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Thorax Acceleration Creates Pelvis Deceleration
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Phil Cheetham demonstrates how the thorax (upper body) automatically decelerates the pelvis when it “fires” aggressively during the downswing.
Click here to view the article
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Variations in the Downswing of the Kinematic Sequence
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Variations in the downswing of the kinematic sequence: stretching, riding and fanning. These phenomina can be described by the force-velocity curve of the muscle contraction.
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Simple Model of the Pelvis-Thorax Kinematic Sequence
Phil Cheetham March 2009
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A simple disk-spring model of the pelvis and thorax does a good job at explaining the reason for acceleration and deceleration in the kinematic sequence curves during the downswing in golf.
Click here to view the article
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Motion Analysis for Golf-2D and 3D Coordinate Systems
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Click here to view the article
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Mass-Spring System shows a Natural Kinematic Sequence
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Here is a simple mathematical model that my friend YK did for me. He just got his PhD in Biomechanics at ASU and is now working as a post-doc there. It shows that the kinematic sequence can be generated naturally if the springs and masses in the model are organized properly. It then relates this to the kinematic sequence in the golf swing. Don't worry I didn't include all the differential equations. (Dec 08).
Click here to view the articlef
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Sharing Swing Data - Example Swing
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Every so often I will post a swing file and open it up for discussion. I will also occasionally post TPI 3D reports and discuss them too. Here is an example swing just to get started. This is an AMM 12 sensor file and you can view and analyze it if you have at least the TPI 3D Analyzer. This golfer is a club pro with a handicap of 5. Check it out.
To down load it just click on it and choose "Save"; sometimes this just tries to open the data directly; if your computer does this then close the file and try right clicking on it instead, then choose "Save Target As"; save the raw swing file data (.rw3 file) to your Demo Data folder (if you don't have one create one as if it were a new subject); using the Save dialog box navigate to "c:\TPI 3D Data\AMM Golf\Demo Data - 1" and drop the file in there; then open TPI 3D and using the menu item "Setup > Select Subject", select "Demo Data - 1"; now select "File > Open a Motion File"; next choose "Raw Motion Data" from "Files of Type" at the bottom of the dialog box; open the swing, this will cause all the data to be recomputed; now go and open it again; this time open the .sm3 and every thing should be there; 3D view, comparison table and reports. A little complicated I know but for now that's it. The swing data is posted on the next line.
Click here to view the article
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World Golf Fitness Summit 2008 - Phil's Presentation
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There were several presentations that focused on TPI 3D and its applications; Greg will post portions of them on the myTPI site; here is mine complete with notes. Please if you use any of this information in your publications or presentations; cite your source appropriately (see below). This is standard practice in the scientific world. Thanks, Phil.
Cheetham, P.J. Why the Pro's Hit Further than You: Answers from 3D Motion Analysis and the Kinematic Sequence. Proceedings from the World Golf Fitness Summit. Anaheim, California. October, 2008.
Click here to view the article
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Stretching the XFactor-Paper with updated information
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Click here to view the article
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Kinematic Sequence-Transition and Downswing
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Click here to view the article
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Definitions of Parameters Measured by TPI 3D
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Here are the definitions of the main parameters that are used in TPI 3D. The K-Vest has a subset of these parameters and the AMM 12 Sensor has them all. You can graph each in the graphs section, or look at there values in Comparison Table, at Address, Top, Impact and Finish as well as the half points (club parallel in backswing, downswing and follow through) and also see them plus other parameters in the reports.
Click here to view the article
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Comparison of Kinematic Sequence Parameters - Amateur v Professional
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Here is the paper we wrote for the World Scientific Congress of Golf that was held in Mesa earlier this year. If you cite it please use the reference below.
Cheetham, P.J., Rose, G.A., Hinrichs, R.N., Neal, R.J., Mottram, R.E., Hurrion, P.D. and Vint, P.F. Comparison of kinematic sequence parameters between amateur and professional golfers. Science and Golf V: Proceedings of the World Scientific Congress of Golf. Crews, D. and Lutz, R (Eds). Energy In Motion. Mesa Arizona. (pp 30-36), 2008.
Click here to view the article
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Digitizing Body Points
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Click here to view the article
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John Hellström's Paper from the World Scientific Congress of Golf 1
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Here is a paper we presented at the World Scientific Congress of Golf 5. Please use the reference below if you cite it. Cheers, John
Hellström J, Tinmark F. The Association Between Stability and Swing Kinematics of Skilled High School Golfers. In: Crews D, Lutz R, editors. Science and Golf V. Proceedings of the World Scientific Congress of Golf. Mesa, AZ: Energy in motion Inc, 2008: 37-43
Click here to view the article
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Explanation of Biomechanics Comparative Report
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I wrote this document as a chapter in the TPI Biomechanics Level 2 Manual. It explains all the graphs and tables in the TPI 3D Biomechanics Report for the full-body 12 Sensor AMM system. It is also applicable to the 8 and 4 sensor AMM systems and the K-Vest as well, but of course these systems wont have all the parameters that the full-body version does. (Dec 08).
Click here to view the article
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Thorax Acceleration Creates Pelvis Deceleration
|
 |
Phil Cheetham demonstrates how the thorax (upper body) automatically decelerates the pelvis when it “fires” aggressively during the downswing.
Click here to view the article
|
|
Variations in the Downswing of the Kinematic Sequence
|
 |
Variations in the downswing of the kinematic sequence: stretching, riding and fanning. These phenomina can be described by the force-velocity curve of the muscle contraction.
|
| |
|
|
Simple Model of the Pelvis-Thorax Kinematic Sequence
Phil Cheetham March 2009
|
 |
A simple disk-spring model of the pelvis and thorax does a good job at explaining the reason for acceleration and deceleration in the kinematic sequence curves during the downswing in golf.
Click here to view the article
|
|
Motion Analysis for Golf-2D and 3D Coordinate Systems
|
 |
Click here to view the article
|
|
Mass-Spring System shows a Natural Kinematic Sequence
|
 |
Here is a simple mathematical model that my friend YK did for me. He just got his PhD in Biomechanics at ASU and is now working as a post-doc there. It shows that the kinematic sequence can be generated naturally if the springs and masses in the model are organized properly. It then relates this to the kinematic sequence in the golf swing. Don't worry I didn't include all the differential equations. (Dec 08).
Click here to view the articlef
|
|
Sharing Swing Data - Example Swing
|
 |
Every so often I will post a swing file and open it up for discussion. I will also occasionally post TPI 3D reports and discuss them too. Here is an example swing just to get started. This is an AMM 12 sensor file and you can view and analyze it if you have at least the TPI 3D Analyzer. This golfer is a club pro with a handicap of 5. Check it out.
To down load it just click on it and choose "Save"; sometimes this just tries to open the data directly; if your computer does this then close the file and try right clicking on it instead, then choose "Save Target As"; save the raw swing file data (.rw3 file) to your Demo Data folder (if you don't have one create one as if it were a new subject); using the Save dialog box navigate to "c:\TPI 3D Data\AMM Golf\Demo Data - 1" and drop the file in there; then open TPI 3D and using the menu item "Setup > Select Subject", select "Demo Data - 1"; now select "File > Open a Motion File"; next choose "Raw Motion Data" from "Files of Type" at the bottom of the dialog box; open the swing, this will cause all the data to be recomputed; now go and open it again; this time open the .sm3 and every thing should be there; 3D view, comparison table and reports. A little complicated I know but for now that's it. The swing data is posted on the next line.
Click here to view the article
|
|
World Golf Fitness Summit 2008 - Phil's Presentation
|
 |
There were several presentations that focused on TPI 3D and its applications; Greg will post portions of them on the myTPI site; here is mine complete with notes. Please if you use any of this information in your publications or presentations; cite your source appropriately (see below). This is standard practice in the scientific world. Thanks, Phil.
Cheetham, P.J. Why the Pro's Hit Further than You: Answers from 3D Motion Analysis and the Kinematic Sequence. Proceedings from the World Golf Fitness Summit. Anaheim, California. October, 2008.
Click here to view the article
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Stretching the XFactor-Paper with updated information
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 |
Click here to view the article
|
|
Kinematic Sequence-Transition and Downswing
|
 |
Click here to view the article
|
|
Definitions of Parameters Measured by TPI 3D
|
 |
Here are the definitions of the main parameters that are used in TPI 3D. The K-Vest has a subset of these parameters and the AMM 12 Sensor has them all. You can graph each in the graphs section, or look at there values in Comparison Table, at Address, Top, Impact and Finish as well as the half points (club parallel in backswing, downswing and follow through) and also see them plus other parameters in the reports.
Click here to view the article
|
|
Comparison of Kinematic Sequence Parameters - Amateur v Professional
|
 |
Here is the paper we wrote for the World Scientific Congress of Golf that was held in Mesa earlier this year. If you cite it please use the reference below.
Cheetham, P.J., Rose, G.A., Hinrichs, R.N., Neal, R.J., Mottram, R.E., Hurrion, P.D. and Vint, P.F. Comparison of kinematic sequence parameters between amateur and professional golfers. Science and Golf V: Proceedings of the World Scientific Congress of Golf. Crews, D. and Lutz, R (Eds). Energy In Motion. Mesa Arizona. (pp 30-36), 2008.
Click here to view the article
|
|
Digitizing Body Points
|
 |
Click here to view the article
|
|
John Hellström's Paper from the World Scientific Congress of Golf 1
|
 |
Here is a paper we presented at the World Scientific Congress of Golf 5. Please use the reference below if you cite it. Cheers, John
Hellström J, Tinmark F. The Association Between Stability and Swing Kinematics of Skilled High School Golfers. In: Crews D, Lutz R, editors. Science and Golf V. Proceedings of the World Scientific Congress of Golf. Mesa, AZ: Energy in motion Inc, 2008: 37-43
Click here to view the article
|
|
Explanation of Biomechanics Comparative Report
|
 |
I wrote this document as a chapter in the TPI Biomechanics Level 2 Manual. It explains all the graphs and tables in the TPI 3D Biomechanics Report for the full-body 12 Sensor AMM system. It is also applicable to the 8 and 4 sensor AMM systems and the K-Vest as well, but of course these systems wont have all the parameters that the full-body version does. (Dec 08).
Click here to view the article
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