Hitting hip and throwing inside

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May 15, 2008
1,934
113
Cape Cod Mass.
As I understand it, the primary reason for brush (of the forearm a few inches below the bend) is a reference point for accuracy. Anchoring to the same spot every time. not a collision so much as an actual brush-by, allowing a consistent location and trigger to release the ball. The wrist/hand do the work of moving the ball while coordinating with the eyes on where to locate the ball. 1 degree of change in hand (or anywhere else) position equates to 7-ish inches by the time the ball crosses the plate. You need a consistent arm reference point to allow the the wrist/hand/eye to do what they do without outside influence.
I have a problem with the idea that brush is necessary for control. Baseball pitchers don't brush. If there is brush where is the contact sensed, in the arm or the body? Some pitchers (Cat O.) where a neoprene sleeve on the elbow, in theory this would reduce the sensitivity to contact and leave the pitcher prone to wildness. Pitchers, as players, often wear sliding shorts, something else that would reduce sensitivity and cause wildness. To me brush is a sign of good mechanics but not a factor in the timing of the release.
 
Apr 5, 2009
748
28
NE Kansas
I have a problem with the idea that brush is necessary for control. Baseball pitchers don't brush. If there is brush where is the contact sensed, in the arm or the body? Some pitchers (Cat O.) where a neoprene sleeve on the elbow, in theory this would reduce the sensitivity to contact and leave the pitcher prone to wildness. Pitchers, as players, often wear sliding shorts, something else that would reduce sensitivity and cause wildness. To me brush is a sign of good mechanics but not a factor in the timing of the release.
If you think about the speed of the arm as it comes into release, I don't think it is a given that the pitcher has time to say " oh I better let go now". Instead, I agree with AWhip, that it is a sign of good mechanics with the arm being in a stable position and tracking close to the body but not the end all. I used to think brush was the platform to die on, but I've since decided that stabilizing the various joints while utilizing the correct musculature is much more important.

A person can use HE and still brush at the same location.
 
Jan 25, 2022
897
93
I have a problem with the idea that brush is necessary for control. Baseball pitchers don't brush. If there is brush where is the contact sensed, in the arm or the body? Some pitchers (Cat O.) where a neoprene sleeve on the elbow, in theory this would reduce the sensitivity to contact and leave the pitcher prone to wildness. Pitchers, as players, often wear sliding shorts, something else that would reduce sensitivity and cause wildness. To me brush is a sign of good mechanics but not a factor in the timing of the release.

I'm too lazy to read through my post, but I don't think I said brush is necessary for accuracy. Maybe it came across that way, but I don't believe that brush and accuracy are mutually exclusive. Would it make someone who doesn't brush even more accurate? I couldn't say. I do think a pitcher who has brush could recognize something has changed if they suddenly didnt have it. It's a good point of reference or maybe a box to check on your list of points to hit when assessing mechanics. Like you said, a sign of good mechanics.

I've seen plenty of reasonably accurate pitchers who have pretty rough mechanics. They've just got enough natural coordination and a million reps that they've managed to compensate with other muscles, etc.

Edit...so I just reread my post and I think I kinda did misrepresent my feelings on brush. I was more speaking to the opinion of brush proponents as opposed to myself. My bad.
 
Last edited:
Jan 25, 2022
897
93
If you think about the speed of the arm as it comes into release, I don't think it is a given that the pitcher has time to say " oh I better let go now". Instead, I agree with AWhip, that it is a sign of good mechanics with the arm being in a stable position and tracking close to the body but not the end all. I used to think brush was the platform to die on, but I've since decided that stabilizing the various joints while utilizing the correct musculature is much more important.

A person can use HE and still brush at the same location.

My clarification on brush is in my previous post back to armwhip.

But, to say a pitcher can't mentally process brush fast enough to help trigger release is like saying we can't recognize the ball hitting our glove quickly enough for the brain to signal our hand to squeeze it.

I agree about someone with a straight arm being able to brush. Brush and whip aren't mutually exclusive. I personally think that for a pitcher throwing with a straight arm, catching a bit of brush is for the best. There are a few kids I work with who are either already in lessons (and being taught straight arm circle), or are never gonna put in the time to make real mechanical changes (yet will be expected to pitch some), and that's one of a very few suggestions I'll make. Less so for a trigger and more so just so they'll find a way to get their arm in roughly the same place every time. But I absolutely do not believe brush is a requirement for accuracy.
 

sluggers

Super Moderator
Staff member
May 26, 2008
7,134
113
Dallas, Texas
Baseball pitchers don't brush. If there is brush where is the contact sensed, in the arm or the body?

There is no comparison between the amount of time a baseball/softball player practices throwing overhand with the amount of time a softball pitcher has throwing underhand.

Baseball & softball players start throwing overhand at 3 or 4 YOA. As soon as they are at t-ball, they are taught to lineup and play and catch. Then they learn to field groundballs and they overhand to 1B. As long as a kid is playing baseball or softball, they are spending at least 30 minutes of every practice throwing overhand.

Even with all that, if you start comparing college pitchers, you find that baseball pitchers have less control than softball pitchers.
 

sluggers

Super Moderator
Staff member
May 26, 2008
7,134
113
Dallas, Texas
But, to say a pitcher can't mentally process brush fast enough to help trigger release is like saying we can't recognize the ball hitting our glove quickly enough for the brain to signal our hand to squeeze it.
It's a learned somatic reflex. External stimulus (the touch of the arm on the body) triggers the release sequence. Learned somatic reflexes are everywhere in sports.

Catching a thrown ball with one hand is an example of a learned somatic reflex. Take a ball in your right hand raise it about eye level and drop it into your left hand. Your left hand has a grasping reflex. If you pay attention, you can feel the hand spring shut.
 
Jan 3, 2019
85
18
Florida
A video from the throwing arm side would be useful. If you're the catcher and the cameraman then have her make a couple of pitches into a fence so you can take video from the side, or even one from the back from just slightly to the right. Hitting the hand on the thigh is a bit unusual, typically it's the forearm that makes contact.
As requested, here's some video. She's only throwing fastballs here. As you can see in the last one video, this has been typical where the ball trails inside and down when she misses. Today we worked on walk throughs, striding straight out instead of across her powerline, trying not to force herself open, and bringing the back leg through. This really seemed to help and she regained some consistency and was able to hit inside and outside again. Still a work in progress and need to work on the glove arm though, but just trying one thing at a time. I'm still open to suggestions but I hope we're on the right path to solving this.







 
Jan 6, 2018
224
43
Now that we have the side view…I’m not concerned she’s too open, but concerned her hips are way out in front. She’s nearly completely closed at release and that’s too much. Personally I’d keep up with the walk through and other ways to get her driving a little more aggressively and leave that hip behind a tad. She’s sitting down at release and lacking much front side resistance. If she drove lower and faster she’d have to fight to stop harder.
 
May 18, 2019
292
63
While I'm at "it" and really a topic for another completely different discussion is the concept of "Brush interference" as a applied to fastpitch pitching.

The reason I bring the concept of "Brush interference" is because this player is hitting their hip as they deliver the ball. But in her case if it is her hand that is hitting her hip than she is not exhibiting " Brush interference" as its defined.

The main justification for Brush interference is the belief that it adheres to the transfer of momentum principle i.e. that slowing down of the upper arm transfers the upper on momentum to the forearm/wrist hand. This is incorrect.

By its definition brush means a collision of the upper arm and body. Any collision of two objects unless it is completely elastic decreases the overall momentum of the system because of energy that is lost in the collision process. So momentum of the overall arm system is decreased with the collision of the upper arm to the body.

What actually CAN happen and I emphasize the word "CAN" is that the total system of arm-forearm-wrist-hand is moving at the same speed just prior to the Brush. But what also is critical to this is that each segment is jointed and actually can move freely on its own. Initially it's moving as a unified system.

But when contact of the upper arm occurs to the body the upper arm slows down but because of the joint action at the elbow the forearm will change its radius of rotation from that being in unison with the upper arm shoulder joint to the elbow joint itself.

Therefore the forearm/hand will continue on with its own individual momentum which is the same as what it was before the Brush but with a totally different radius of rotation. Rotation is now occurring around the elbow joint and not the upper shoulder joint.

This is the same as what would be called the "tetherball effect". Think of a tetherball attached to a rope which is winding around a vertical pole. As the rope gets shorter the rotational speed of the tetherball increases due to conservation of its momentum.

Theoretically this is what happens with the Brush. The upper arm slows down which changes the radius of rotation of the forearm because of its joint at the elbow in the form wants to continue on with the same momentum (but higher rotational speed) it had when it was rigidly connected to the upper arm.

That being said I do not believe there is a simple collision effect that occurs with the brush. I believe there is a neural component whereby the body is telling the upper arm to slow down on its own which is occurring either as a result of the brush or in conjunction with the brush or in preparation for the brush. Again one of the integral complexities (mysteries) of how the human body nervous system functions to create goal directed movement
I literally was thinking tetherball before you got to that analogy!
 
May 15, 2008
1,934
113
Cape Cod Mass.
Excellent videos by the way. I'm looking at a little mismatch between her shoulders and her hips. She is very open with her shoulders at release, at the same time her hips are a little closed. Individually neither is necessarily a problem but together they are creating the conditions for the collision down at the release point. Her unusual glove arm action keeps her open, her soft landing pulls her hips a little closed. I would work on the landing. I see you have a couple of videos on your channel for front side leg action, 'step backs', I would try those first. If you wanted to bend the rules a little and try for a quick fix simply have her experiment with closing her landing foot more, this might keep her hips from closing as much.

I'm not sure how I feel about her unusual glove arm action, it keeps her from closing. Normally I see overly active glove arms swimming way out and I'm trying to tone it down. It's possible that it's costing her a little velocity.
 

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