[POWER]I can anticipate a power-up of the swing by greatly waving it relaxedly while feeling weight. When I grasp a red grip and swing, swing power is trained.
[SPEED]I can anticipate speedup of the swing by being conscious so that a sound sounds on the target side, and waving it like a brick. When I grasp a blue grip and swing, swing speed is trained.
[BALANCE]Muscle necessary for golf swing is strengthened effectively. I stabilize the muscle balance of right and left by throwing it on the opposite direction.