of-hand-and-wrist-osteoarthritis-in-elite-former-cricket-and-rugby-union-players
#6
Mary E Jones, Madeleine A M Davies, Karishma Shah, Simon Kemp, Nick Peirce, Kirsten M Leyland, Keith A Stokes, Andrew D Judge, Julia L Newton, Dominic Furniss, Nigel K Arden
OBJECTIVES: This study aimed to determine the prevalence of hand and wrist osteoarthritis in former elite cricket and rugby union players, by sport and playing position, and to define the prevalence of severe hand injury, and its association with hand osteoarthritis. DESIGN: Cross-sectional. METHODS: Data from cross-sectional studies of former elite male cricket and rugby players were used to determine the prevalence of hand pain, physician-diagnosed osteoarthritis, and previous severe injury...
March 16, 2019: Journal of Science and Medicine in Sport
https://read.qxmd.com/read/30930142/injury-prevention-strategies-specific-to-pre-elite-athletes-competing-in-olympic-and-professional-sports-a-systematic-review
#7
REVIEW
Erin A Smyth, Phillip Newman, Gordon Waddington, Juanita R Weissensteiner, Michael K Drew
OBJECTIVES: To describe and evaluate injury prevention interventions for pre-elite athletes who compete in an Olympic or professional sport. DESIGN: Systematic review. METHODS: This review was prospectively registered (PROSPERO CRD42017065083) and a systematic electronic search was conducted in May 2017. The following inclusion criteria were applied: (1) studies including and analysing data specific to pre-elite athletes (determined by the T3/T4 levels of the FTEM model); (2) featured injury prevention interventions; (3) provided sufficient data related to injury such that the effect can be analysed e...
March 12, 2019: Journal of Science and Medicine in Sport
https://read.qxmd.com/read/30922550/emotional-intelligence-and-mood-states-impact-on-the-stress-response-to-a-treadmill-ultramarathon
#8
Christopher C F Howe, Elizabeth Pummell, Susan Pang, Owen Spendiff, Hannah J Moir
OBJECTIVES: Participants of ultramarathon events experience a complex interaction of psychophysiological stressors. Therefore, the purpose of this study was to investigate the role of trait emotional intelligence (trait EI) on mood states and serum cortisol responses to a 80.5km treadmill ultramarathon. DESIGN: Twelve participants completed an 80.5km time-trial on a motorised treadmill in the fastest possible time. METHODS: Participants' trait EI was measured prior to the trial...
March 12, 2019: Journal of Science and Medicine in Sport
https://read.qxmd.com/read/30885614/transmissibility-of-whole-body-vibrations-and-injury-risk-in-alpine-skiing
#9
Matej Supej, Jan Ogrin
OBJECTIVES: Whole body vibrations in alpine skiing are a potential cause for frequent overuse and acute injuries. Therefore, the aim of the study was to investigate the transmissibility of vibrations from the skis to lower back and head. Attention was addressed to distinguish shocks and transient vibrations from long-lasting vibrations. DESIGN: Whole body vibrations were analysed in snow-plough swinging, basic swinging, short swinging and carved turns performed by eight highly skilled skiers...
March 12, 2019: Journal of Science and Medicine in Sport
https://read.qxmd.com/read/30902539/mid-flight-trunk-flexion-and-extension-altered-segment-and-lower-extremity-joint-movements-and-subsequent-landing-mechanics
#10
Daniel J Davis, Taylour J Hinshaw, Meghan L Critchley, Boyi Dai
OBJECTIVES: To assess the effect of mid-flight trunk flexion and extension on the movements of body segments and lower extremity joints and subsequent landing mechanics during a jump-landing task. DESIGN: Participants performed three jump-landing conditions in a randomized order. METHODS: Forty-one participants completed jump-landing trials when performing three different mid-flight trunk motion: reaching forward, reaching up, and reaching backward...
March 8, 2019: Journal of Science and Medicine in Sport
https://read.qxmd.com/read/30878293/subgroup-characteristics-of-patients-with-chronic-ankle-instability-in-primary-care
#11
Adinda K E Mailuhu, Edwin H G Oei, John M van Ochten, Patrick J E Bindels, Sita M A Bierma-Zeinstra, Marienke van Middelkoop
OBJECTIVES: To examine clinical and radiological characteristics of participants with an ankle sprain in general practice, classified into subgroups of a previously described chronic ankle instability (CAI) model. DESIGN: Cross-sectional study. METHODS: 206 participants, who visited their general practitioner with a lateral ankle sprain 6-12 months before inclusion, completed a questionnaire, physical examination, radiography and magnetic resonance imaging...
March 6, 2019: Journal of Science and Medicine in Sport
https://read.qxmd.com/read/30902540/transitioning-from-club-to-national-teams-training-and-match-load-profiles-of-international-footballers
#12
Denny Noor, Alan McCall, Mark Jones, Craig Duncan, Fabian Ehrmann, Tim Meyer, Rob Duffield
OBJECTIVES: To quantify and profile the training and match loads of international footballers as they transition from club-to-camp-to-tournament contexts during multiple international tournaments. DESIGN: Retrospective single-cohort observational study. METHODS: External (session duration and count) and internal (session Rating of Perceived Exertion [s-RPE]) load data of all outfield players from the same national team were compared between club, pre-tournament camp and initial tournament phases of 3 recent international competitions...
March 1, 2019: Journal of Science and Medicine in Sport
https://read.qxmd.com/read/30898513/flexible-learning-spaces-reduce-sedentary-time-in-adolescents
#13
Katharina E Kariippanon, Dylan P Cliff, Anthony D Okely, Anne-Maree Parrish
OBJECTIVES: Many schools internationally are replacing traditional classrooms (TC) with innovative flexible learning spaces (FLS) to improve academic outcomes. Via a stealth approach, there may be additional unintended health benefits if students reduce their total and prolonged sitting. The aim of this study was to compare student sitting patterns between TC and FLS. DESIGN: School-based cross-over trial. METHODS: Students at nine secondary schools (n=191, M age=13...
March 1, 2019: Journal of Science and Medicine in Sport
https://read.qxmd.com/read/30885613/national-rugby-league-match-scheduling-and-rate-of-concussion
#14
Andrew J Gardner, David R Howell, Grant L Iverson
OBJECTIVES: The aims of this study were to evaluate the relationship between pre-match rest days, match location, time of season, and match outcome with diagnosed concussion and use of the Concussion Interchange Rule (CIR) during the 2014 NRL season. DESIGN: Descriptive observational study. METHODS: This study reviewed all instances of diagnosed concussions, CIR activations, and match characteristics during the 2014 NRL season. Information pertaining to the use of the CIR was obtained from the league...
February 22, 2019: Journal of Science and Medicine in Sport
https://read.qxmd.com/read/30846355/crossfit-and-rhabdomyolysis-a-case-series-of-11-patients-presenting-at-a-single-academic-institution
#15
Benjamin S Hopkins, Daniel Li, Mark Svet, Kartik Kesavabhotla, Nader S Dahdaleh
OBJECTIVES: CrossFit is an increasingly popular high intensity work out program geared towards high repetition and intensity done in short intervals. Recently, documented cases of rhabdomyolysis (muscle necrosis and extreme muscle breakdown) after CrossFit participation have become increasingly concerning to physicians and participants alike. DESIGN: Retrospective cohort study. METHODS: All patients who presented to the main hospital at a major academic center complaining of an injury sustained performing CrossFit between June 2010 and June 2016 were identified by the key phrases 'CrossFit', 'crossfit', 'Crossfit' or 'cross fit'...
February 22, 2019: Journal of Science and Medicine in Sport
https://read.qxmd.com/read/30803818/the-backwards-comparability-of-wrist-worn-geneactiv-and-waist-worn-actigraph-accelerometer-estimates-of-sedentary-time-in-children
#16
Lynne M Boddy, Robert J Noonan, Alex V Rowlands, Liezel Hurter, Zoe R Knowles, Stuart J Fairclough
OBJECTIVES: To examine the backward comparability of a range of wrist-worn accelerometer estimates of sedentary time (ST) with ActiGraph 100countmin-1 waist ST estimates. DESIGN: Cross-sectional, secondary data analysis METHODS: One hundred and eight 10-11-year-old children (65 girls) wore an ActiGraph GT3X+ accelerometer (AG) on their waist and a GENEActiv accelerometer (GA) on their non-dominant wrist for seven days. GA ST data were classified using a range of thresholds from 23 to 56mg ST estimates were compared to AG ST 100countmin-1 data...
February 11, 2019: Journal of Science and Medicine in Sport
https://read.qxmd.com/read/30827845/injury-profiles-in-elite-women-s-t20-cricket
#17
A Warren, S Dale, S McCaig, C Ranson
OBJECTIVES: To Describe the injury incidence and prevalence during two years of a professional women's T20 cricket tournament. DESIGN: Prospective cohort study. METHODS: Injuries were recorded prospectively for 68 matches during a professional women's T20 tournament in 2016 and 2017. There were six teams of 15 players. Participants were female, aged between 16-38 years (mean 23.4±4.8). Time-loss and non time-loss incidence and prevalence were calculated for match days, region, skill group, mode and activity at time of injury...
February 7, 2019: Journal of Science and Medicine in Sport
https://read.qxmd.com/read/30772188/cardiovascular-effects-and-risks-of-recreational-alpine-skiing-in-the-elderly
#18
Valentina Alice Rossi, Christian Schmied, Josef Niebauer, David Niederseer
OBJECTIVES: Alpine skiing is one of the most popular recreational winter sports and attracts millions of tourists every year alone in the Alpine region. Several studies highlight the positive effects of alpine skiing as aerobic physical training and isometric muscle activity that is able to increase exercise capacity and reduce cardiovascular risk factors. However, a certain cardiovascular risk mainly related to an abrupt increase of myocardial oxygen consumption during skiing especially in otherwise sedentary subjects and effects of hypoxia in untrained patients have to be acknowledged...
January 31, 2019: Journal of Science and Medicine in Sport
https://read.qxmd.com/read/30770192/dose-response-between-frequency-of-breaks-in-sedentary-time-and-glucose-control-in-type-2-diabetes-a-proof-of-concept-study
#19
Aye C Paing, Kathryn A McMillan, Alison F Kirk, Andrew Collier, Allan Hewitt, Sebastien F M Chastin
OBJECTIVES: This study aimed to investigate dose-response between frequency of breaks in sedentary time and glucose control. DESIGN: Randomised three-treatment, two-period balanced incomplete block trial. METHODS: Twelve adults with type 2 diabetes (age, 60±11years; body mass index, 30.2±4.7kg/m2 ) participated in two of the following treatment conditions: sitting for 7h interrupted by 3min light-intensity walking breaks every (1) 60min (Condition 1), (2) 30min (Condition 2), and (3) 15min (Condition 3)...
January 31, 2019: Journal of Science and Medicine in Sport
https://read.qxmd.com/read/30765315/individual-flexion-stiffness-of-ski-boots
#20
Lorenz Immler, Kurt Schindelwig, Dieter Heinrich, Werner Nachbauer
OBJECTIVES: Ski boots are designed to transfer forces from skier to ski. This transfer is among others affected by the flexion stiffness (FS) and so effects safety and skiing performance. Previous studies have used devices with prosthetic legs to evaluate FS, however, influencing factors like the foot and lower leg shape or individual buckle closure are not considered. The purpose of the study was to (i) develop a device to measure the individual flexion stiffness (IFS) of ski boots worn by skiers, to (ii) determine the repeatability of the measurement, and to (iii) compare the IFS with the nominal flex index of the manufacturers...
January 29, 2019: Journal of Science and Medicine in Sport
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