The purpose of present study was to examine motion analysis for long jump by using personal devices. After takeoff, increased knee flexion speed of takeoff leg caused fall of the trunk. During takeoff phase, the deep knee flexion caused slow speed of approach run. It brought bad result. Just after takeoff, powerful pulling action of arm of opposite from takeoff leg, it raised the trunk. It produces good result. In conclusion, motion analysis by using personal devices produces useful information of sports skill and training
