2019 Volume 141 Pages 33-38
Recently, there are many cutter races held in many places. But their rowing method are each different based on their experiment method of each team. So, there is little study of evaluation for this sport. In this study, we aimed to clarify some features actually seen in the winning teams by quantifying and comparing of the boat speed or turning situations for the good prize in the cutter race. At the 62nd All Japan Cutter Race (total number of 12 teams) held in May 2018, a portable GPS terminal was attached to the bow of each total four 9-meter-long cutter boats, and the recorded the position data by every second. In this study, races are classified into three parts such as start dash (hereinafter "SD"), turning head and cruises. The boats speed, under water ratio of oar during cruising, and required time for SD are evaluated. As a result, SD has smallest time difference between teams and maximum time difference was 6 seconds. The turn can be divided into three groups from the total amount of course change value, boats speed or track pattern. Furthermore, cruise is most important as accounts for more than 80% of the total race, and there was positive correlation between the underwater ratio and the average boats speed during cruise.