Golf Master Tips, Majority of Professional Golfer are Use Left Arm Swinging - Left arm swinging is the swing style used by the majority of professional golfers. They use their pivot-drive action to power the golf swing - by using a pivot-drive action to blast/catapult the left arm down-and-forwards towards impact (and this action represents the release of PA#4).
The characteristic feature of a swinger's action is the fact that a golfer releases the club passively via a centrifugal action (release of PA#2). A left arm swinger shouldn't actively uncock the left wrist during the downswing and he also shouldn't use the right arm/hand to power the golf swing at any time-point during the downswing.
I have described the pivot-driven left arm swinging action in great detail in my downswing chapter and my How to Power the Golf Swing and How to Move the Arms. Wrists and Hands in the Golf Swing review papers. I am going to describe left arm swinging in a different way in this review paper and I am only going to emphasize certain points, which I suspect that many golfers do not fully understand.
I frequently read the threads in many online golf discussion forums, and I have noticed that many golfers are very confused about certain aspects of left arm swinging (eg. concept of a "flat left wrist", concept of the "release" phenomenon, difference between the one-piece takeaway and the right forearm takeaway, how to move the pelvis at the start of the downswing, role of the right arm/forearm in the downswing), which I will discuss in great detail in this review paper.
Arm, wrist and and hand movements
The purest example of a left arm swinging action can be seen in this swing video of a left arm-only golf swing action - http://www.youtube.com/watch?v=uUTk7m5PozQ
In this swing video, the golfer only uses his left arm to power the golf swing. It should be obvious to a viewer that the left arm-only golfer powers the golf swing by first loading his left arm against his upper chest wall during the backswing, when he turns his back towards the target.
He then pivot-rotates his torso very fast towards the target as he starts the downswing and this pivot action blasts/catapults his left arm downwards-and-forwards through the impact zone. It is obviously true that some of his swing power must be derived from an active muscular contraction of his left shoulder girdle muscles, that pulls the left arm away from the chest wall.
However, I believe that most of his swing power is derived from the active pivot action - as the upper torso rotates in the downswing, the left shoulder socket moves very fast towards the target and this left shoulder socket pivot motion pulls the left arm, which in turn pulls the club via its left hand grip attachment (at PP#2).
A golfer needs to understand that the left arm mainly moves downwards-and-forwards in the direction of the ball and it doesn't move outwards (towards the ball-target line) very much. That fact allows the upper part of the left arm to remain in contact with the left pectoral area of the chest wall throughout the downswing and followthrough - even though the left arm is catapulted down-and-forwards in the direction of the ball.
The concept of releasing PA#4 doesn't imply that the left arm must lose its close connection with the left pectoral area of the chest wall, and good left arm swingers, who pivot very well in the downswing/followthrough, maintain a "close connection" between the pivoting torso and swinging left arm at all times during the downswing and followthrough.
Note how the left arm-only golfer's left arm rotates in the backswing. The left arm internally rotates in the left shoulder socket during the backswing and that natural biomechanical action allows his flat left wrist (which faces the target at address) to rotate clockwise during the backswing, so that his flat left wrist faces skywards by the end of his backswing.
A small amount of left forearm pronatory movement is also required to allow his flat left wrist/hand to get to its desiredend-backswing position - roughly opposite, and slightly behind, his right shoulder.
During the downswing, this swiveling motion of the left arm/forearm is reversed in a natural/automatic/passive manner - the left upper arm externally rotates in the left shoulder socket while the left shoulder socket moves in space, and the left forearm supinates so that the back of the flat left wrist/hand faces the target at impact.
These biomechanical motions of the left arm/forearm occur naturally - if a golfer allows them to occur in a natural manner. A golfer should never attempt to contrive to move the left arm in a biomechanically unnatural manner in the backswing/downswing.
What represents the natural biomechanical motion of the left arm in a swinger's action?
In my accompanying swing video lesson, I demonstrate how the left arm tends to naturally move when a golfer pivot-rotates the torso in space.
When a golfer pivot-rotates the torso in the backswing with the intention of getting his left hand opposite his right shoulder by the end of his backswing, the left arm will naturally/automatically rotate clockwise in the left shoulder socket joint and the left forearm will naturally/automatically pronate so that the back of the flat left wrist/hand will face skywards by the end of the backswing. The amount of left forearm pronation required depends on a golfer's posture.
Compare the posture and left arm/forearm movement during the takeaway of two golfers.
Stewart Cink - http://www.youtube.com/watch?v=4tjrAnidTu4&eurl
Kevin Sutherland - http://www.youtube.com/watch?v=Rzqejo538gI
Note, by the end of the takeaway, that Stewart Cink's clubface is roughly parallel to the ball-target line - toe of the club is pointing straight up and the clubface is slightly open to the clubhead arc (image 2), while Kevin Sutherland's clubface is still pointing at the ball - it is approximately square to the clubhead arc (image 4) and the toe of the clubhead is angled downwards.
The reason for the difference is the variable degree of left forearm rotation (left forearm pronation) that is occurring during the takeaway - there is much more left forearm rotation (pronation) happening in Stewart Cink's takeaway action than Kevin Sutherland's takeaway action. Why does it occur?
I believe that a golfer, who stands more erect (like Stewart Cink), has to incorporate more left forearm rotation (coupled to his left arm's internal rotation action at left shoulder socket level) to get his flat left wrist to an end-backswing position (opposite and slightly behind the right shoulder) where it is facing skywards. In other words, a golfer needs to incorporate a takeaway swivel action in the backswing that allows the back of the flat left wrist/hand to lie parallel to the inclined plane in the mid-late backswing. (Source)
0 komentar:
Post a Comment