Sensitivity, reliability and construct validity of GPS and accelerometers for quantifying peak periods of rugby competition

PloS One
Samuel T HoweAndrew M Stewart

Abstract

Training prescription and monitoring of team-sport athletes rely on accurate quantification of player movement. Our aim was to determine the sensitivity, reliability and construct validity of measures derived from a wearable device incorporating Global Positioning System (GPS) and accelerometer technology to quantify the peak periods of rugby competition. Match movement data were collected from 30 elite and 30 sub-elite rugby union players across respective competitive seasons. Accelerometer and GPS measures were analysed using a rolling average to identify peak movement for epochs ranging from 5 to 600 seconds. General linear mixed modelling was used to quantify the effects of playing position and match-half on the peak movement and variabilities within and between players represented reliability of each measure. Mean positional differences and match-half changes were assessed via standardisation and magnitude-based decisions. Sensitivity of measures was quantified via evaluation of ("signal") and typical error of measurement ("noise"). GPS and accelerometer measures had poor sensitivity for quantifying peak movement across all epochs and both levels of rugby union competition (noise 4× to 5× the signal). All measures displaye...Continue Reading

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Citations

Jul 1, 2021·Sports Medicine - Open·Robert I M DelvesGrant M Duthie

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Software Mentioned

PlayerLoad
Catapult Sprint
PlayerLoad [UNK]
GPS
Excel
Statistical Analysis System ( SAS
SAS
BodyLoad
Catapult

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