Proposal of accuracy analysis of indoor tracking systems in basketball

Abstract

The development of tracking technology caused a exponentially grow-up of research into this topic. The use of standardized methodologies is useful to contrast data of different studies. On the other hand, a low-cost reference system is needed. For this reason, the main aim of the present research is the description of a specific protocol to accuracy assessment of tracking location in indoor conditions in basketball. It can resume in three steps with detailed and easily procedures in the method section. The accuracy analysis method presented can report the centimeter of accuracy in each coordinate that the tracking system measure. A standardized protocol to evaluate the location on indoor conditions in basketball will provide to the sport science professionals a useful tool to analyze the accuracy and reliability of all tracking system, being the results can compare both within and between-court.

The effects of defensive style and final game outcome on the external training load of professional basketball players

“…The system was composed of 6 UWB antennas placed 4.5 m from the perimeter line of the field, and the sampling frequency for positioning data was 20 Hz. For UWB technology, a coefficient of variation (CV) (test-retest reliability) between 0.23% and 0.78% and a percentage typical error of measurement (%TEM) of 2 were found in a previous study with basketball players [ 31 ]. Also, the accuracy (x-axis = 5.2 ± 3.1 cm; y-axis 5.8 ± 2.3 cm) and reliability (x-axis, intraclass correlation coefficient, ICC = 0.65; y-axis, ICC = 0.85) of the indoor tracking system technology were reported [ 32 , 33 ].…”

“…All UWB antennas were located at a height of 3 m and held by a tripod. Once installed, they were switched on one-by-one making sure that the master antenna was the last, and then a process of autocalibration of the antennae was carried out for 5 s [ 31 ]. Each player was fitted with a device (85x48x15 mm, 65 g) including accelerometer, magnetometer and gyroscope on the upper back using an adjustable harnesses, which was turned on and placed 15 min before the warm-up.…”