Tuesday, September 21, 2010

Novice

video

Expert

video video
(Posterior View)

(Anterior/Lateral View)


Phase 1
  • Making sure your center of gravity is equal have your knees bent and your left leg slightly in front of your right leg.
  • Hold the racket in your dominate hand to where you feel most comfortable(hold it like your shaking someone's hand)
  • Make sure your Phalanges are holding the racket at the bottom of the handle
  • Have your knees bent
  • Standing on the balls on your feet
  • The racket away from the body in the Posterior view
Phase 2
  • When tennis ball is at waist height (Pelvic Girdle)
  • With your knees still bent
  • Having your forearm in the pronation rotation
  • Standing on the balls of your feet
  • Have the racket close to the ground in a diagonal motion, in the diagonal plane
(Posterior View)

(Anterior View)


Phase 3
  • As a Free body Diagram, when hitting the tennis ball in a diagonal motion,
  • Your on the balls of your feet
  • Your left knee twisting in a lateral rotation
  • Your right knee twisting in a medial rotation
  • Keep your arms locked in a bent position (L position)
  •  While twisting your back in transverse plane
  • Your arm (the one holding the racket) with stay bent in the L position, but your arm will be tight in that position and will also stay in the same motion which will consist of your shoulder in a horizontal adduction when your back is twisting in the transverse plane. (it's all one motion)
  • While twisting, is the same time you will hit the tennis ball with force.





(Posterior View)
(Anterior View)

Phase 4
  • In the Longitudinal Axis
  • Finish with a follow thru in the transverse plane that causes your arm to finish high. across the chest
  • While knees still bent
  • On the balls of you feet ( like defensive stance in basketball) or (squats)
  • Be prepared for the ball to be returned.