Golf players exhibit changes to grip speed parameters during club release in response to changes in club stiffness.

The influence of golf club stiffness on driving performance is currently unclear, and it is possible that this ambiguity is due in part to golfer adaptation to equipment. The purpose of the current study was to elucidate mechanisms of adaptation to club stiffness, during the golf swing, by employing tendon vibration to distort proprioceptive feedback. Vibration (∼50 Hz, ∼1 mm amplitude) was applied to the upper extremities of 24 golfers using DC motors with eccentric weights. Golfers hit golf balls in a laboratory setting using three clubs of varying shaft stiffness, and club kinematics were recorded using high speed (180 Hz) digital cameras. The results demonstrated significant slowing of the club grip during club release for a high-stiffness shaft with vibration. This suggests that, when proprioceptive feedback is available, players adapt to changes in club stiffness by modifying the release dynamics of the club late in the downswing.

[1]  S. Lephart,et al.  AN EIGHT‐WEEK GOLF‐SPECIFIC EXERCISE PROGRAM IMPROVES PHYSICAL CHARACTERISTICS, SWING MECHANICS, AND GOLF PERFORMANCE IN RECREATIONAL GOLFERS , 2007, Journal of strength and conditioning research.

[2]  C. C. Chen,et al.  Numerical study on the wrist action during the golf downswing , 2007 .

[3]  Steve Haake.  The engineering of sport: design and development , 1998 .

[4]  V. Gurfinkel,et al.  Proprioceptive consequences of tendon vibration during movement. , 1995, Journal of neurophysiology.

[5]  R. Neal,et al.  3D Kinematics and Kinetics of the Golf Swing , 1985 .

[6]  C Ghez,et al.  Proprioceptive control of interjoint coordination. , 1995, Canadian journal of physiology and pharmacology.

[7]  Darren J. Stefanyshyn,et al.  Vibration at the wrist and elbow joints during the golf swing reveals shaft-specific swing kinematics , 2010 .

[8]  J. Roll,et al.  Kinaesthetic role of muscle afferents in man, studied by tendon vibration and microneurography , 2004, Experimental Brain Research.

[9]  Rod Cross,et al.  Elite tennis player sensitivity to changes in string tension and the effect on resulting ball dynamics , 2008 .

[10]  R. E. Fornes.  The Physics of Golf , 1909, Nature.

[11]  Steven M Nesbit,et al.  A three dimensional kinematic and kinetic study of the golf swing. , 2005, Journal of sports science & medicine.

[12]  E. Sprigings,et al.  Examining the delayed release in the golf swing using computer simulation , 2002 .

[13]  Eric Thain.  Science and Golf IV : proceedings of the World Scientific Congress of Golf , 2002 .

[14]  Steve Haake,et al.  The Engineering of Sport: Research, Development and Innovation , 2000 .

[15]  Howard Poizner,et al.  Influence of movement speed on accuracy and coordination of reaching movements to memorized targets in three-dimensional space in a deafferented subject , 2003, Experimental Brain Research.

[16]  Hiroshi Yamasaki,et al.  Interaction torque contributes to planar reaching at slow speed , 2008, Biomedical engineering online.

[17]  Club Shaft Weight in Putting Accuracy and Perception of Swing Parameters in Golf Putting , 2007, Perceptual and motor skills.

[18]  K. Kudo,et al.  Utilization and compensation of interaction torques during ball-throwing movements. , 2003, Journal of neurophysiology.

[19]  Pickering,et al.  On the double pendulum model of the golf swing , 1999 .

[20]  H. Nagasaki,et al.  Incomplete Posture Adjustment during Rapid Arm Movement , 2009, Perceptual and motor skills.

[21]  P. Milburn.  Summation of segmental velocities in the golf swing. , 1982, Medicine and science in sports and exercise.

[22]  R L Sainburg,et al.  Control of limb dynamics in normal subjects and patients without proprioception. , 1995, Journal of neurophysiology.

[23]  R Jones,et al.  The effect of shaft flexibility on junior golfers' performance , 2004, Journal of sports sciences.

[24]  Alastair J. Cochran,et al.  Science and Golf III: Proceedings of the World Scientific Congress of Golf , 1998 .

[25]  G. Fleisig,et al.  Kinematic analysis of swing in pro and amateur golfers. , 2008, International journal of sports medicine.

[26]  C F Finch,et al.  How well does club head speed correlate with golf handicaps? , 2004, Journal of science and medicine in sport.

[27]  Otmar Bock,et al.  A method to reversibly degrade proprioceptive feedback in research on human motor control , 2007, Journal of Neuroscience Methods.

[28]  D J Ostry,et al.  Compensation for interaction torques during single- and multijoint limb movement. , 1999, Journal of neurophysiology.

[29]  P L Gribble,et al.  Inter-joint coupling strategy during adaptation to novel viscous loads in human arm movement. , 2004, Journal of neurophysiology.