Abstract
For sports players, coaches and trainers are supportive persons who give them some appropriate advice for practicing. They can observe players from broader perspectives, and then evaluate their forms and figure out what the players should adjust in order to achieve better performance. This paper presents a support system for sports practice, which aims at working like coaches and trainers. Displaying the difference between your form and a model one, the system provides you with instructive information for improving your playing forms. Microsoft Kinect was employed as a device capturing your form during practice because the device is comparatively inexpensive and can be used even in your private room. In addition, Kinect never require you to put some markers for capturing on your body. A marker often interferes with your movement. Therefore it is important that the device in the support system is markerless. We have experimentally applied the practice support system to a three ball juggling practice to demonstrate that it works as expected. The experimental results showed that the practice support system effectively assisted several persons in acquiring a model throwing form of three ball juggling.
