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Journal of Science and Medicine in Sport

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https://www.readbyqxmd.com/read/28159535/wrist-worn-triaxial-accelerometry-predicts-the-energy-expenditure-of-non-vigorous-daily-physical-activities
#1
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/28214098/is-perceived-athlete-leadership-quality-related-to-team-effectiveness-a-comparison-of-three-professional-sports-teams
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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
https://www.readbyqxmd.com/read/28169151/value-of-quantitative-mri-parameters-in-predicting-and-evaluating-clinical-outcome-in-conservatively-treated-patients-with-chronic-midportion-achilles-tendinopathy-a-prospective-study
#14
J Tsehaie, D H J Poot, E H G Oei, J A N Verhaar, R J de Vos
OBJECTIVES: To evaluate whether baseline MRI parameters provide prognostic value for clinical outcome, and to study correlation between MRI parameters and clinical outcome. DESIGN: Observational prospective cohort study. METHODS: Patients with chronic midportion Achilles tendinopathy were included and performed a 16-week eccentric calf-muscle exercise program. Outcome measurements were the validated Victorian Institute of Sports Assessment-Achilles (VISA-A) questionnaire and MRI parameters at baseline and after 24 weeks...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28169150/no-relationship-exists-between-urinary-nt-probnp-and-gps-technology-in-professional-rugby-union
#15
Angus Lindsay, John G Lewis, Nicholas Gill, Nick Draper, Steven P Gieseg
OBJECTIVES: We investigated the level of cardiovascular stress associated with professional rugby union and whether these changes could be explained through external workload systems like GPS and video analysis. DESIGN: Urine samples (14 in game one and 13 in game two) were collected from professional rugby players before, immediately post- and 36h post-play in two consecutive games. METHODS: Urine was analysed for NT-proBNP by ELISA. Comparison with GPS (player-load and distance covered at specific speed bands) and video analysis (total impacts) were conducted...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28169148/risk-factors-that-predict-severe-injuries-in-university-rugby-sevens-players
#16
Rezvan Mirsafaei Rizi, Simon S Yeung, Nathan J Stewart, Ella W Yeung
OBJECTIVES: To investigate injury incidence and the influence of physical fitness parameters on the risk of severe injuries in players on rugby sevens university teams. DESIGN: Prospective cohort study. METHODS: Rugby players from three universities (N=104; 90M:14F; 20.6±1.9years) were recruited before the beginning of the season. Players underwent pre-season assessments of power, strength, speed, agility, endurance, stability, and flexibility...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28169147/single-task-and-dual-task-tandem-gait-test-performance-after-concussion
#17
David R Howell, Louis R Osternig, Li-Shan Chou
OBJECTIVES: To compare single-task and dual-task tandem gait test performance between athletes after concussion with controls on observer-timed, spatio-temporal, and center-of-mass (COM) balance control measurements. DESIGN: Ten participants (19.0±5.5years) were prospectively identified and completed a tandem gait test protocol within 72h of concussion and again 1 week, 2 weeks, 1 month, and 2 months post-injury. Seven uninjured controls (20.0±4.5years) completed the same protocol in similar time increments...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28162914/carrying-loads-validating-a-portable-tri-axial-accelerometer-during-frequent-and-brief-physical-activity
#18
G Zorrilla-Revilla, A Mateos, O Prado-Nóvoa, M Vidal-Cordasco, J Rodríguez
OBJECTIVES: The aim of this study is to evaluate the validity of the SenseWear Armband™ (SWA, Model MF-SW, BodyMedia Inc.) as a tool to assess daily brief, light- to moderate-intensity activities. DESIGN: A total of 41 volunteers were recruited (27 males, 14 females) to perform several trials, including a resting metabolic rate test and a number of walking trials while carrying different loads in a backpack. METHODS: Energy expenditure during trials was measured using both the SWA™ mini device, with the indirect calorimetry method (MasterScreen CPX and Oxycon Mobile JAEGER™ devices) used for validated comparative measurement...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28162913/coach-led-preventive-training-program-in-youth-soccer-players-improves-movement-technique
#19
J Luke Pryor, Hayley J Root, Lesley W Vandermark, Riana R Pryor, Jessica C Martinez, Thomas H Trojian, Craig R Denegar, Lindsay J DiStefano
: Long-term implementation of preventive training programs (PTP) in youth sport requires coach involvement. However, the optimal training of coaches to effectively implement a PTP remains unknown. It is also unknown if the benefits of PTP can be enhanced with multiple sport seasons of exposure. OBJECTIVES: To evaluate the influence of prior PTP exposure on movement technique in youth soccer players after completing a coach-led PTP. DESIGN: Cluster-randomized controlled trial...
January 24, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28153608/the-effect-of-intermittent-lower-limb-occlusion-on-recovery-following-exercise-induced-muscle-damage-a-randomized-controlled-trial
#20
Will Page, Rachael Swan, Stephen D Patterson
OBJECTIVES: The purpose of this investigation was to examine the effectiveness of intermittent lower limb occlusion in augmenting recovery from exercise induced muscle damage (EIMD) in physically active males. DESIGN: Randomized controlled trial, double blind. METHODS: Sixteen healthy recreationally active male participants were randomly assigned to an intermittent occlusion (OCC; n=8) or control (SHAM; n=8) group. The EIMD protocol comprised of 100 drop-jumps, from a 0...
January 24, 2017: Journal of Science and Medicine in Sport
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