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This concept video is discussing measured rate of closure. Now rate of closure

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is

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one of those hot topics in golf instruction because it seems to be

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closely tied to consistency or at least that's the way it's being taught. That

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it is more consistent to have a club that has a lower rate of closure compared

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to one that has a really fast rate of closure. Now what we're going to talk

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about in this video is some of the actual numbers that I've seen either with AM

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M

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or I'm going to reference some data from Johnson Claire who's done both AMM as

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well as gears. I think he's one of the bright minds out in golf and he's

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really he's unbiased in how he analyzes different systems and pins them up

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against each other just looking for accurate and factual data. Okay so rate

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of closure is a little bit more tricky than just looking at the follow-through

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position and saying okay if the club is there it was slower than it was there.

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In fact what I'm going to show you is it's usually the opposite. So when

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looking at the data I look at AMM and I'm going to share my experiences with

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looking at the axial velocity which is looking at one of the two more common

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ways that rate of closure is measured which is basically looking at how fast

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the club is rotating like this. One other way that gears measures it it

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presents both. It'll measure the club as it's rotating compared to the target

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line.

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There are a number of different other ways that you could measure it but

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those seem to be the most common too so either compared to the target or the

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shaft rotation itself. Those two are highly correlated together so with most

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of the data on AMM and most of my experience with rate of closure I'm

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looking at that axial rotation graph. What I've seen is that golfers with a

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lower rate of closure do tend to complain about what they complain less

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about consistency. The guys I've seen who have the higher rate of closure tend

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to

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be the ones who come in saying you know what I just kind of I've that two-way

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miss or I spray it my misses are really big they tend to struggle more with

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face

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control. So in this video we're going to talk about the couple key concepts

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that

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I think will help you understand your rate of closure issue. So now that we

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have a definition let's talk about what I think are the three main

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predictors. So we're going to look at supination amount not necessarily rate

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we're going to look at the club passing your chest and we'll look at the arc

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width. Those are I think three really good indicators for looking at what is

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your rate of closure. So the first one we're going to look at is the club

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passing your chest because that's the one that Johnson-Claire found had the

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highest correlation and totally makes sense to me. Basically if I'm I'll go

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slightly off angle so that you can see right around when it would happen. If

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the

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club is straight out in front of my chest the earlier that happens and the

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club passes my body that's going to have a faster rate of closure than if the

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club is yet to reach its widest point or more behind my body. So from the down

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the

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line view something that looks like that I'll try to get it a little higher so

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that it shows up on camera where the club face is not is pretty square as in

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perpendicular to the ground that will actually have a higher rate of closure

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because my body stopped turning and it passed it compared to that where the

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club face has rotated much more but is well behind my body. Now I've had a

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couple other questions relating to supination and the one I'll tie in from

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my own experience is arc width. I find that arc width has one of the higher

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predictors of the rotation speed or the axial velocity and that would make

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sense

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with what John's seeing because arc width is basically the distance the

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grip is from your chest and it will be widest roughly when it's passing your

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chest. So amateurs tend to have it pass the chest much earlier that gives them

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a

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lower arc width and a higher rate of closure. Poor pros tend to have the body

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lead longer and so it won't catch up or get to its widest point until later. So

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those two the club passing and the club getting wide you delay those as late as

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possible and that's going to bring down your your rate of closure issue or

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rate of closure number. Now the one that's kind of the most tricky conceptually

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is looking at supination. Now to be clear I'm talking about anatomical

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supination so I'm looking at the forearm rotation to the elbow all right not

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necessarily the hand compared to the absolute because I could have a whole

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lot of shoulder rotation. For example here I have a lot of shoulder rotation

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but

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not a whole lot of supination. I've still got a good 30 degrees left in the

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tank where here I have pretty much maxed out my supination but I don't have

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nearly as much shoulder rotation. So what I tend to see is in order to have

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your

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body rotated and side bent and in order to have those arms extend you're going

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to have to have a higher amount of supination compared to those golfers

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who stay facing the golf ball and don't turn their body quite as much. Now the

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key is it'll usually be a more gradual rate so it'll supinate for a not

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necessarily it'll start a little earlier and go maybe a touch later in the

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the follow-through but it will be slower going through that phase. The guys who

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tend to have really fast supination values tend to have the least amount of

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actual supination. So tying that together if you want to lower your rate of

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closure you want to be more open at impact you want to have more supination

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on the way through and you want to have the club stay behind the midpoint of

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your chest as long as possible. If you want to have a faster rate of closure

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you're going to let the club pass your body and bend quickly in the follow-

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through

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and you're going to have less forearm supination. So hopefully that helps you

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understand the pattern that I tend to teach especially as it relates to the

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longer clubs. If you're going to try to have consistency with the driver three

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would typically a swing that is built around a lower rate of closure is helpful

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and those swings tend to have more body rotation, body powering the swing, and

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later arm extension with more supination during the follow-through. Now let's

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look at some actual data using a few slides from Johnson Claire's presentation

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about rate of closure. I want to thank John again for being gracious enough to

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share some of his presentation with us. So here we have one of his slides and

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it

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showing two swings that had about the same amount of draw but using two kind

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of different swing styles and you'll see that the one on the left the club face

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is not quite as rotated as the one on the right looking from the down the line

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camera angle but if you look at the actual data down here at the bottom of

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the screen you'll see that the one where the club has rotated more actually had

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a

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slower rate of closure at impact significantly slower compared to the one

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where the face was held off. Now here's that same swing further into the follow

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-through

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and you can see that the one on the right remember these both drew about the

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same the one on the left was holding the face but you can see it passes body

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the

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one on the right there was more body turn and the club was being held more out

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in front of his chest. You can see that even though the one on the right has

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significantly more rotation at this point down it impact the one on the right

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had

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slower club face rotation compared to the one on the left. Now this is my

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favorite

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slide from the whole presentation because I really like the image at the top of

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the screen. So what we'll see if we zoom in on that top image is John's got a

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little wide sticking straight out of his chest so this line is pointing roughly

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at his chest similar to one of my the concept videos on Ironman movement. So

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over here on the left the one with the slower rotation down at impact you can

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see that the club is roughly still in front of his chest and this is probably

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close to shaft parallel. Over here on the right you can see that the club has

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passed his chest much quicker and by a greater degree and down at impact it had

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significantly faster club rotation speed. Regardless of the effort to hold the

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face it's really this amount of the club passing your body that'll have one of

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the bigger effects on your rate of closure speed. So if your goal is to get

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the club out in front of your chest at impact then you're really asking

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yourself

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to have a higher rate of closure and potentially some more variability to

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your swing.