I bumped this thread awhile back but thought I would cut and past and create a new thread as a focus on the wrist and its importance. Just when you think you have everthing down from drive, to brush, to ball at 9:00, and IR, a very small difference in the angle of wrist can make a huge difference in speed. See @BoardMember posts below:
Side note on this topic.... many times we teach all kinds of different change-ups and eventually a girl will find one that works well for her. My question is how many times did we teach a regular fastball grip but simply throwing with wrist extension instead of flexion? Again, read @BoardMember posts below.
S3
Mar 31, 2013
[IMG alt="Amy in AZ."]https://www.discussfastpitch.com/data/avatars/l/0/44.jpg?1556044865[/IMG]
Amy in AZ.
May 7, 2008 8,506 48 Tucson
The above study was in 2002. I can't figure out why wrist flexion would be 32%. A wrist snap doesn't even occur.
MTR - A foul ball is a foul ball. Nothing else, just a foul ball.
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Mar 31, 2013
[IMG alt="BoardMember"]https://www.discussfastpitch.com/data/avatars/l/0/551.jpg?1554646344[/IMG]
BoardMember
Jul 14, 2008 1,794 63
Shoulder extension occurs when the humerus moves from behind you to neutral, then forward AFTER delivery...........DUH........What an epiphany to know that "completion of the arm circle from back to front" is the biggest contributor..........
Wrist flexion occurs in almost, but not every pitch delivered.........It is a force generator as the wrist moves from slightly extended or neutral to flexion through release........Wrist Flexion on it's own is a fairly weak contributor of force.......However.......Combined with INternal Rotation, wrist flexion/IR creates a "force couple" which exerts torque on the delivery system.........
This is INternal Rotation, combined with wrist flexion.........Creating torque..........
Even in my 9:00 drill I'm combining shoulder extension WITH INternal Rotation and wrist flexion to propel the ball........
One of the biggest issues one faces when teaching I/R is LACK of wrist flexion during the I/R release........This is what you see when inexperienced I/R mechanics appear to be strictly "Arm Roll"........
Last edited: Mar 31, 2013
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Mar 31, 2013
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BoardMember
Jul 14, 2008 1,794 63
As a side note.........MANY change ups are achieved by EXtending (lifting) the wrist through release vs. flexing the wrist during release.......
This is the exact opposite of the move that generates force which is flexion. It in fact, shuts down the force couple and takes force OUT OF the system........
Most flip changes......Back Door Changes........Horseshoe Changes.........All RELY on WRIST EXTENSION to take force/velocity from the delivery.........
Watch Michelle EXTEND her wrist during her flip change........
Side note on this topic.... many times we teach all kinds of different change-ups and eventually a girl will find one that works well for her. My question is how many times did we teach a regular fastball grip but simply throwing with wrist extension instead of flexion? Again, read @BoardMember posts below.
S3
Mar 31, 2013
[IMG alt="Amy in AZ."]https://www.discussfastpitch.com/data/avatars/l/0/44.jpg?1556044865[/IMG]
Amy in AZ.
May 7, 2008 8,506 48 Tucson
The above study was in 2002. I can't figure out why wrist flexion would be 32%. A wrist snap doesn't even occur.
MTR - A foul ball is a foul ball. Nothing else, just a foul ball.
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Mar 31, 2013
[IMG alt="BoardMember"]https://www.discussfastpitch.com/data/avatars/l/0/551.jpg?1554646344[/IMG]
BoardMember
Jul 14, 2008 1,794 63
Shoulder extension occurs when the humerus moves from behind you to neutral, then forward AFTER delivery...........DUH........What an epiphany to know that "completion of the arm circle from back to front" is the biggest contributor..........
Wrist flexion occurs in almost, but not every pitch delivered.........It is a force generator as the wrist moves from slightly extended or neutral to flexion through release........Wrist Flexion on it's own is a fairly weak contributor of force.......However.......Combined with INternal Rotation, wrist flexion/IR creates a "force couple" which exerts torque on the delivery system.........
This is INternal Rotation, combined with wrist flexion.........Creating torque..........
Even in my 9:00 drill I'm combining shoulder extension WITH INternal Rotation and wrist flexion to propel the ball........
One of the biggest issues one faces when teaching I/R is LACK of wrist flexion during the I/R release........This is what you see when inexperienced I/R mechanics appear to be strictly "Arm Roll"........
Last edited: Mar 31, 2013
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Mar 31, 2013
[IMG alt="BoardMember"]https://www.discussfastpitch.com/data/avatars/l/0/551.jpg?1554646344[/IMG]
BoardMember
Jul 14, 2008 1,794 63
As a side note.........MANY change ups are achieved by EXtending (lifting) the wrist through release vs. flexing the wrist during release.......
This is the exact opposite of the move that generates force which is flexion. It in fact, shuts down the force couple and takes force OUT OF the system........
Most flip changes......Back Door Changes........Horseshoe Changes.........All RELY on WRIST EXTENSION to take force/velocity from the delivery.........
Watch Michelle EXTEND her wrist during her flip change........