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Journal of Science and Medicine in Sport

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https://www.readbyqxmd.com/read/29789265/the-physiological-and-perceptual-demands-of-running-on-a-curved-non-motorised-treadmill-implications-for-self-paced-training
#1
Patrick P J M Schoenmakers, Kate E Reed
OBJECTIVES: To compare physiological and perceptual response of running on a curved non-motorized treadmill (cNMT) with running on a motorized treadmill (MT), and to determine the running velocity at which a physiological response≥90% V˙O2 max was elicited. DESIGN & METHODS: 13 trained male runners (mean±SD; 36±11years, 1.80±0.06m, 70±4kg, V˙O2 max: 57.3±3.5 mLkg-1 min-1 ) performed an incremental running test on a MT to determine V˙O2 max and the accompanying maximum velocity (Vmax)...
May 19, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29789263/gross-motor-skills-in-toddlers-prevalence-and-socio-demographic-differences
#2
Sanne L C Veldman, Rachel A Jones, Rute Santos, Eduarda Sousa-Sá, Anthony D Okely
OBJECTIVES: Gross motor skills (GMS) are a vital component of a child's development. Monitoring levels and correlates of GMS is important to ensure appropriate strategies are put in place to promote these skills in young children. The aim of this study was to describe the current level of GMS development of children aged 11-29months and how these levels differ by age, sex, BMI and socio-economic status. DESIGN: Cross-sectional study. METHODS: This study involved children from 30 childcare services in NSW, Australia...
May 19, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29784554/renal-stress-and-kidney-injury-biomarkers-in-response-to-endurance-cycling-in-the-heat-with-and-without-ibuprofen
#3
Brendon P McDermott, Cody R Smith, Cory L Butts, Aaron R Caldwell, Elaine C Lee, Jakob L Vingren, Colleen X Munoz, Laura J Kunces, Keith Williamson, Matthew S Ganio, Lawrence E Armstrong
Exercise, especially in the heat, can contribute to acute kidney injury, which can expedite chronic kidney disease onset. The additional stress of ibuprofen use is hypothesized to increase renal stress. OBJECTIVES: To observe the effects of endurance cycling in the heat on renal function. Secondarily, we investigated the effect of ibuprofen ingestion on kidney stress. DESIGN: Randomized, placebo controlled and observational methods were utilized. METHODS: Forty cyclists (52±9y, 21...
May 16, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29789266/microvascular-volume-in-symptomatic-achilles-tendons-is-associated-with-visa-a-score
#4
S F E Praet, J H Ong, C Purdam, M Welvaert, G Lovell, L Dixon, J E Gaida, J Anglim, S Manzanero, N Vlahovich, D Hughes, G Waddington
OBJECTIVES: The role of neovascularisation in tendinopathy is still poorly understood, potentially due to technical limitations of conventional power Doppler ultrasound. This study aimed to investigate the association between contrast-enhanced ultrasound (CEUS) microvascular volume (MV), Victorian Institute of Sports Assessment-Achilles (VISA-A) scores and intrinsic Achilles tendon tenderness, as well as two different Power Doppler modes. DESIGN: Cross-sectional study...
May 15, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29789262/eccentric-cycling-emphasising-a-low-cardiopulmonary-demand-increases-leg-strength-equivalent-to-workload-matched-concentric-cycling-in-middle-age-sedentary-males
#5
Michael C Lewis, Gregory E Peoples, Herbert Groeller, Marc A Brown
OBJECTIVES: This study determined if eccentric endurance cycling, eliciting a low cardiovascular demand, could stimulate muscle strength adaptations in sedentary middle-aged males. DESIGN: Twenty-four middle-aged sedentary males were allocated to concentric (CON) or matched workload eccentric (ECC) cycling (60% peak concentric workload) according to their maximal voluntary isometric quadriceps strength. METHODS: Seventeen participants [42...
May 15, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29729964/the-test-retest-reliability-and-criterion-validity-of-a-high-intensity-netball-specific-circuit-test-the-net-test
#6
Sean F Mungovan, Paula J Peralta, Gregory C Gass, Aaron T Scanlan
OBJECTIVES: To examine the test-retest reliability and criterion validity of a high-intensity, netball-specific fitness test. DESIGN: Repeated measures, within-subject design. METHODS: Eighteen female netball players competing in an international competition completed a trial of the Net-Test, which consists of 14 timed netball-specific movements. Players also completed a series of netball-relevant criterion fitness tests. Ten players completed an additional Net-Test trial one week later to assess test-retest reliability using intraclass correlation coefficient (ICC), typical error of measurement (TEM), and coefficient of variation (CV)...
April 12, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29764731/how-much-is-enough-in-rehabilitation-high-running-workloads-following-lower-limb-muscle-injury-delay-return-to-play-but-protect-against-subsequent-injury
#7
Jordan Stares, Brian Dawson, Peter Peeling, Michael Drew, Jarryd Heasman, Brent Rogalski, Marcus Colby
OBJECTIVES: Examine the influence of rehabilitation training loads on return to play (RTP) time and subsequent injury in elite Australian footballers. DESIGN: Prospective cohort study. METHODS: Internal (sessional rating of perceived exertion: sRPE) and external (distance, sprint distance) workload and lower limb non-contact muscle injury data was collected from 58 players over 5 seasons. Rehabilitation periods were analysed for running workloads and time spent in 3 rehabilitation stages (1: off-legs training, 2: non-football running, 3: group football training) was calculated...
April 10, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29650336/acute-physiological-responses-to-low-intensity-blood-flow-restriction-cycling
#8
H J Thomas, B R Scott, J J Peiffer
OBJECTIVES: Blood flow restriction (BFR) during interval cycling may stimulate aerobic and anaerobic adaptations. However, acute physiological responses to BFR interval cycling have not been extensively investigated. DESIGN: Eighteen males completed low-intensity (LI), low-intensity with BFR (LIBFR ) and high-intensity (HI) interval cycling sessions in randomised and counterbalanced order. These included a standardised warm-up and three two-min intervals interspersed with two-min recovery...
April 9, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29685827/test-design-and-individual-analysis-in-wheelchair-rugby
#9
David S Haydon, Ross A Pinder, Paul N Grimshaw, William S P Robertson
OBJECTIVES: Use a task vehicle of sprint testing in wheelchair rugby (WCR) to explore the impact of small changes to test design using both group and individual analysis. DESIGN: Exploratory, repeated measures, on-court study METHOD: 25 national or international level wheelchair rugby players completed 5×5m sprints under two conditions: (i) an acceleration from standstill in their own time, and (ii) an 'active' start, simulating a key aspect of performance. Video analysis and accelerometer data were used to measure key kinematic and performance variables with a focus on the first three strokes...
April 7, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29653900/use-of-in-home-stationary-cycling-equipment-among-parents-in-a-family-based-randomized-trial-intervention
#10
Ryan E Rhodes, Mark R Beauchamp, Chris M Blanchard, Shannon S D Bredin, Darren E R Warburton, Ralph Maddison
OBJECTIVES: The purpose of this study was to examine the use of home exercise equipment in the form of exergame cycling compared to a stationary recumbent bicycle ergometer in front of TV in the home over 3 months among parents of an intervention with their inactive children. The primary outcome was bike use (total weekly duration). Predictors of bike use in the form of theory of planned behavior and self-determination theory were also examined. DESIGN: Randomized controlled trial...
April 3, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29650337/knee-flexion-not-hip-extension-strength-is-persistently-reduced-following-hamstring-strain-injury-in-australian-football-athletes-implications-for-periodic-health-examinations
#11
Paula C Charlton, Benjamin Raysmith, Martin Wollin, Simon Rice, Craig Purdam, Ross A Clark, Michael K Drew
OBJECTIVES: Determine whether clinically feasible tests of isometric lower limb strength and range of motion (ROM) in Australian Football (AF) athletes are useful in Periodic Health Examinations to identify persistent deficits following hamstring strain injury (HSI). DESIGN: Case-control. METHODS: Thirty-seven male, semi-professional AF athletes (mean±SD; age, 20.2±2.9years; height, 1.7±0.5m; mass, 81±9.2kg) participated, ten athletes (37%) reported HSI within the previous three seasons of competition...
April 3, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29650338/comparability-of-children-s-sedentary-time-estimates-derived-from-wrist-worn-geneactiv-and-hip-worn-actigraph-accelerometer-thresholds
#12
Lynne M Boddy, Robert J Noonan, Youngwon Kim, Alex V Rowlands, Greg J Welk, Zoe R Knowles, Stuart J Fairclough
OBJECTIVES: To examine the comparability of children's free-living sedentary time (ST) derived from raw acceleration thresholds for wrist mounted GENEActiv accelerometer data, with ST estimated using the waist mounted ActiGraph 100count·min-1 threshold. DESIGN: Secondary data analysis. METHOD: 108 10-11-year-old children (n=43 boys) from Liverpool, UK wore one ActiGraph GT3X+ and one GENEActiv accelerometer on their right hip and left wrist, respectively for seven days...
March 28, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29628407/posterior-circumflex-humeral-artery-pathology-and-digital-ischemia-in-elite-volleyball-symptoms-risk-factors-suggestions-for-clinical-management
#13
Daan van de Pol, P Paul F M Kuijer, Aart Terpstra, Marja Pannekoek-Hekman, Sena Alaeikhanehshir, Olivier Bouwmeester, R Nils Planken, Mario Maas
OBJECTIVES: To assess the association between posterior circumflex humeral artery (PCHA) pathology (PCHAP), symptoms and associated risk factors, in elite volleyball players, and to suggest profiles for clinical management and monitoring. DESIGN: Cross-sectional study. METHODS: A questionnaire assessed symptoms of digital ischemia (DI) in the dominant hand and risk factors among 278 elite indoor and beach volleyball players of whom 6.1% (17/278) was diagnosed with PCHAP using ultrasound...
March 28, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29610049/the-king-devick-test-is-a-valid-and-reliable-tool-for-assessing-sport-related-concussion-in-australian-football-a-prospective-cohort-study
#14
Mark Hecimovich, Doug King, Alasdair R Dempsey, Myles Murphy
OBJECTIVES: Sport-related concussion (SRC) research has focused on impaired oculomotor function. The King-Devick (K-D) test measures oculomotor performance and is reported to identify suboptimal brain function. The use of the K-D test in Australian football (AF), a sport involving body contact and tackling, has not been documented. Therefore, the objective of this study was to determine the test-retest reliability and diagnostic accuracy of the K-D test on a sub-elite AF team. DESIGN: Prospective cohort study METHODS: In total, 22 male players (19...
March 28, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29650339/a-force-profile-analysis-comparison-between-functional-data-analysis-statistical-parametric-mapping-and-statistical-non-parametric-mapping-in-on-water-single-sculling
#15
REVIEW
John Warmenhoven, Andrew Harrison, Mark A Robinson, Jos Vanrenterghem, Norma Bargary, Richard Smith, Stephen Cobley, Conny Draper, Cyril Donnelly, Todd Pataky
OBJECTIVES: To examine whether the Functional Data Analysis (FDA), Statistical Parametric Mapping (SPM) and Statistical non-Parametric Mapping (SnPM) hypothesis testing techniques differ in their ability to draw inferences in the context of a single, simple experimental design. DESIGN: The sample data used is cross-sectional (two-sample gender comparison) and evaluation of differences between statistical techniques used a combination of descriptive and qualitative assessments...
March 21, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29622491/the-influence-of-age-policy-changes-on-the-relative-age-effect-across-the-australian-rules-football-talent-pathway
#16
Jade A Z Haycraft, Stephanie Kovalchik, David B Pyne, Paul Larkin, Sam Robertson
OBJECTIVES: To identify the influence of age-policy changes on the relative age effect (RAE) across the Australian Football League (AFL) talent pathway. DESIGN: Retrospective cross-sectional analysis of junior AFL players attending the National Draft (National), State, and State Under 16s (U16) combines between 1999-2016. METHODS: Birth-date data was obtained for players attending the AFL State U16 (n=663, age: 15.9±0.4years), State (n=803, age: 19...
March 21, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29606559/the-magnitude-of-translational-and-rotational-head-accelerations-experienced-by-riders-during-downhill-mountain-biking
#17
Howard T Hurst, Stephen Atkins, Ben D Dickinson
OBJECTIVES: To determine the magnitude of translational and rotational head accelerations during downhill mountain biking. DESIGN: Observational study. METHODS: Sixteen male downhill cyclists (age 26.4±8.4years; stature 179.4±7.2cm; mass 75.3±5.9kg) were monitored during two rounds of the British Downhill Series. Riders performed two runs on each course wearing a triaxial accelerometer behind the right ear. The means of the two runs for each course were used to determine differences between courses for mean and maximum peak translational (g) and rotational accelerations (rad/s2 ) and impact duration for each course...
March 21, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29588115/dual-energy-x-ray-absorptiometry-positioning-protocols-in-assessing-body-composition-a-systematic-review-of-the-literature
#18
REVIEW
Flinn Shiel, Carl Persson, James Furness, Vini Simas, Rodney Pope, Mike Climstein, Wayne Hing, Ben Schram
OBJECTIVES: To systematically identify and assess methods and protocols used to reduce technical and biological errors in published studies that have investigated reliability of dual energy X-ray absorptiometry (DXA) for assessing body composition. DESIGN: Systematic review. METHODS: Systematic searches of five databases were used to identify studies of DXA reliability. Two independent reviewers used a modified critical appraisal tool to assess their methodological quality...
March 16, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29551273/rating-of-perceived-exertion-is-a-stable-and-appropriate-measure-of-workload-in-judo
#19
Sally J Bromley, Michael K Drew, Andrew McIntosh, Scott Talpey
OBJECTIVES: Heart rate (HR), blood lactate concentration [La] and/or rating of perceived exertion (RPE) have been utilised to monitor judo training load in technical and randori (competition training) sessions, but are yet to be investigated in mixed sessions containing both elements. Therefore the purpose of this study was to: (1) determine the stability of these variables, and (2) to assess the efficacy of RPE as a load variable for mixed judo sessions. DESIGN: Cross-sectional study...
March 15, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29580881/doping-risk-and-career-turning-points-in-male-elite-road-cycling-2005-2016
#20
Olivier Aubel, Brice Lefèvre, Jean-Marie Le Goff, Natascia Taverna
OBJECTIVES: Determine whether career paths of elite male professional riders explain the risk of being sanctioned for an Anti-Doping Rules Violation through the International Cycling Union. DESIGN, METHODS: A discrete-time logit model explored the link between career path and ADRV risk in a database of 10,551 riders engaged in the first three world divisions (2005-2016), including 271 sanctioned riders. RESULTS: Despite a longer career (7...
March 14, 2018: Journal of Science and Medicine in Sport
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