Angular Impulse and Balance Regulation During the Golf Swing

in Journal of Applied Biomechanics
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Our aim was to determine how skilled players regulate linear and angular impulse while maintaining balance during the golf swing. Eleven highly-skilled golf players performed swings with a 6-iron and driver. Components contributing to linear and angular impulse generated by the rear and target legs (resultant horizontal reaction force [RFh], RFh-angle, and moment arm) were quantified and compared across the group and within a player (α = .05). Net angular impulse generated by both the rear and target legs was greater for the driver than the 6-iron. Mechanisms used to regulate angular impulse generation between clubs varied across players and required coordination between the legs. Increases in net angular impulse with a driver involved increases in target leg RFh. Rear leg RFh-angle was maintained between clubs whereas target leg RFh became more aligned with the target line. Net linear impulse perpendicular to the target line remained near zero, preserving balance, while net linear impulse along the target line decreased in magnitude. These results indicate that the net angular impulse was regulated between clubs by coordinating force generation of the rear and target legs while sustaining balance throughout the task.

Travis J. Peterson is with the Department of Biomedical Engineering, University of Southern California, Los Angeles, CA, USA. Rand R. Wilcox is with the Department of Psychology, University of Southern California, Los Angeles, CA, USA. Jill L. McNitt-Gray is with the Department ofBiomedical Engineering and the Department of Biological Sciences, University of Southern California, Los Angeles, CA, USA.

Address author correspondence to Jill L. McNitt-Gray at mcnitt@usc.edu.
Journal of Applied Biomechanics
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