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Journal of Science and Medicine in Sport

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https://www.readbyqxmd.com/read/28716692/the-fatigue-of-a-full-body-resistance-exercise-session-in-trained-men
#1
Paul W M Marshall, Rebecca Cross, Michael Haynes
OBJECTIVES: We examined the fatigue and recovery for 48h following a full-body resistance exercise session in trained men. DESIGN: Experimental cross-sectional study. METHODS: Eight resistance trained men volunteered to participate (mean±SD; age 27.0±6.0 years, height 1.79±0.05m, weight 81.8±6.8kg, training experience 7.8±5.0 years). Fatigue and pain was measured before, after, 1h post, 24h and 48h post the full-body resistance exercise session, which was based on in-season models used in contact team sports (e...
July 4, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28716691/acute-injuries-in-finnish-junior-floorball-league-players
#2
Kati Pasanen, Jussi Hietamo, Tommi Vasankari, Pekka Kannus, Ari Heinonen, Urho M Kujala, Ville M Mattila, Jari Parkkari
OBJECTIVES: To investigate the incidence and characteristics of acute time-loss injuries in Finnish junior floorball league players. DESIGN: Prospective cohort study with 3-year follow-up. METHODS: One hundred and eighty-six female and male players (mean age 16.6±1.4) took part in the follow-up study (2011-2014). The training hours and games were recorded on a team diary. Floorball related acute injuries were registered and verified by a research physician...
July 4, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28716690/does-player-time-in-game-affect-tackle-technique-in-elite-level-rugby-union
#3
Gregory J Tierney, Karl Denvir, Garreth Farrell, Ciaran K Simms
OBJECTIVES: It has been hypothesised that fatigue may be a major factor in tackle-related injury risk in rugby union and hence more injuries occur in the later stages of a game. The aim of this study is to identify changes in ball carrier or tackler proficiency characteristics, using elite level match video data, as player time-in-game increases. DESIGN: Qualitative observational cohort study. METHODS: Three 2014/15 European Rugby Champions Cup games were selected for ball carrier and tackler proficiency analysis...
July 4, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28689678/exercise-intensity-dependent-alterations-in-plasma-redox-status-do-not-reflect-skeletal-muscle-redox-sensitive-protein-signaling
#4
Lewan Parker, Adam Trewin, Itamar Levinger, Christopher S Shaw, Nigel K Stepto
OBJECTIVES: Redox homeostasis and redox-sensitive protein signaling play a role in exercise-induced adaptation. The effects of sprint-interval exercise (SIE), high-intensity interval exercise (HIIE) and continuous moderate-intensity exercise (CMIE), on post-exercise plasma redox status are unclear. Furthermore, whether post-exercise plasma redox status reflects skeletal muscle redox-sensitive protein signaling is unknown. DESIGN: In a randomized crossover design, eight healthy adults performed a cycling session of HIIE (5×4min at 75% Wmax), SIE (4×30s Wingate's), and CMIE work-matched to HIIE (30min at 50% of Wmax)...
July 1, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28705436/non-metric-multidimensional-performance-indicator-scaling-reveals-seasonal-and-team-dissimilarity-within-the-national-rugby-league
#5
Carl T Woods, Sam Robertson, Wade H Sinclair, Neil French Collier
OBJECTIVES: Analysing the dissimilarity of seasonal and team profiles within elite sport may reveal the evolutionary dynamics of game-play, while highlighting the similarity of individual team profiles. This study analysed seasonal and team dissimilarity within the National Rugby League (NRL) between the 2005 to 2016 seasons. DESIGN: Longitudinal. METHODS: Total seasonal values for 15 performance indicators were collected for every NRL team over the analysed period (n=190 observations)...
June 22, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28689677/walking-with-blood-flow-restriction-could-it-help-the-elderly-to-get-more-out-of-every-step
#6
LETTER
Takashi Abe, Jeremy P Loenneke
No abstract text is available yet for this article.
June 21, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28669665/the-fadir-test-accuracy-for-screening-cam-and-pincer-morphology-in-youth-ice-hockey-players
#7
Nicola C Casartelli, Romana Brunner, Nicola A Maffiuletti, Mario Bizzini, Michael Leunig, Christian W Pfirrmann, Reto Sutter
OBJECTIVES: Aim of this study was to evaluate the flexion-adduction-internal rotation (FADIR) test accuracy for screening cam and pincer morphology in youth male ice hockey players without diagnosed hip disorders. DESIGN: Cross-sectional study. METHODS: Seventy-four ice hockey players with a mean age of 16 years (range: 13-20 years) were assessed unilaterally. The presence of cam and pincer morphology was evaluated using the FADIR test and magnetic resonance imaging (MRI) (reference standard)...
June 21, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28666769/ten-genetic-polymorphisms-associated-with-power-athlete-status-a-meta-analysis
#8
REVIEW
Jan Weyerstraß, Kelly Stewart, Anke Wesselius, Maurice Zeegers
OBJECTIVES: In this study the association between genetic polymorphisms and power athlete status with possible interference by race and sex was investigated to identify genetic variants favourable for becoming a power athlete. DESIGN: This meta-analysis included both, case-control and Cohort studies. METHODS: Databases of PubMed and Web of Science were searched for studies reporting on genetic polymorphisms associated with the status of being a power athlete...
June 21, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28663137/online-news-media-reporting-of-football-related-fatalities-in-australia-a-matter-of-life-and-death
#9
Lauren V Fortington, Sheree Bekker, Caroline F Finch
OBJECTIVES: While deaths in sports settings are rare, they do occur. To develop an understanding of the sports and people most at risk, and to identify opportunities for prevention, routine and systematic data detailing the occurrence of these fatalities is required. There is currently no routine reporting of data of this nature in Australia. As there is often strong community interest in these incidents, the media offers an opportunity for surveillance. However before this can occur, understanding of the terminology used by the media is required...
June 21, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28663135/use-of-a-tibial-accelerometer-to-measure-ground-reaction-force-in-running-a-reliability-and-validity-comparison-with-force-plates
#10
Damian P Raper, Jeremy Witchalls, Elissa J Philips, Emma Knight, Michael K Drew, Gordon Waddington
OBJECTIVES: The use of microsensor technologies to conduct research and implement interventions in sports and exercise medicine has increased recently. The objective of this paper was to determine the validity and reliability of the ViPerform as a measure of load compared to vertical ground reaction force (GRF) as measured by force plates. DESIGN: Absolute reliability assessment, with concurrent validity. METHODS: 10 professional triathletes ran 10 trials over force plates with the ViPerform mounted on the mid portion of the medial tibia...
June 16, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28625540/effects-of-breaking-up-sitting-on-adolescents-postprandial-glucose-after-consuming-meals-varying-in-energy-a-cross-over-randomised-trial
#11
Elly A Fletcher, Jo Salmon, Sarah A McNaughton, Liliana Orellana, Glenn D Wadley, Clinton Bruce, Paddy C Dempsey, Kathleen E Lacy, David W Dunstan
OBJECTIVES: To explore the impact of uninterrupted sitting versus sitting with resistance-type activity breaks on adolescents' postprandial glucose responses while consuming a diet varying in energy. DESIGN: Cross-over randomised trial. METHODS: Thirteen healthy participants (16.4±1.3years) completed a four-treatment cross-over trial: (1) uninterrupted sitting+high-energy diet; (2) sitting with breaks+high-energy diet; (3) uninterrupted sitting+standard-energy diet; and (4) sitting with breaks+standard-energy diet...
June 9, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28647284/the-effects-of-high-intensity-interval-training-on-muscle-size-and-quality-in-overweight-and-obese-adults
#12
Malia N M Blue, Abbie E Smith-Ryan, Eric T Trexler, Katie R Hirsch
OBJECTIVES: Despite growing popularity of high intensity interval training (HIIT) for improving health and fitness, limited data exist identifying the effects of HIIT on muscle characteristics. The purpose of the current study was to investigate the effects of a 3-week HIIT intervention on muscle size and quality in overweight and obese men and women. DESIGN: Randomized controlled trial. METHODS: Forty-four overweight and obese men and women (mean±SD; age: 35...
June 8, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28645497/an-association-between-polymorphisms-within-the-apoe-gene-and-concussion-aetiology-in-rugby-union-players
#13
Shameemah Abrahams, Sarah Mc Fie, Jon Patricios, Jason Suter, Michael Posthumus, Alison V September
OBJECTIVES: Concussion refers to changes in neurological function due to biomechanical forces transmitted to the head. The APOE ε4 allele is associated with brain injury severity. The objective was to determine if APOE gene variants are associated with concussion history and severity in rugby players. DESIGN: In total, 128 non-concussed controls and 160 previously concussed participants (all cases N=160; diagnosed N=139) were recruited from high school (junior, N=121), club (N=116) and professional rugby teams (N=51)...
June 8, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28645496/determining-the-best-percent-predicted-equation-for-estimated-vo2-peak-by-a-1-km-moderate-perceptually-regulated-treadmill-walk-to-predict-mortality-in-outpatients-with-cardiovascular-disease
#14
Giovanni Grazzi, Gianni Mazzoni, Jonathan Myers, Luciano Codecà, Giovanni Pasanisi, Simona Mandini, Massimo Piepoli, Stefano Volpato, Francesco Conconi, Giorgio Chiaranda
OBJECTIVES: To determine the prognostic ability of established percent-predicted equations of peak oxygen consumption (%PRED) estimated by a moderate submaximal walking test in a large cohort of outpatients with cardiovascular disease (CVD). DESIGN: Population-based prospective study. METHODS: A total of 1442 male patients aged 25-85 years at baseline, underwent a moderate perceptually-regulated (11-13 on the 6-20 Borg scale) treadmill walk (1k-TWT) for peak oxygen consumption estimation (VO2 peak)...
June 8, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28645495/validity-and-reliability-of-the-mytemp-ingestible-temperature-capsule
#15
Coen C W G Bongers, Maria T E Hopman, Thijs M H Eijsvogels
OBJECTIVES: An accurate and non-invasive measurement of core body temperature (Tc) is of great importance to quantify exercise-induced increases in Tc in athletes or to assess changes in Tc in patient populations. The use of ingestible gastrointestinal telemetric temperature capsules is widely accepted as a surrogate marker for Tc, but widespread implementation is lacking due to the high costs of these disposable capsules. A new and cheaper temperature capsule system (i.e. myTemp) was recently introduced...
June 8, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28641863/a-comparison-of-different-heat-maintenance-methods-implemented-during-a-simulated-half-time-period-in-professional-rugby-union-players
#16
Mark Russell, Reuben Tucker, Christian J Cook, Thibault Giroud, Liam P Kilduff
OBJECTIVES: In thermoneutral conditions, half-time is associated with reductions in body temperature that acutely impair performance. This laboratory-based study compared active, passive, and combined methods of half-time heat maintenance. DESIGN: Randomised, counterbalanced, cross-over. METHODS: After a standardised warm-up (WU) and 15min of rest, professional Rugby Union players (n=20) completed a repeated sprint test (RSSA1). Throughout a simulated half-time (temperature: 20...
June 8, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28629667/interchange-rotation-factors-and-player-characteristics-influence-physical-and-technical-performance-in-professional-australian-rules-football
#17
Patrick A Dillon, Thomas Kempton, Samuel Ryan, Joel Hocking, Aaron J Coutts
OBJECTIVES: To examine the effects of match-related and individual player characteristics on activity profile and technical performance during rotations in professional Australian football. DESIGN: Longitudinal observational study. METHODS: Global positioning system data and player rating scores were collected from 33 professional Australian football players during 15 Australian football League matches. Player rating scores were time aligned with their relative total and high-speed running (HSR) distance (>20kmh(-1)) for each on ground rotation...
June 8, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28625539/investigating-the-effects-of-maximal-anaerobic-fatigue-on-dynamic-postural-control-using-the-y-balance-test
#18
William Johnston, Kara Dolan, Niamh Reid, Garrett F Coughlan, Brian Caulfield
OBJECTIVES: The Y Balance Test is one of the most commonly used dynamic balance assessments, providing an insight into the integration of the sensorimotor subsystems. In recent times, there has been an increase in interest surrounding it's use in various clinical populations demonstrating alterations in motor function. Therefore, it is important to examine the effect physiological influences such as fatigue play in dynamic postural control, and establish a timeframe for its recovery. DESIGN: Descriptive laboratory study...
June 8, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28663136/can-salivary-testosterone-and-cortisol-reactivity-to-a-mid-week-stress-test-discriminate-a-match-outcome-during-international-rugby-union-competition
#19
Blair T Crewther, Neil Potts, Liam P Kilduff, Scott Drawer, Christian J Cook
OBJECTIVES: Evidence suggests that stress-induced changes in testosterone and cortisol are related to future competitive behaviours and team-sport outcomes. Therefore, we examined whether salivary testosterone and cortisol reactivity to a mid-week stress test can discriminate a match outcome in international rugby union competition. DESIGN: Single group, quasi-experimental design with repeated measures. METHOD: Thirty-three male rugby players completed a standardised stress test three or four days before seven international matches...
June 2, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28622975/implicit-versus-explicit-attitude-to-doping-which-better-predicts-athletes-vigilance-towards-unintentional-doping
#20
Derwin King Chung Chan, David A Keatley, Tracy C W Tang, James A Dimmock, Martin S Hagger
OBJECTIVES: This preliminary study examined whether implicit doping attitude, explicit doping attitude, or both, predicted athletes' vigilance towards unintentional doping. DESIGN: A cross-sectional correlational design. METHODS: Australian athletes (N=143;Mage=18.13, SD=4.63) completed measures of implicit doping attitude (brief single-category implicit association test), explicit doping attitude (Performance Enhancement Attitude Scale), avoidance of unintentional doping (Self-Reported Treatment Adherence Scale), and behavioural vigilance task of unintentional doping (reading the ingredients of an unfamiliar food product)...
June 2, 2017: Journal of Science and Medicine in Sport
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