Microcomputer-based acceleration sensor device for sports biomechanics -stroke evaluation by using swimmer´s wrist acceleration

In order to observe underwater stroke motion in swimming, the author developed a tri-axial acceleration data logger and a tri-axial acceleration/angular velocity data logger Those sensor devices were attached on the wrist joint of the swimmers. The obtained acceleration and angular velocity in swimming indicated the swimmer´s stroke characteristics. In this study, the author applied (1) the discrimination of the stroke phases and (2) the fatigue estimation by the wrist acceleration during intensive interval training.