The purpose of this study was to investigate the relationship between the inward pull motion and body movement to increase the maximum velocity of the clubhead during the downswing phase in men`s driver shot. Four male professional and five male amateur golfers were volunteered as subjects (age = 37.2 ± 14.8 yrs, 1.73 ± 0.05 m, 67.5 ± 7.1 kg). A 10-camera (250 Hz) VICON system was used in an indoor motion analysis facility to capture 3D trajectories of 57 reflective markers attached to each golfer`s body and the driver. The joint force about the grip, the left hand`s radius of curvature, and the Cardan angles of the pelvis and the thorax were calculated during the downswing phase in men`s driver shot. The results revealed that the pelvis and the thorax were bending toward the right side (Y-axis) just before impact. These movements lead to elevation in the left shoulder and consequently the left hand moves inward from the orbit of the hub path just before impact. On that occasion, it is important the thorax is facing the front (Z-axis) to elevate the left shoulder along the swing plane.
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