본문 바로가기
  • Home

Invariant Properties of Upper and Lower Body Coordination

  • 인문논총
  • 2014, 34(), pp.121-136
  • Publisher : Institute for Human studies, Kyungnam University
  • Research Area : Humanities > Other Humanities
  • Published : June 30, 2014

Tae Hoon Kim 1

1경남대학교

Accredited

ABSTRACT

Two different short iron shots were analyzed together to evaluate how the force and/or timing are controlled in the golf swing. Force magnitude and timing for clubhead movement and weight shiftwere compared to find out timing invariance during a golf shot, which is generated by upper andlower body coordination. Younger golfers with relatively advanced skill level(handicap 5 10 strokes)hit a short iron shot for different distances. During a golf shot, an accelerometer attached to the backof the clubhead provided a measure of force versus time with three peaks corresponding to backswing,downswing, and follow through. Similarly, two peaks corresponding to backward and forwardweight shift were provided by two forceplates under the practice mat. The force difference betweenbackswing and downswing peaks changed by over 600% between a short chip shot and an 80 yardapproach shot. In contrast, the time interval between these peaks changed by only 29%. Similarresults were found for the weight shift. In other words, timing of clubhead force and weight shiftstayed almost invariant when increasing the required shot distance. These results suggested thattiming is relatively invariant for shots with different force magnitudes, that force is controlledindependently from timing in order to hit the ball different distances with the same club, and thatconstant rhythm in golf shots may be evidenced by relatively invariant timing.

Citation status

* References for papers published after 2022 are currently being built.