| CPC A63B 24/0003 (2013.01) [A63B 24/0062 (2013.01); A63B 60/46 (2015.10); A63B 71/0622 (2013.01); G01C 21/16 (2013.01); A63B 2071/0647 (2013.01); A63B 2102/32 (2015.10); A63B 2220/40 (2013.01); A63B 2225/50 (2013.01)] | 15 Claims |

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1. A method for analyzing a swing motion of a golf club comprising:
a. calculating motion based on acquired data from a swing using one or more sensors;
b. detecting, based on the acquired data in (a), a time of actual impact;
c. calculating a movement direction of a ball hitting a surface of the golf club and an impact posture of the ball hitting surface at the timing of actual impact;
d. calculating an incident angle of the ball hitting surface at the timing of actual impact based on the movement direction and the posture of the ball hitting surface at the timing of actual impact; and
e. displaying projection-related data based on the calculated incident angle of the ball hitting surface at the timing of actual impact,
wherein the acquired data creates an actual torque curve and calculates a deviation from an idealized torque curve, and based on the calculated deviation, creating a torque curve comparison to determine one or more values and matching said values with the golf club to match a subject to an optimal golf club for the subject.
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