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https://www.readbyqxmd.com/read/27736256/validity-of-10-hz-gps-and-timing-gates-for-assessing-maximum-velocity-in-professional-rugby-union-players
#1
Gregory Roe, Joshua Darrall-Jones, Christopher Black, William Shaw, Kevin Till, Ben Jones
PURPOSE: The purpose of this study was to investigate the validity of timing gates and 10 Hz GPS units (Catapult Optimeye S5) against a criterion measure (50 Hz radar gun) for assessing maximum sprint velocity (Vmax). METHODS: Nine male professional rugby union players performed three maximal 40 m sprints with three minutes rest between each effort with Vmax assessed simultaneously via timing gates, 10 Hz GPSOpen (Openfield software), GPSSprint (Sprint software) and radar gun...
October 13, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/25804422/inertial-sensors-to-estimate-the-energy-expenditure-of-team-sport-athletes
#2
Emily J Walker, Andrew J McAinch, Alice Sweeting, Robert J Aughey
OBJECTIVES: To quantify the energy expenditure of Australian Football training and matches and the total daily energy expenditure of Australian Football players using tri-axial accelerometers. DESIGN: Cross sectional observation study. METHODS: An algorithm was developed for the MiniMax 4.0 (Catapult Innovations, Scoresby Australia) using measured oxygen uptake and accelerometer data to estimate energy expenditure of 18 Australian Football players during training and matches...
February 2016: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/24276300/validity-and-interunit-reliability-of-10-hz-and-15-hz-gps-units-for-assessing-athlete-movement-demands
#3
COMPARATIVE STUDY
Richard J Johnston, Mark L Watsford, Stephen J Kelly, Matthew J Pine, Robert W Spurrs
The purpose of this study was to assess the validity and interunit reliability of 10 Hz (Catapult) and 15 Hz (GPSports) Global Positioning System (GPS) units and investigate the differences between these units as measures of team sport athlete movement demands. A team sport simulation circuit was completed by 8 trained male participants. The movement demands examined included: total distance covered (TD), average peak speed, and the distance covered, time spent, and the number of efforts performed low-speed running (0...
June 2014: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/24263650/use-of-integrated-technology-in-team-sports-a-review-of-opportunities-challenges-and-future-directions-for-athletes
#4
REVIEW
Carla L Dellaserra, Yong Gao, Lynda Ransdell
Integrated technology (IT), which includes accelerometers, global positioning systems (GPSs), and heart rate monitors, has been used frequently in public health. More recently, IT data have been used in sports settings to assess training and performance demands. However, the impact of IT in sports settings is yet to be evaluated, particularly in field-based team sports. This narrative-qualitative review provides an overview of the emerging impact of IT in sports settings. Twenty electronic databases (e.g., Medline, SPORTdiscus, and ScienceDirect), print publications (e...
February 2014: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/23090320/quantifying-the-physical-demands-of-collision-sports-does-microsensor-technology-measure-what-it-claims-to-measure
#5
Tim J Gabbett
The physical demands of rugby league, rugby union, and American football are significantly increased through the large number of collisions players are required to perform during match play. Because of the labor-intensive nature of coding collisions from video recordings, manufacturers of wearable microsensor (e.g., global positioning system [GPS]) units have refined the technology to automatically detect collisions, with several sport scientists attempting to use these microsensors to quantify the physical demands of collision sports...
August 2013: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/22122431/validity-and-reliability-of-gps-for-measuring-instantaneous-velocity-during-acceleration-deceleration-and-constant-motion
#6
Matthew C Varley, Ian H Fairweather, Robert J Aughey
In this study, we assessed the validity and reliability of 5 and 10 Hz global positioning systems (GPS) for measuring instantaneous velocity during acceleration, deceleration, and constant velocity while straight-line running. Three participants performed 80 running trials while wearing two GPS units each (5 Hz, V2.0 and 10 Hz, V4.0; MinimaxX, Catapult Innovations, Scoresby, VIC, Australia). The criterion measure used to assess GPS validity was instantaneous velocity recorded using a tripod-mounted laser. Validity was established using the standard error of the estimate (± 90% confidence limits)...
2012: Journal of Sports Sciences
https://www.readbyqxmd.com/read/21266740/variability-of-gps-units-for-measuring-distance-in-team-sport-movements
#7
Denise Jennings, Stuart Cormack, Aaron J Coutts, Luke J Boyd, Robert J Aughey
PURPOSE: To examine the difference in distance measured by two global positioning system (GPS) units of the same model worn by the same player while performing movements common to team sports. METHODS: Twenty elite Australian football players completed two trials of the straight line movement (10, 20, 40 m) at four speeds (walk, jog, stride, sprint), two trials of the changes of direction (COD) courses of two different frequencies (gradual and tight), and five trials of a team sport running simulation circuit...
December 2010: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/20861523/the-validity-and-reliability-of-gps-units-for-measuring-distance-in-team-sport-specific-running-patterns
#8
Denise Jennings, Stuart Cormack, Aaron J Coutts, Luke Boyd, Robert J Aughey
PURPOSE: To assess the validity and reliability of distance data measured by global positioning system (GPS) units sampling at 1 and 5 Hz during movement patterns common to team sports. METHODS: Twenty elite Australian Football players each wearing two GPS devices (MinimaxX, Catapult, Australia) completed straight line movements (10, 20, 40 m) at various speeds (walk, jog, stride, sprint), changes of direction (COD) courses of two different frequencies (gradual and tight), and a team sport running simulation circuit...
September 2010: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/19953825/validity-and-reliability-of-gps-units-to-monitor-cricket-specific-movement-patterns
#9
COMPARATIVE STUDY
Carl Petersen, David Pyne, Marc Portus, Brian Dawson
PURPOSE: The validity and reliability of three commercial global positioning system (GPS) units (MinimaxX, Catapult, Australia; SPI-10, SPI-Pro, GPSports, Australia) were quantified. METHODS: Twenty trials of cricket-specific locomotion patterns and distances (walking 8800 m, jogging 2400 m, running 1200 m, striding 600 m, sprinting 20- to 40-m intervals, and run-a-three) were compared against criterion measures (400-m athletic track, electronic timing). Validity was quantified with the standard error of the estimate (SEE) and reliability estimated using typical error expressed as a coefficient of variation...
September 2009: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/19567930/variability-in-movement-patterns-during-one-day-internationals-by-a-cricket-fast-bowler
#10
Carl Petersen, David B Pyne, Marc R Portus, Stuart Karppinen, Brian Dawson
PURPOSE: The time-motion characteristics and the within-athlete variability in movement patterns were quantified for the same male fast bowler playing One Day International (ODI) cricket matches (n=12). METHODS: A number of different time motion characteristics were monitored using a portable 5-Hz global positioning system (GPS) unit (Catapult, Melbourne, Australia). RESULTS: The bowler's mean workload per ODI was 8+/-2 overs (mean+/-SD). He covered a total distance of 15...
June 2009: International Journal of Sports Physiology and Performance
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