Background Global positioning systems (GPS) imbedded with accelerometer systems (AS)
are used in rugby union (RU) to collect information on absolute and relative distances …

Background Within the football codes, medium-distance (ie,> 20 m and≤ 40 m) and long-
distance (ie,> 40 m) sprint performance and maximum velocity sprinting are important …

Background Technology has long been used to track player movements in team sports, with
initial tracking via manual coding of video footage. Since then, wearable microtechnology in …

Recent technological developments have led to the production of inexpensive, non-invasive,
miniature magneto-inertial sensors, ideal for obtaining sport performance measures during …

Objectives There is previously reported a large variety of criterion measures and reference
systems applied to validate position tracking systems in sports. This study aims to investigate …

This study examines the possibilities of sensor-instrumented training (SIT) in middistance
running training sessions. Within this framework, variations of ground contact time (GCT) …

This study aimed to assess the within-and between-session reliability of the KiSprint system
for determining force-velocity-power (FVP) profiling during sprint running. Thirty (23 males, 7 …

The need to quantify aspects of training to improve training prescription has been the holy
grail of sport scientists and coaches for many years. Recently, there has been an increase in …

Objectives: The aim of this study was twofold, firstly to assess the reliability of the VX Sport
Log GPS-based accelerometer, and secondly the validity of the same device compared to a …

Recent innovations in smartphone technology have led to the development of a number of
applications for the valid and reliable measurement of physical performance. Smartphone …