抄録
This study described the case application of video analysis for the baton-exchange practice of Japanese men's athletics 4×100m relay team toward the Tokyo 2020 Olympic Games, assessing the team's baton-exchange technique. The study also verified the relevance of various indices related to baton-exchange technique and discussed the challenges in future analysis. The passer and receiver were filmed from the side, then their sprinting time and velocities were measured every 5 meters. Some indices relevant to baton-exchange technique were also calculated, e.g., 40m time, from the passer entering into the takeover zone to the receiver passing the point 10m ahead of the zone exit; acceleration of the receiver; baton-exchange duration; baton-exchange position; free distance. The data suggested the team had a high standard of baton-exchange technique. It also indicated that the acceleration of the receiver is important, that shortened baton-exchange duration might not necessarily be required for receiver’s successful acceleration, and that the running speed adjustment of passer toward baton exchange and the free distance should be assessed comprehensively considering various factors such as the approach of passer to the receiver. For appropriate interpretation, it appeared essential to carefully check the data and its situation in detail for each trial. Several issues remain to be tackled in future analysis, with further data collection.
https://ror.org/01tx1rq25 
