Type

Journal Article

Authors

Eamonn Delahunt
Peter Tierney
Daniel P Tobin
Cillian Reardon

Subjects

Computer Science

Topics
future video technology video analysis micro rugby union technology video coding collision

Collision count in rugby union: A comparison of micro-technology and video analysis methods. (2016)

Abstract The aim of our study was to determine if there is a role for manipulation of g force thresholds acquired via micro-technology for accurately detecting collisions in rugby union. In total, 36 players were recruited from an elite Guinness Pro12 rugby union team. Player movement profiles and collisions were acquired via individual global positioning system (GPS) micro-technology units. Players were assigned to a sub-category of positions in order to determine positional collision demands. The coding of collisions by micro-technology at g force thresholds between 2 and 5.5 g (0.5 g increments) was compared with collision coding by an expert video analyst using Bland-Altman assessments. The most appropriate g force threshold (smallest mean difference compared with video analyst coding) was lower for all forwards positions (2.5 g) than for all backs positions (3.5 g). The Bland-Altman 95% limits of agreement indicated that there may be a substantial over- or underestimation of collisions coded via GPS micro-technology when using expert video analyst coding as the reference comparator. The manipulation of the g force thresholds applied to data acquired by GPS micro-technology units based on incremental thresholds of 0.5 g does not provide a reliable tool for the accurate coding of collisions in rugby union. Future research should aim to investigate smaller g force threshold increments and determine the events that cause coding of false positives.
Collections Ireland -> University College Dublin -> PubMed

Full list of authors on original publication

Eamonn Delahunt, Peter Tierney, Daniel P Tobin, Cillian Reardon

Experts in our system

1
Eamonn Delahunt
University College Dublin
Total Publications: 115
 
2
Peter Tierney
University College Dublin
 
3
Daniel P Tobin
University College Dublin
Total Publications: 7