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Validation of a mechanical method for golf footwear stability measurement

Golf swings are performed primarily in the frontal plane, and have been associated with a lateral shift of the body center of mass (Williams and Cavanagh 1983). Using high-speed cinematography, Williams and Cavanagh (1983) showed that, during the followthrough phase after ball impact, as the body center of mass continues travelling laterally toward the target, the front ankle of the golfer experiences a large amount of inversion. Thus, the authors suggested stability as an important feature for golf footwear. Footwear properties can be assessed using mechanical devices or human subjects. The advantages of using mechanical devices over human subjects are the higher repeatability and lower cost. However, in order to provide externally valid measurements, the outcome from a mechanical test must be verified using results from human assessments. To the authors’ knowledge, a validated mechanical testing device to evaluate the stability of golf footwear does not currently exist. Thus the purposes of the current study were to: (1) propose a mechanical device to measure the stability of golf footwear; (2) verify whether differences in footwear stability, measured during human testing, can be reproduced using this mechanical device.