Patent ID: 8142300

Claim:
A method of analyzing a golf club, diagnosing a swing, selecting a golf club, or designing a golf club, comprises: performing a time-series analysis of a torque that acts on a joint during the swing when modeling using the golf club, and at least a part of a golf player who grips a grip member of the golf club to provide a link model in which the golf club is connected with the golf player via the joint; and using gravity that acts on the golf club in calculation of the torque, wherein the time-series analysis of the torque that acts on the joint during the swing when modeling using the golf club is performed by a computer having a CPU (central processing unit), and wherein an axis of the torque to be analyzed include an A axis that is parallel to a ground and is oriented to a target direction, a B axis that is in a direction of a shaft axis of the golf club in addressing, or a C axis that is parallel to the ground and is perpendicular to the A axis.