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.