Study about backhand short serve in badminton based on the Euler angle

Service plays an important role to start a game of badminton. One of the service type is backhand short service. In this research, study about how the arm movement for backhand short service was done. Four motionnode sensors were attached to human arm each on the dorsal area of hand (sensor 1), wrist (sensor 2), elbow (sensor 3) and shoulder (sensor 4). The Euler angle was processed by gradient method. Two certified coaches and 3 professional players participated in this research. They were asked to serve the shuttlecock five times. The pattern of arm movement determined from the coaches stroke and the The result showed that there were two types of arm movement while backhand short serving. Players could serve the ball with only the movement in the dorsal area of the hand. The player could also move the sensor 1, 2 and 3 to this serve skill. There was about 85% similarity of the player´s skill compared to the coaches´ or 15% arm movement of young players were unrecognized as short serve. The model could be used by players to evaluate their skills.