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Journal of Science and Medicine in Sport

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https://www.readbyqxmd.com/read/28258820/the-king-devick-k-d-test-and-concussion-diagnosis-in-semi-professional-rugby-union-players
#1
John H Molloy, Ian Murphy, Conor Gissane
OBJECTIVES: To determine the utility of the King-Devick (K-D) test in identifying sports-related concussion in semi-professional rugby players. DESIGN: Descriptive cohort study. METHODS: 176 male players were recruited from a semi-professional rugby union competition in New Zealand (NZ). Baseline K-D scores were obtained in the pre-season. Post-match K-D and Pitch Side Concussion Assessment Version 2 (PSCA2) scores were obtained in those with suspected concussion...
February 28, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28238619/application-of-the-rosetta-stone-to-understand-how-much-mvpa-preschoolers-accumulate-a-systematic-review
#2
REVIEW
Fabricio C P Ravagnani, Christianne F Coelho-Ravagnani, Keith Brazendale, Robert G Weaver, Daniel B Bornstein, Michael W Beets
OBJECTIVES: This study illustrates the utility of the Rosetta Stone equations for comparing estimates of preschool-age children's moderate-to-vigorous physical activity (MVPA) across studies utilizing different cutpoints. DESIGN: Systematic review. METHODS: A search of online databases was conducted to identify studies that reported daily minutes of MVPA in preschoolers using the cutpoints from which Rosetta Stone equations have been developed...
February 23, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28233675/trajectory-of-self-reported-pain-and-function-and-knee-extensor-muscle-strength-in-young-patients-undergoing-arthroscopic-surgery-for-meniscal-tears-a-systematic-review-and-meta-analysis
#3
REVIEW
Jonas Bloch Thorlund, Lasse Østengaard, Nathan Cardy, Fiona Wilson, Claus Jørgensen, Carsten Bogh Juhl
OBJECTIVES: To investigate the trajectory of patient reported pain and function and knee extensor muscle strength over time in young individuals undergoing arthroscopic meniscal surgery. DESIGN: Systematic review and meta-analysis METHODS: Six databases were searched up to October 13th, 2016. PATIENTS AND INTERVENTION: People aged 30 years or younger undergoing surgery for a meniscal tear. OUTCOMES: and comparator: (1) Self-reported pain and function in patients undergoing meniscal surgery compared to a non-operative control group (2)...
February 20, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28254143/the-near-infrared-spectroscopy-derived-deoxygenated-haemoglobin-breaking-point-is-a-repeatable-measure-that-demarcates-exercise-intensity-domains
#4
Danilo Iannetta, Ahmad Qahtani, Felipe Mattioni Maturana, Juan Manuel Murias
OBJECTIVES: A breaking-point in the near-infrared spectroscopy (NIRS)-derived deoxygenated haemoglobin ([HHb]) profile towards the end of a ramp incremental (RI) cycling test has been associated to the respiratory compensation point (RCP). Despite the physiological value of this measure, its repeatability remains unknown. The aim was to examine the repeatability of the [HHb] breaking-point ([HHb]BP) and its association to RCP during a RI cycling test. DESIGN: A repeated measures design was performed on 11 males (30...
February 18, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28238618/metabolic-demands-and-replenishment-of-muscle-glycogen-after-a-rugby-league-match-simulation-protocol
#5
Warren J Bradley, Marcus P Hannon, Victoria Benford, James C Morehen, Craig Twist, Sam Shepherd, Matthew Cocks, Samuel G Impey, Robert G Cooper, James P Morton, Graeme L Close
OBJECTIVES: The metabolic requirements of a rugby league match simulation protocol and the timing of carbohydrate provision on glycogen re-synthesis in damaged muscle were examined. DESIGN: Fifteen (mean±SD: age 20.9±2.9 year, body-mass 87.3±14.1kg, height 177.4±6.0cm) rugby league (RL) players consumed a 6gkgday-1 CHO diet for 7-days, completed a time to exhaustion test (TTE) and a glycogen depletion protocol on day-3, a RL simulated-match protocol (RLMSP) on day-5 and a TTE on day-7...
February 15, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28159535/wrist-worn-triaxial-accelerometry-predicts-the-energy-expenditure-of-non-vigorous-daily-physical-activities
#6
Worawan Sirichana, Brett A Dolezal, Eric V Neufeld, Xiaoyan Wang, Christopher B Cooper
OBJECTIVES: Triaxial accelerometry is commonly used to estimate oxygen uptake (VO2) and energy expenditure in health and fitness studies. We tested the correlation of a triaxial accelerometer in terms of a summation of vector magnitudes with gravity subtracted (SVMgs) and measured VO2 for different daily physical activities. DESIGN: Original research, cross-sectional. METHODS: Twenty volunteers wore a triaxial accelerometer on both wrists while performing 12 assigned daily physical activities for 6min for each activity...
January 25, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28302463/critical-power-testing-or-self-selected-cycling-which-one-is-the-best-predictor-of-maximal-metabolic-steady-state
#7
Felipe Mattioni Maturana, Daniel A Keir, Kaitlin M McLay, Juan M Murias
Critical power (CP) demarcates the boundary between heavy and very heavy exercise intensity domains, and therefore, the power output (PO) that can be sustained at the maximal metabolic steady-state during constant-PO exercise (i.e., maximal lactate steady-state (MLSS)). However, the estimated CP does not always reflect a sustainable intensity of exercise, where blood lactate concentration ([La]) and oxygen uptake (V˙O2) reach a plateau. OBJECTIVES: To test cyclists' ability to predict their highest PO associated with metabolic steady-state based on their own perception of effort...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28233674/asymmetry-during-preseason-functional-movement-screen-testing-is-associated-with-injury-during-a-junior-australian-football-season
#8
Samuel Chalmers, Joel T Fuller, Thomas A Debenedictis, Samuel Townsley, Matthew Lynagh, Cara Gleeson, Andrew Zacharia, Stuart Thomson, Mary Magarey
OBJECTIVES: The Functional Movement Screen (FMS) is a popular screening tool, however, the postulated relationship between prospective injury and FMS scoring remains sparsely explored in adolescent athletes. The aim of the study was to examine the association between pre-season FMS scores and injuries sustained during one regular season competition in elite adolescent Australian football players. DESIGN: Prospective cohort study. METHODS: 237 elite junior Australian football players completed FMS testing during the late pre-season phase and had their weekly playing status monitored during the regular season...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28214098/is-perceived-athlete-leadership-quality-related-to-team-effectiveness-a-comparison-of-three-professional-sports-teams
#9
Katrien Fransen, S Alexander Haslam, Clifford J Mallett, Niklas K Steffens, Kim Peters, Filip Boen
OBJECTIVES: Researchers have argued that leadership is one of the most important determinants of team effectiveness. The present study examined the extent to which the perceived quality of athlete leadership was related to the effectiveness of elite sports teams. DESIGN: Three professional football teams (N=135) participated in our study during the preparation phase for the Australian 2016 season. METHODS: Players and coaching staff were asked to assess players' leadership quality in four leadership roles (as task, motivational, social, and external leader) via an online survey...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28189462/concurrent-validity-and-cross-validation-of-the-brunel-lifestyle-physical-activity-questionnaire
#10
Massimo M Vencato, Costas I Karageorghis, David-Lee Priest, Alan M Nevill
OBJECTIVES: Given the profoundly negative impact of inactivity on public health, it is important to have valid and reliable measures of lifestyle physical activity (LPA). The Brunel Lifestyle Physical Activity Questionnaire (BLPAQ) was designed to measure planned physical activity (PPA) and unplanned physical activity (UPA). The objective of the present study was to assess the criterion-related validity of the BLPAQ. DESIGN: A correlational design was employed. METHODS: A sample of British leisure centre users (N=356; age range 18-69 y: mean age 26...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28189461/software-thresholds-alter-the-bias-of-actigraphy-for-monitoring-sleep-in-team-sport-athletes
#11
Kate L Fuller, Laura Juliff, Christopher J Gore, Jeremiah J Peiffer, Shona L Halson
OBJECTIVES: Actical(®) actigraphy is commonly used to monitor athlete sleep. The proprietary software, called Actiware(®), processes data with three different sleep-wake thresholds (Low, Medium or High), but there is no standardisation regarding their use. The purpose of this study was to examine validity and bias of the sleep-wake thresholds for processing Actical(®) sleep data in team sport athletes. DESIGN: Validation study comparing actigraph against accepted gold standard polysomnography (PSG)...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28185810/statins-for-primary-prevention-in-physically-active-individuals-do-the-risks-outweigh-the-benefits
#12
Ishak A Mansi, Jenny L English, Michael J Morris, Song Zhang, Eric M Mortensen, Ethan A Halm
OBJECTIVES: There are little data on the potential benefits and adverse events of statins among physically fit individuals. Our objective was to examine the associations of statin use with beneficial cardiovascular outcomes and adverse events in active duty military (a surrogate for high level of physical fitness). DESIGN: This is a retrospective propensity score-matched cohort study of healthy active duty military (fiscal years [FY] 2002-2011). METHODS: Statin-users received statins during FY 2005 as their only prescription medication...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28185807/specific-circulating-phospholipids-acylcarnitines-amino-acids-and-biogenic-amines-are-aerobic-exercise-markers
#13
Thomas K Felder, Susanne Ring-Dimitriou, Simon Auer, Selma M Soyal, Ludmilla Kedenko, Mark Rinnerthaler, Janne Cadamuro, Elisabeth Haschke-Becher, Elmar Aigner, Bernhard Paulweber, Wolfgang Patsch
OBJECTIVES: Regular aerobic exercise provides beneficial effects on human health and reduces all-cause mortality. Aerobic exercise has profound metabolic effects, and specific metabolites may reflect physiological changes. We aimed to identify endogenous metabolites that distinguish the trained from the untrained state to increase the spectrum of analytes amenable for hypothesis testing and to expand understanding of putative beneficial pathways. DESIGN: Cross sectional laboratory repeated measures study...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28185806/the-effect-of-acute-and-chronic-exercise-on-cognitive-function-and-academic-performance-in-adolescents-a-systematic-review
#14
REVIEW
Joanna W Li, Helen O'Connor, Nicholas O'Dwyer, Rhonda Orr
OBJECTIVES: To investigate whether exercise, proposed to enhance neuroplasticity and potentially cognitive function (CF) and academic performance (AP), may be beneficial during adolescence when important developmental changes occur. DESIGN: Systematic review evaluating the impact of acute or chronic exercise on CF and AP in adolescents (13-18 years). METHODS: Nine databases (AMED, AusportMed, CINAHL, COCHRANE, Embase, Medline, Scopus, SPORTdiscus, Web of Science) were searched from earliest records to 31st October 2016, using keywords related to exercise, CF, AP and adolescents...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28185805/comparison-of-energy-expenditure-and-heart-rate-responses-between-three-commercial-group-fitness-classes
#15
James B Wickham, Nicholas J Mullen, Douglas G Whyte, Jack Cannon
OBJECTIVES: The objectives of this study were to compare the energy expenditure and heart rate responses between three commercial group fitness classes (group resistance exercise [PUMP]; indoor stationary cycling [RIDE]; and step aerobics [STEP]). DESIGN: One-Way Repeated Measures incorporating a Latin Square Design for class randomisation. METHODS: Ten participants (5 males and 5 females) completed each group fitness class in random order with energy expenditure and heart rate determined using an Actiheart monitor...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28173971/the-acceleration-and-deceleration-profiles-of-elite-female-soccer-players-during-competitive-matches
#16
Jocelyn K Mara, Kevin G Thompson, Kate L Pumpa, Stuart Morgan
OBJECTIVES: The aim of this study was to determine the acceleration (≥2ms(-2)) and deceleration (≤-2ms(-2)) profiles of elite female soccer players during competitive matches. DESIGN: Single cohort, observational study. METHODS: An Optical Player Tracking system was used to determine acceleration (≥2ms(-2)) and deceleration (≤-2ms(-2)) variables for twelve elite female players across seven competitive matches. RESULTS: In total, players performed 423 (±126) accelerations and 430 (±125) decelerations per match...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28173970/a-comparison-of-catastrophic-injury-incidence-rates-by-provincial-rugby-union-in-south-africa
#17
Marelise Badenhorst, Evert A L M Verhagen, Willem van Mechelen, Michael I Lambert, Wayne Viljoen, Clint Readhead, Gail Baerecke, James C Brown
OBJECTIVES: To compare catastrophic injury rates between the 14 South African Provincial Rugby Unions. DESIGN: A prospective, population-based study conducted among all South African Unions between 2008-2014. METHODS: Player numbers in each Union were obtained from South African Rugby's 2013 Census. Catastrophic injuries were analysed from BokSmart's serious injury database. Incidence rates with 95% Confidence Intervals were calculated. Catastrophic injuries (Acute Spinal Cord Injuries and catastrophic Traumatic Brain Injuries) within Unions were compared statistically, using a Poisson regression with Incidence Rate Ratios (IRR) and a 95% confidence level (p<0...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28169154/motor-competence-and-characteristics-within-the-preschool-environment
#18
Larissa True, Karin Allor Pfeiffer, Marsha Dowda, Harriet G Williams, William H Brown, Jennifer R O'Neill, Russell R Pate
OBJECTIVES: Environmental characteristics within preschools that influence children's motor competence are largely unknown. The purpose of the present study was to examine the contribution of various preschool environmental characteristics to children's locomotor, object control, and total gross motor scores. DESIGN: Cross-sectional, observational study of 3-5 year-old children (n=229) from 22 preschools in South Carolina. METHODS: The Children's Activity and Movement in Preschool Study (CHAMPS) Motor Skills Protocol assessed MC...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28169153/effects-of-light-load-maximal-lifting-velocity-weight-training-vs-combined-weight-training-and-plyometrics-on-sprint-vertical-jump-and-strength-performance-in-adult-soccer-players
#19
David Rodríguez-Rosell, Julio Torres-Torrelo, Felipe Franco-Márquez, José Manuel González-Suárez, Juan José González-Badillo
OBJECTIVES: The purpose of this study was to compare the effects of combined light-load maximal lifting velocity weight training (WT) and plyometric training (PT) with WT alone on strength, jump and sprint performance in semiprofessional soccer players. DESIGN: Experimental, pre-post tests measures. METHODS: Thirty adult soccer players were randomly assigned into three groups: WT alone (FSG, n=10), WT combined to jump and sprint exercises (COM, n=10) and control group (CG, n=10)...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28169152/sleep-patterns-and-match-performance-in-elite-australian-basketball-athletes
#20
Craig Staunton, Brett Gordon, Edhem Custovic, Jonathan Stanger, Michael Kingsley
OBJECTIVES: To assess sleep patterns and associations between sleep and match performance in elite Australian female basketball players. DESIGN: Prospective cohort study. METHODS: Seventeen elite female basketball players were monitored across two consecutive in-season competitions (30 weeks). Total sleep time and sleep efficiency were determined using triaxial accelerometers for Baseline, Pre-match, Match-day and Post-match timings. Match performance was determined using the basketball efficiency statistic (EFF)...
January 24, 2017: Journal of Science and Medicine in Sport
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