摘要：The aim of this study was to analyse time characteristics in wheelchair tennis. In 2006 data was obtained from 22 singles tennis matches, played on a hard surface. With computer-vision-based software application called the SAGIT/TENNIS tracking system which had been developed at the Faculty of Electrical Engineering in Ljubljana, time characteristics were analysed accordingly. This programme was used to obtain automatically a player’s motion data from the digitized video recordings of a tennis match. Within the time characteristics it has been established that the active part represented 19.68% of the playing time, while the passive one represented 80.32%. The average time of an individual rally lasted 4.16 seconds and in each rally 2.23 strokes were played. 70% of all the rallies was finished in the first time class. Each half of the tennis court was divided into 14 regions in order to measure the average time spent in each region. It was discovered that most of the active time was spent in regions 1 and 4, representing the base position in wheelchair tennis. There were no statistically significant differences between the winners and losers in the percentage of time spent in a particular region.
关键词：wheelchair tennis; SAGIT/TENNIS tracking system; match analysis; time characteristics
