Kinesiology of a Full Golf Swing - PowerPoint PPT Presentation

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Kinesiology of a Full Golf Swing

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  1. Kinesiology of a Full Golf Swing Presented by Joseph Urman Fred Doherty Leva Tien Katelyn Carroll Kristina Wilcox

  2. Background Golf Information • Theorized that golf originated from Scotland in the 1100s. • Golf derives from the Dutch kolf which means stick, club, bat • "Gentlemen Only, Ladies Forbidden" acronym for Golf ( which is not true by the way)

  3. Background Golf Information • 4-7% of golfers within the United States who play left-handed, however, most golfers prefer right-handed when playing • Golf is the unofficial sport of the business world.

  4. Anatomy • Large Muscle Groups • Trunk, back, hips, legs, shoulders • Small Muscle Groups • Feet, forearms, wrists, hands, fingers

  5. Anatomy Application • Goal to achieve a fluid motion • Muscle groups contract and relax • Try not to interfere with acceleration

  6. Phases of the Golf Swing • Stance Phase • Back Swing • Downswing • Impact

  7. Correct stability (Firm center of balance) Proper placement of feet in relationship to shoulders Flexing and straightening the knees, hips, spine, neck Stance Phase

  8. Biomechanics of the Stance Phase • Depression of the arm and scapula as shoulders roll forward to grip the club • Axis of rotation = mid trunk • Lever arms = mid trunk and thigh

  9. Biomechanics of the Stance Phase • Torso flexed forward to create primary spinal angle(about 45 degrees) • Secondary angle = lateral bending to right in spinal segments (about 16 degrees)

  10. Torque and Lever Arms • Torque - The tendency of a force to cause rotation around a pivot point • Magnitude of the torque is equal to the product of the force and the lever arm • The length of the arm-club lever at the point of impact will have a direct result on the velocity of the ball

  11. Brings club to highest position in preparation for acceleration Back Swing

  12. Biomechanics of the Back Swing • Recruitment of energy • As club moves backwards shear force is applied to anterior portion of the right foot • Posterior shear force is applied to left foot • Additional torque = rotation of knees, hips, spine, and shoulders • Imaginary axis

  13. A force produced movement where angular velocity creates club head speed Downswing

  14. Biomechanics of the Downswing • Finishes backward movement and begins forward movement • Weight shift onto the inside of right foot and begins towards left foot • Elastic energy stored as a result • Hips closed at 45 degrees and shoulders closed at about 100 degrees

  15. Biomechanics of the Downswing • Majority of torque created by lower body muscle groups • Produces acceleration in the upper body as transferred energy

  16. Follow through and recovery Deceleration of the golf swing Muscle relaxation Reduces risk for injury Impact Phase

  17. Biomechanics of the Impact • Weight transfer is complete • Shear force from both feet are towards the target • Potential energy transfers to kinetic energy as club head contacts golf ball • Left foot supports 80-95% of body weight

  18. Impact/Follow Through Biomechanics • Body decelerates by rotating to a completion point • Occurs as a result of energy absorption back up through the kinetic chain of the body

  19. Mechanisms of Postural Control • First Mechanism • Postural control for balance during underarm swing and weight shift • Second Mechanism • Sequential movement of the arms and hands throughout golf swing

  20. “Golfer’s Elbow” or lateral epicondylitis Left wrist goes into flexion as hands near impact phase Creating pull on the lateral epicondyle and lengthening of the extensor muscles Injuries due to Improper Mechanics

  21. Injuries due to Improper Mechanics • DeQuervain’s Syndrome or tendinitis of the extensor and abductor muscles of the thumb caused by: • Additional load on muscles due to limitations of shoulder motion • Posterior cuff • Absorption of contact forces and rapid shortening and lengthening of muscles

  22. Injuries due to Improper Mechanics • Spinal and back injuries • Laterally shift lower body to increase club speed on downswing instead of rotating pelvis in sync with the shoulders • Spine forced to flex laterally • Shear and rotational forces act on the spine and can cause hyperextension of the spine

  23. References • 2007 www.valleyhealth.com/Health_Library/mayo_catlinks.asp?navid=13&sp=742