http://www.youtube.com/watch?v...TPsM&feature=related
Interesting video discussing hip rotation.
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Who is the MLB player used in the study?
quote:Originally posted by Jimmy33:
http://www.youtube.com/watch?v...TPsM&feature=related
Interesting video discussing hip rotation.
Yes! I love common sense, nickel word descriptive terminology.
Not at all what you get in hitting discussions here.
The MLBer happens to be Ryan Adams of the Baltimore Orioles--He was one of the players that gave permission to use his name/likeness..
Although styles may differ the biomechanics of pelvic rotation remain constant.
Even the bug-squisher uses the legs working against the ground to open the hips--we just see FAR less contribution with regard to "leg-drive" (measured by Ground-reaction-Forces) in the back-leg of the bug-squisher.
In these "throw-like" activities the pelvis is driven open by the legs working/driving/pushing/pressing against the ground. Our goal is to maximize the effectiveness of this "leg-drive".
Focusing on spinning legs/feet or trying-to spin/rotate will reduce the effectiveness of these actions.
Although styles may differ the biomechanics of pelvic rotation remain constant.
Even the bug-squisher uses the legs working against the ground to open the hips--we just see FAR less contribution with regard to "leg-drive" (measured by Ground-reaction-Forces) in the back-leg of the bug-squisher.
In these "throw-like" activities the pelvis is driven open by the legs working/driving/pushing/pressing against the ground. Our goal is to maximize the effectiveness of this "leg-drive".
Focusing on spinning legs/feet or trying-to spin/rotate will reduce the effectiveness of these actions.
http://www.youtube.com/watch?v=Z-wb9SnNJRI
Dr. Yeager,
Can you share the conditions of testing? Dry swings, tee swings, BP, game speed?
Can you share the conditions of testing? Dry swings, tee swings, BP, game speed?
bp--maybe 50mph
Maybe I'm too simple to understand it. I always thought the whole point of teaching "rotation" was to get the big muscles (core) involved in generating the power?
In other words (and I'll probably screw up the wording) loading up the big muscles, then uncoiling the big muscles and initiating the move to the zone with their body not their hands.
In other words (and I'll probably screw up the wording) loading up the big muscles, then uncoiling the big muscles and initiating the move to the zone with their body not their hands.
Dr Yeager,
I hate to even open this can of worms but please verify that your approach and theories more closely align with linear hitting theories versus the now common rotational hitting theories taught by most instructors today. The hips sliding/driving forward would more closely align with linear hitting philosophies if I understand correctly.
I hate to even open this can of worms but please verify that your approach and theories more closely align with linear hitting theories versus the now common rotational hitting theories taught by most instructors today. The hips sliding/driving forward would more closely align with linear hitting philosophies if I understand correctly.
The rotational hysteria that has taken place over the past 10-12 years has replaced the productive driving action of the back leg with an unproductive spinning action.
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Dr. Yeager,
Do you believe the motion capture on Adams is an accurate representation of his game swing?
Do you believe the motion capture on Adams is an accurate representation of his game swing?
Once the front heel drops the "linear" movement of the body's "weight" must stop. i.e at that point the center-of-gravity is stabilized and the swing should become "rotational"....BUT not until AFTER the back leg has made a lateral shift/press, driving energy into the direction of the pitch.
The purely "rotational" coaches have eliminated the driving action of the back leg.
Because:
1.They do not understand the basic biomechanics behind pelvic rotation.
2.The do not understand the purpose of the stride.
The purely "rotational" coaches have eliminated the driving action of the back leg.
Because:
1.They do not understand the basic biomechanics behind pelvic rotation.
2.The do not understand the purpose of the stride.
yes bobby..
Concern yourself less with stylistics and focus on the biomechanical absolutes of human movement.
Concern yourself less with stylistics and focus on the biomechanical absolutes of human movement.
quote:Originally posted by Dr. Chris Yeager:
yes bobby..
Concern yourself less with stylistics and focus on the biomechanical absolutes of human movement.
I'm not trying to be a jerk, but my questions about IsoBaseball that have nothing to do with style. The question about game swing vs BP swing is that the movement patterns he shows are different. The barrel paths are different. In my opinion, there are different things going on and I'm concerned about which biomechanical absolutes of human movement are being used in BP vs game.
The Martial Arts have taught, for near 2000 years, that leg leverage against the ground is the key ingredient necessary to generating rotational power. One wouldn't dare to attempt breaks of human bones, or wood, or for sure cement blocks without mastering that fundamental "secret."
As you say Dr. Yeager, it's no different in any athletic endeavor. It's been amusing to me, and frustrating at times, to hear many argue that there is not or should not be any linear movement in the high level major league swing. Rotation training has gone awry.
I guess they didn't take Physics in High School or College.
As you say Dr. Yeager, it's no different in any athletic endeavor. It's been amusing to me, and frustrating at times, to hear many argue that there is not or should not be any linear movement in the high level major league swing. Rotation training has gone awry.
I guess they didn't take Physics in High School or College.
Prime9 "As you say Dr. Yeager, it's no different in any athletic endeavor. It's been amusing to me, and frustrating at times, to hear many argue that there is not or should not be any linear movement in the high level major league swing. Rotation training has gone awry."
Yes--it is as if "hitting" exists in a world apart from all other athletic events.
The “rotational hysteria” that has taken place over the past 10-12 years has, among other things, has COACHES attempting to ELIMINATE the driving force of the back leg—and replacing it with a spinning action.
Rotation is a MEANS by which the human-body can transfer/amplify energy—but Rotation should not be our goal. Transferring maximum energy to the baseball should be.
http://www.youtube.com/watch?v...ture=player_embedded
Yes--it is as if "hitting" exists in a world apart from all other athletic events.
The “rotational hysteria” that has taken place over the past 10-12 years has, among other things, has COACHES attempting to ELIMINATE the driving force of the back leg—and replacing it with a spinning action.
Rotation is a MEANS by which the human-body can transfer/amplify energy—but Rotation should not be our goal. Transferring maximum energy to the baseball should be.
http://www.youtube.com/watch?v...ture=player_embedded
quote:Originally posted by Dr. Chris Yeager:
has COACHES attempting to ELIMINATE the driving force of the back leg—and replacing it with a spinning action.
I was not aware that instructors promoted a "spinning action". Who are these coaches?
Here here Yeager!
quote:was not aware that instructors promoted a "spinning action". Who are these coaches?
Consider yourself fortunate Sultan...
Primarily the Bug-squish coaches
and
the "get the foot-down-early" then "rotate-your-hips (by internally rotating the back leg/foot) coaches.
While I agree 100% about the drive off the back leg in the stride phase and the energy being pushed into the ground, I do have to say that in most (not all) good swings that the front hip goes backwards to some degree.
http://www.youtube.com/user/la...in#p/u/5/MV9ssAuLE4o
http://www.youtube.com/user/la...#p/u/254/UePaVubPpIs
Look at the belt loop on Cabrera's and Laird's left hip. They clearly go backwards.
http://www.youtube.com/user/la...in#p/u/5/MV9ssAuLE4o
http://www.youtube.com/user/la...#p/u/254/UePaVubPpIs
Look at the belt loop on Cabrera's and Laird's left hip. They clearly go backwards.
Rotation is a MEANS by which the human-body can transfer/amplify energy—but Rotation should not be our goal. Transferring maximum energy to the baseball should be.
Dr. Yeager's summary sentence above is as about as direct as one can get on this topic.
While I agree 100% about the drive off the back leg in the stride phase and the energy being pushed into the ground, I do have to say that in most (not all) good swings that the front hip goes backwards to some degree.
True, because the laws Of Physics say so!
Dr. Yeager's summary sentence above is as about as direct as one can get on this topic.
While I agree 100% about the drive off the back leg in the stride phase and the energy being pushed into the ground, I do have to say that in most (not all) good swings that the front hip goes backwards to some degree.
True, because the laws Of Physics say so!
Yes, but in Dr. Yaeger's video he states that the front hip does not go backwards, it stays in place. I do not see this action in most good swings. I agree with all other points on energy transfer and that this rotation is an effect and not a cause of action, but I don't think that it would be accurate to say that the front hip does not have motion away from the pitcher.
Good hitters do not block with the front leg to get the hips to turn. They do not directionaly drive forward and then plant the stride foot and then rotate.
The forward movement is not stopped when the lead leg is planted.
The forward movement is not stopped when the lead leg is planted.
The debate lives on... this from a few years ago.
Hip/Rotational Swing Thread
The more things change, the more they stay the same.
GED10DaD
Hip/Rotational Swing Thread
The more things change, the more they stay the same.
GED10DaD
quote:Originally posted by swingbuilder:
Good hitters do not block with the front leg to get the hips to turn. They do not directionaly drive forward and then plant the stride foot and then rotate.
The forward movement is not stopped when the lead leg is planted.
that rear foot says the move,,see it lose the grip and spin out? good clip
quote:Originally posted by wogdoggy:quote:Originally posted by swingbuilder:
Good hitters do not block with the front leg to get the hips to turn. They do not directionaly drive forward and then plant the stride foot and then rotate.
The forward movement is not stopped when the lead leg is planted.
that rear foot says the move,,see it lose the grip and spin out? good clip
Ding Ding Ding! We have a winner!
quote:Originally posted by Low Finish:quote:Originally posted by wogdoggy:quote:Originally posted by swingbuilder:
Good hitters do not block with the front leg to get the hips to turn. They do not directionaly drive forward and then plant the stride foot and then rotate.
The forward movement is not stopped when the lead leg is planted.
that rear foot says the move,,see it lose the grip and spin out? good clip
Ding Ding Ding! We have a winner!
20 years ago and everyone would be talking about how bad "the hitch is in his swing and how it will affect performance as he ages and his bat slows."
Another day, another story.
Guys still talk about the "hitch" being bad. Though many great hitters do it.
A big key is that just before he initiates his swing, he loads his rear elbow/arm to "throw" the barrel through the ball.
He opens up his armpit just as he would to throw a baseball.
He opens up his armpit just as he would to throw a baseball.
He has great connection of his lower and upper back side during his swing. His rear elbow/arm and rear knee/leg begin driving at the same time as he launches.
