關於愛，我是個小學生。

The Counter-fall and Why it is Essential for a Physics Perfect Golf Swing - by Danny Lee

Sound science, proper physics and feel are the principles you can't escape, but are always searching for in your golf swing.  When they come together in the correct fashion, you will feel the freedom in your swing, and the results will show.

Odds are, you have felt the counterfall working in your every-day life and have never been conscious of it.  If you have ever locked arms with another person or child in the back yard, and swung each other in circles, you both had to lean backwards in equilibrium, in order to counter-balance the rotational force pulling you both toward each other. This is the centripetal force at work. In physics, we see the same thing applied in every rotary movement where weight is moving on one side of an object.

In the golf swing, the weight (force) of your arms and club swinging in front of your body are trying to pull you off center, and in most amateurs ends up causing them to come over the top. The human arm can weigh anywhere from 8 to 20 pounds:  imagine your arms and club as a dumbbell attached to your chest that you are trying to throw in front of you at the speed you swing a club.  The next time you're watching a place kicker in a football game, a pitcher throw a baseball, or an Olympic hammer thrower in action, pay special attention to the off vertical move they start making before they turn through to release the object.  That 'off-vertical' move is the counterfall, and it is also necessary in a sound golf swing.

Typically, what you will see in most golfers, is a move they have manufactured to take place of the counterfall - a compensation. For instance, most people's posture tends to be too bent over with their torso and upper body balanced over the quads (fronts of their legs) instead of the hamstrings (back of their legs). What will happen, in this case, is when they turn in the back swing, they shift their weight forward onto the front leg (toward the toes and quads). The detrimental part of this is that as they try to rotate, it will not carry them backwards easily into the Counterfall and from here one of  two things could happen.

If they try to swing from this position, the force of their arms swinging will pull them onto their faces if they stay completely relaxed (I doubt this has ever happened). Your natural instinct is to protect you from harm.  If you were to swing like this, you will start internalizing energy to maintain balance, but will lock up your rotation (99% of people only advance their hands and shoulders through the ball in the last 3 frames through impact). This causes you to lose much of your power, because the rest of the body is not free to move through impact, as it is fighting for balance and the body is very weak rotationally. The other option is to somehow create an equal amount of force moving in the opposite direction to allow you to clear your hips and body through the shot. This can come from pulling your hips back and around or snapping your front knee back (see if you can guess which professionals  do that) or other compensatory moves in an effort to stay on plane.

The cure for your aches and pains, including your power and control loss lies in being able to properly balance the forces out between what is pulling you forward and what is pulling you back. The simplest way (which is also easiest on your body) is at the top of your back swing, once you have made a full weight transfer back to your left heel, allow your body to start falling away from the ball. There is a perfect “tipping point” you will reach that allows for free rotation and subsequently a complete release of the club head.  You will also find that the more upright your posture is and the closer you are to the ball, the easier it will be to fall away (the counterfall). Master this move and you will have found the swing key for which you have always been searching!

The secret to feeling an effortless golf swing that maximizes power and control, lies in your ability to properly offset the forces pulling you toward your toes in the downswing.  To accomplish this, once the arms have been thrown up to as soft a spot as possible, we want to allow the weight to transfer back to your left heel while still opening up the shoulders and hips in the backswing. you must “counter-fall” sufficiently at the start of the delivery.

The arms comprise of more of the human body's weight than we are usually aware of.  If you are solidly balanced on your feet when the downswing begins, the weight of your arms and club swinging in front of you, will instantly pull you toward your toes (over the top) and out of plane, not unlike a washing machine with all the clothes on one side of it.  Most golfers are under the false impression that to they want to be balanced during a golf swing with their feet firmly planted on the ground.  What we are really searching for in an effortless golf swing, is dynamic rotary equilibrium, where the pull against the body from the weight of the arms and club swinging around us, is negated by the counter-fall, thus giving the appearance of being “balanced” during the swing. Take a look at YouTube sequences of a hammer thrower. Because of the significant weight of the arms and hammer, the body pivots at close to forty degrees 'off vertical' to keep the thrower from being pulled onto his/her face during the rotation. A golf swing is a microcosm of the same move, just in a slightly different plane and with a lighter 'club'. All sports where rotation is employed require a Counter Fall in order to maintain equilibrium.

In a proper golf swing made by a right-handed player, the weight shifts to the right leg and back to the left leg as the shoulders and hips turn back. As the weight shifts from the right, it lands slightly against the left leg, enough to deflect the body into the counter-fall, on a line or vector that's approximately seventy degrees left of the target line, ninety degrees being straight behind you. The feeling is like that of tipping a barrel onto its edge before you roll it. The deeper one moves into the counter-fall before the shoulders start forward in the delivery, the less internal effort it takes to turn the core through impact (if the arms are in a state of dead-fall), and the faster it will move. Using mass rotation to sling the arms and club, instead of using shoulder and arm strength, is the proper way to apply power to give you an effortless golf swing.

Study the cross-footed drills and they will teach you to make a perfect counter-fall.