title: Integrating different tracking systems in football: multiple camera semi-automatic system, local position measurement and GPS technologies.
abstract: Abstract During the past decade substantial development of computer-aided tracking technology has occurred. Therefore, we aimed to provide calibration equations to allow the interchangeability of different tracking technologies used in soccer. Eighty-two highly trained soccer players (U14-U17) were monitored during training and one match. Player activity was collected simultaneously with a semi-automatic multiple-camera (Prozone), local position measurement (LPM) technology (Inmotio) and two global positioning systems (GPSports and VX). Data were analysed with respect to three different field dimensions (small, <30 m2to full-pitch, match). Variables provided by the systems were compared, and calibration equations (linear regression models) between each system were calculated for each field dimension. Most metrics differed between the 4 systems with the magnitude of the differences dependant on both pitch size and the variable of interest. Trivial-to-small between-system differences in total distance were noted. However, high-intensity running distance (>14.4 km · h-1) was slightly-to-moderately greater when tracked with Prozone, and accelerations, small-to-very largely greater with LPM. For most of the equations, the typical error of the estimate was of a moderate magnitude. Interchangeability of the different tracking systems is possible with the provided equations, but care is required given their moderate typical error of the estimate.
authors.affiliation: a Football Performance & Science Department , Aspire , Doha , Qatar.
authors.forename: Martin
authors.initials: M
authors.lastname: Buchheit
authors.forename: Adam
authors.initials: A
authors.lastname: Allen
authors.forename: Tsz Kit
authors.initials: TK
authors.lastname: Poon
authors.forename: Mattia
authors.initials: M
authors.lastname: Modonutti
authors.forename: Warren
authors.initials: W
authors.lastname: Gregson
authors.forename: Valter
authors.initials: V
authors.lastname: Di Salvo
keywords: agreement; calibration equations; match analysis; soccer; tracking system; training load