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https://www.readbyqxmd.com/read/28195980/importance-reliability-and-usefulness-of-acceleration-measures-in-team-sports
#1
Jace A Delaney, Cloe J Cummins, Heidi R Thornton, Grant M Duthie
The ability to accelerate, decelerate and change direction efficiently is imperative to successful team-sports performance. Traditional intensity-based thresholds for acceleration and deceleration may be inappropriate for time-series data, and have been shown to exhibit poor reliability, suggesting other techniques may be preferable. This study assessed movement data from one professional rugby league team throughout two full seasons and one pre-season period. Using both 5 Hz and 10 Hz global positioning systems (GPS) units, a range of acceleration-based variables were evaluated for their inter-unit reliability, ability to discriminate between positions, and associations with perceived muscle soreness...
February 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28167878/commercial-separation-systems-designed-for-preparation-of-platelet-rich-plasma-yield-differences-in-cellular-composition
#2
Ryan M Degen, Johnathan A Bernard, Kristin S Oliver, Joshua S Dines
BACKGROUND: The role of platelet-rich plasma (PRP) in the treatment of sport-related injuries is unclear, largely due to the heterogeneity of clinical results. This may relate to compositional differences in PRP from different separation systems. QUESTIONS/PURPOSES: This study aims to compare the composition of PRP produced with five different commercially available systems, focusing on cellular concentrations and pH. METHODS: Seven donors (41 ± 12 years) provided blood for PRP preparation using five systems (Arthrex Angel, Emcyte Genesis CS, Arteriocyte Magellan, Harvest SmartPrep, and Biomet GPS III)...
February 2017: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
https://www.readbyqxmd.com/read/28155786/-general-practitioners-and-physical-activity-counselling-from-evidence-to-practice-contingencies
#3
Géraldine Bloy, Laetitia Moussard Philippon, Laurent Rigal
<ce:para>Introduction: One half of the French population has an insufficient level of physical activity. General Practitioners are consi-dered to be well-placed to promote physical activity. This article analyses how they address this issue.</ce:para> <ce:para>Methods: Semi-structured interviews were conducted on preventive care with 99 GPs from the Parisian area. Their approach to physical activity counselling was discussed in greater detail with 20 GPs. The analysis identified the diverse rationales and approaches of GPs in a grounded theory perspective...
June 8, 2016: Santé Publique: Revue Multidisciplinaire Pour la Recherche et L'action
https://www.readbyqxmd.com/read/28149425/the-integration-of-internal-and-external-training-load-metrics-in-hurling
#4
Shane Malone, Dominic Doran, Ibrahim Akubat, Kieran Collins
The current study aimed to assess the relationship between the hurling player's fitness profile and integrated training load (TL) metrics. Twenty-five hurling players performed treadmill testing for VO2max, the speed at blood lactate concentrations of 2 mmol•L-1 (vLT) and 4 mmol•L-1 (vOBLA) and the heart rate-blood lactate profile for calculation of individual training impulse (iTRIMP). The total distance (TD; m), high speed distance (HSD; m) and sprint distance (SD; m) covered were measured using GPS technology (4-Hz, VX Sport, Lower Hutt, New Zealand) which allowed for the measurement of the external TL...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28051343/methodological-considerations-when-quantifying-high-intensity-efforts-in-team-sport-using-global-positioning-system-technology
#5
Matthew C Varley, Arne Jaspers, Werner F Helsen, James J Malone
Purpose Sprints and accelerations are popular performance indicators in applied sport. The methods used to define these efforts using athlete tracking technology could affect the number of efforts reported. The study aimed to determine the influence of different techniques and settings for detecting high-intensity efforts using Global Positioning System (GPS) data. Methods Velocity and acceleration data of a professional soccer match was recorded via 10-Hz GPS. Velocity data was filtered using either a median or exponential filter...
January 4, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28039429/limited-potential-of-genetic-predisposition-scores-to-predict-muscle-mass-and-strength-performance-in-flemish-caucasians-between-19-73-years-of-age
#6
Ruben Charlier, Maarten Caspers, Sara Knaeps, Evelien Mertens, Diether Lambrechts, Johan Lefevre, Martine Thomis
Since both muscle mass and strength performance are polygenic in nature, the current study compared four Genetic Predisposition Scores (GPS) in their ability to predict these phenotypes. Data were gathered within the framework of the first generation Flemish Policy Research Centre 'Sport, Physical Activity and Health' (2002-2004). Results are based on muscle characteristics data of 565 Flemish Caucasians (19-73 yr, 365 men). Skeletal muscle mass (SMM) was determined using bioelectrical impedance. The Biodex dynamometer was used to measure isometric (PTstatic120°) and isokinetic strength (PTdynamic60° and PTdynamic240°), ballistic movement speed (S20%) and muscular endurance (Work) of the knee extensors...
December 30, 2016: Physiological Genomics
https://www.readbyqxmd.com/read/28028894/attacking-22-entries-in-rugby-union-running-demands-and-differences-between-successful-and-unsuccessful-entries
#7
P Tierney, D P Tobin, C Blake, E Delahunt
Global Positioning System (GPS) technology is commonly utilized in team sports, including rugby union. It has been used to describe the average running demands of rugby union. This has afforded an enhanced understanding of the physical fitness requirements for players. However, research in team sports has suggested that training players relative to average demands may underprepare them for certain scenarios within the game. To date, no research has investigated the running demands of attacking 22 entries in rugby union...
December 28, 2016: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/27806014/a-performance-analysis-of-a-stand-up-paddle-board-marathon-race
#8
AProf Ben Schram, Prof Wayne Hing, AProf Mike Climstein, AProf James Furness
Stand up paddle boarding (SUP) is a rapidly growing sport and recreational activity in which little scientific research exists. A review of the literature failed to identify a single article pertaining to the physiological demands of SUP competition. The purpose of this study was to conduct a performance analysis of a national level SUP marathon race. Ten elite SUP athletes (6 male, 4 female) were recruited from the Stand Up Paddle Surfing Association of Australia to have their race performance in the Australian Titles analyzed...
October 28, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27736244/unpacking-the-black-box-applications-and-considerations-for-using-gps-devices-in-sport
#9
James J Malone, Ric Lovell, Matthew C Varley, Aaron J Coutts
Athlete tracking devices that include global positioning system (GPS) and micro electrical mechanical system (MEMS) components are now commonplace in sport research and practice. These devices provide large amounts of data that are used to inform decision-making on athlete training and performance. However, the data obtained from these devices are often provided without clear explanation of how these metrics are obtained. At present, there is no clear consensus regarding how these data should be handled and reported in a sport context...
October 13, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27618472/impact-of-fatigue-on-positional-movements-during-professional-rugby-union-match-play
#10
Jason C Tee, Mike I Lambert, Yoga Coopoo
PURPOSE: In team sports, fatigue is manifested by a self-regulated decrease in movement distance and intensity. There is currently limited information on the effect of fatigue on movement patterns in rugby union match play, particularly for players in different position groups (backs vs. forwards). This study investigated the effect of different match periods on movement patterns of professional rugby union players. METHODS: Global positioning system (GPS) data were collected from 46 professional match participations to determine temporal effects on movement patterns...
September 6, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27467516/physical-and-physiological-demands-of-experienced-male-basketball-players-during-a-competitive-game
#11
Carlos Puente, Javier Abián-Vicén, Francisco Areces, Roberto López, Juan Del Coso
The aim of this investigation was to analyze the physical and physiological demands of experienced basketball players during a real and competitive game. Twenty-five well-trained basketball players (8 guards, 8 forwards, 9 centers) played a competitive game on an outdoor court. Instantaneous running speeds, the number of body-impacts above 5-g as well as the number of accelerations and decelerations were assessed by means of a 15 Hz GPS accelerometer unit. Individual heart rate was also recorded using heart rate monitors...
July 26, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27194668/relationships-between-internal-and-external-training-load-in-team-sport-athletes-evidence-for-an-individualised-approach
#12
Jonathan D Bartlett, Fergus O'Connor, Nathan Pitchford, Lorena Torres-Ronda, Samuel J Robertson
Purpose The aim of this study was to quantify and predict relationships between RPE and GPS training load variables in professional Australian Football (AF) players using group and individualised modelling approaches. Methods Training load data (GPS and RPE) for 41 professional AF players was obtained over a period of 27 weeks. A total of 2711 training observations were analysed with a total of 66 ±13 sessions per player (range; 39 to 89). Separate generalised estimating equations (GEE) and artificial neural network analyses (ANN) were conducted to determine the ability to predict RPE from training load variables (i...
August 24, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27191694/the-running-performance-profile-of-elite-gaelic-football-match-play
#13
Shane Malone, Barry Solan, Kieran Collins
: Malone, S, Solan, B, and Collins, K. TITLE: The running performance profile of elite Gaelic football match-play. J Strength Cond Res 31(1): 30-36, 2017-The current study examined (a) the match running performance of Gaelic football and (b) the decrement in match running performance with respect to position. Global positioning satellite system technologies (4-Hz; VX Sport) were used with 3 elite intercounty teams across 3 full seasons with 250 full game data sets collected...
January 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27071364/-the-revised-dutch-college-of-general-practitioners-nhg-practice-guideline-on-visual-symptoms
#14
Wietze E Eizenga, Geert H Blom, Tjerk Wiersma
The 2001 NHG practice guideline on 'Refraction disorders' was revised for the second time in October 2015. The title has been changed to 'Visual symptoms', since besides refraction disorders other conditions such as glaucoma, macular degeneration, cataract and acute eye symptoms are also covered. The ophthalmologist is the specialist to whom GPs refer patients most often. Apart from the GP, ophthalmologist and youth health care physician, various other allied health professions are involved in eye healthcare...
2016: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/27050247/performance-analysis-of-surfing-a-review
#15
Oliver R L Farley, Chris R Abbiss, Jeremy M Sheppard
Farley, ORL, Abbiss, CR, and Sheppard, JM. Performance Analysis of Surfing: A Review. J Strength Cond Res 31(1): 260-271, 2017-Despite the increased professionalism and substantial growth of surfing worldwide, there is limited information available to practitioners and coaches in terms of key performance analytics that are common in other field-based sports. Indeed, research analyzing surfing performance is limited to a few studies examining male surfers' heart rates, surfing activities through time-motion analysis (TMA) using video recordings and Global Positioning Satellite (GPS) data during competition and recreational surfing...
January 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27026887/sports-teams-as-complex-adaptive-systems-manipulating-player-numbers-shapes-behaviours-during-football-small-sided-games
#16
Pedro Silva, Luís Vilar, Keith Davids, Duarte Araújo, Júlio Garganta
Small-sided and conditioned games (SSCGs) in sport have been modelled as complex adaptive systems. Research has shown that the relative space per player (RSP) formulated in SSCGs can impact on emergent tactical behaviours. In this study we adopted a systems orientation to analyse how different RSP values, obtained through manipulations of player numbers, influenced four measures of interpersonal coordination observed during performance in SSCGs. For this purpose we calculated positional data (GPS 15 Hz) from ten U-15 football players performing in three SSCGs varying in player numbers (3v3, 4v4 and 5v5)...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27002795/the-relationship-between-whole-body-external-loading-and-body-worn-accelerometry-during-team-sport-movements
#17
Niels J Nedergaard, Mark A Robinson, Elena Eusterwiemann, Barry Drust, Paulo J Lisboa, Jos Vanrenterghem
PURPOSE: To investigate the relationship between whole-body accelerations and body-worn accelerometry during team-sport movements. METHODS: Twenty male team-sport players performed forward running and anticipated 45° and 90° side-cuts at approach speeds of 2, 3, 4, and 5 m/s. Whole-body center-of-mass (CoM) accelerations were determined from ground-reaction forces collected from 1 foot-ground contact, and segmental accelerations were measured from a commercial GPS accelerometer unit on the upper trunk...
January 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27000056/spatial-physical-activity-patterns-among-primary-school-children-living-in-neighbourhoods-of-varying-socioeconomic-status-a-cross-sectional-study-using-accelerometry-and-global-positioning-system
#18
Rahel Bürgi, Laura Tomatis, Kurt Murer, Eling D de Bruin
BACKGROUND: Neighbourhood socioeconomic status (SES) has been shown to be related to health status and overweight independent of individual SES. However, results about the association between neighbourhood SES and physical activity among children are ambiguous. Particularly, it is unknown how socioeconomic factors influence the spatial context of children's moderate-vigorous physical activity (MVPA) and sedentary behaviour (SB). This study aimed to investigate by means of Global Positioning System (GPS) and accelerometry whether locations where children engage in MVPA and SB differ by neighbourhood SES...
March 22, 2016: BMC Public Health
https://www.readbyqxmd.com/read/26999381/metabolic-power-method-underestimation-of-energy-expenditure-in-field-sport-movements-using-a-global-positioning-system-tracking-system
#19
Darcy M Brown, Dan B Dwyer, Samuel J Robertson, Paul B Gastin
The purpose of this study was to assess the validity of a global positioning system (GPS) tracking system to estimate energy expenditure (EE) during exercise and field-sport locomotor movements. Twenty-seven participants each completed a 90-min exercise session on an outdoor synthetic futsal pitch. During the exercise session, they wore a 5-Hz GPS unit interpolated to 15 Hz and a portable gas analyzer that acted as the criterion measure of EE. The exercise session was composed of alternating 5-minute exercise bouts of randomized walking, jogging, running, or a field-sport circuit (×3) followed by 10 min of recovery...
November 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/26959041/sports-facilities-shopping-centers-or-homes-what-locations-are-important-for-adults-physical-activity-a-cross-sectional-study
#20
Marijke Jansen, Dick Ettema, Frank Pierik, Martin Dijst
Physical activity (PA) is influenced by the built environment. However, little is known about the types of built environment where adults spend their time, and at what levels of PA they engage in those environments. Understanding the effect of the built environment on PA requires insight into PA behavior at different types of locations (e.g., home, work, shopping centers, and sports facilities). Therefore, this study describes where adults aged 45-65 years were active with moderate-to-vigorous intensity (MVPA), and examines associations of socio-demographic factors and neighborhood with MVPA at these locations...
March 4, 2016: International Journal of Environmental Research and Public Health
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