MOTION ANALYSIS METHOD, MOTION ANALYSIS PROGRAM, STORAGE MEDIUM THEREOF, MOTION ANALYSIS APPARATUS, AND MOTION ANALYSIS SYSTEM

摘要

A motion analysis method includes calculating a level of a swing using an output from an inertial sensor measuring the swing of exercise equipment on the basis of a relationship between a first angle formed between a tangential direction of a swing trajectory of a ball hitting portion of the exercise equipment at impact and a target hitting direction, and a second angle formed between a direction orthogonal to a hitting surface of the ball hitting portion at the impact and the target hitting direction.