In describing the Stack and Tilt swing, Peter Morrice, the author of the article, indulges in a bit of overstatement when he says "Their secret...contradicts almost everything being taught in the game today." But is this swing really that unique?
The Biggest Difference
The most important difference with the "Stack and Tilt" swing is the way it encourages golfers to keep their weight forward - on their front foot during the entire swing. Stack and Tilt does away with the normal "weight shift" concept during the different parts of the swing. With Stack and Tilt the golfer starts with about 60% of her weight on the front foot, and presses even more weight towards the front when taking the club back.
To some golfers this sounds a lot like a "reverse pivot." That happens when the golfer leans towards the target at the top of the swing - a move that has been completely banished from mainstream teaching during the last generation. Most of today's teachers of what we might call the "typical modern swing" want their students to stack their weight over their back foot as the club reaches the top of the swing. But Stack and Tilt has the golfer make a leaning motion towards the target while the club is taken up.
Some Subtle Differences
For many golfers it may be hard to spot the differences at first, but there are some significant ones. For one thing with the typical modern swing the back leg remains bent with a slight flex at the knee. With the Stack and Tilt the back leg straightens out. The photos featured in the Golf Digest article (p.122) demonstrate how the back leg straightens out as it pushes back towards the target.
The result is that the front sided of the body is "stacked" over the front leg, and the back side of the body is "tilted" towards the target.
For a comparison with the typical modern swing look at photos of Tiger's swing of the last few years, or see the photo of V.J. Singh's swing on page 43 of the same issue of Golf Digest. Singh's upper body is "stacked" over his back leg at the top of the swing, and the trailing side of his torso is perpendicular to the ground as he pushes his weight back over his back leg. This is quite different from the way the torso is angled towards the target with the Stack and Tilt swing.
Lessons from the Past
If this looks like a major departure from what has become golf orthodoxy, it probably is. But the modern orthodox swing featuring the weight shift to the back is a relatively new invention. Before the emphasis on "athleticism" that has taken place over the last 15 years, acceptance of the simplistic "weight shift" idea was not nearly as unanimous . You only have to look at old photos of Byron Nelson, Jack Nicklaus, Ben Hogan or Sam Snead to see that these golfers do not make the major shift over the back leg like you see with Tiger Woods.
Or have a close look at the famous 1930s videos produced by Bobby Jones. There is no obvious shift towards the back leg. Jones remains centered over the ball throughout the swing and is more concerned with rotation around the center point than he is with the lateral weight shift characteristic of the typical modern swing.
Can This Stack and Tilt Help the Average Golfer?
There are several interesting points made by the the Stack and Tilt advocates which may help the average golfer hit the golf ball more squarely and (perhaps) more powerfully.
The first is the idea of keeping your weight on your front foot. Shifting one's weight to the back inevitably promotes a shallower swing at the same time as turning the ball into a moving target. This increases the chances of bottoming out too early. Depending on the golfer and the course conditions this can either result in fat shots or thin ones. Pressing into the front foot as you take the club back is a good way to force a steeper approach to the ball and a way to eliminate topping the ball. It also results in a lower trajectory since it results in de-lofting the club face. Unfortunately it also puts more strain on the front knee.
The second has to do with the position of the back elbow and the flatter swing advocated by the Stack and Tilt teachers. A flatter swing is a more rotational one, and in advocating a more rotational movement the Stack and Tilt theory has something in common with other "alternative" swing concepts like the Single Plane Swing recently adopted by Tiger Woods (compliments of Hank Haney.) I'm not sure why a flatter, rounder swing is essential to the Stack and Tilt swing, but I suspect it has to do with the relative difficulty of getting the club going when you have your weight forward. In the jargon of some teachers this weight forward position is what might be called an "unathletic" one. So the idea is to maximize club head speed by taking advantage of the rotation of the torso.
The third point is the not-much-discussed idea of the "pelvic thrust" which the Stack and Tilt guys claim is necessary in order to get the club approaching the ball correctly. With Stack and Tilt, since one's weight and shoulder position are forward, the approach to the ball will be significantly steeper than normal. The pelvic thrust helps to "shallow out" the swing. You achieve this by whipping your hips around and thrusting your lead hip up and towards the target. In other words you have the sensation of jumping up and striking the ball while on your toes. For examples of this see photos of Natalie Golbus or Sergio Garcia, or a younger Gary Player.
If these seem like subtle differences to you, give the "weight forward" idea a try. You will see that it feels quite different from what you are used to. The biggest difference in your game will probably be fewer thin hits. But it may also result in pushes, especially with the longer clubs. You may also find it more physically taxing - requiring more body contortions - and it's questionable whether that can be a good thing.