Difference between revisions of "User:Kajmk/Sandbox"

From BowlingChat Wiki
Jump to navigation Jump to search
 
(16 intermediate revisions by the same user not shown)
Line 1: Line 1:
== Grip Test as illustrated by Don Johnson ==
 
  
This is something illustrated by Don Johnson on his first video "A Pro's Guide to Better Bowling Volume 1,
+
'''From A reply by Jim Merrell to the topic Carrydown or Depletion? What to look for'''
it is a "test" to see if the thumb-hole is too loose or too snug.
 
http://www.bowlingbookstore.com/products/94
 
  
Requirements: the ball, some bowlers tape, a tool to add or remove tape.
+
Source: http://forum.bowlingchat.net/viewtopic.php?f=20&t=13148
Caveat: the objective of this test is for the ball to drop off the thumb following an action an assistant will perform.
 
A bowler could do this solo.
 
The bowler can be standing up or kneeling down so the ball does not fall far!
 
  
Before performing the test, the bowler should check the ball to see if the ball is obviously too tight or too loose.
+
As to what to look for? It's a little more complicated than a one line answer, sorry for the long post.
Adjust the fit if needed.
 
  
Once the bowler thinks it fits well, the bowler should insert their fingers and thumb in the ball as per norm.
+
Disclaimer: none of the following is based on scientific data......just my observations over many years.
  
Next, the bowler should hold the ball down by their bowling side in a collapsed wrist position.
+
I view depletion as a reduction of something; that something being oil in the case of the bowling environment.
Definition: Collapsed wrist in this context is like you would position palm to push yourself away from the table or on the floor to do pushups.
 
The bowlers palm should be facing towards the floor and the ball should stay on because you've already checked to see if it was too loose. If it does slip off, add tape.
 
If it stays on, the assistant should position their hand on the back of the bowlers bowling hand (the flip side of the palm).
 
Now press down and straighten out the bowlers wrist.
 
If the ball stays on, the thumb is too tight ( adjust the thumb hole tape )
 
If the ball easily drops off, the fit is good, this is what we are looking for.
 
  
==Articles== 
+
'''Here's the simple explanation:'''
 +
Depletion of oil on the lane results in earlier reaction (ball could lose energy too soon....lose of down lane reaction).
  
*[[Analysis of Elite Bowlers by Bill Spigner]] ... Added 9/23/2011
+
Carry down of oil on the lane typically results in later ball reaction.
*[[Analysis of the Modern 10 Pin Swing & Release Video]]....Added 04/25/2012
 
*[[Ridenour Biomechanics|Biomechanics]]<br />
 
*[[Biomechanical terms]] ... Added 12/20/2011
 
*[[Cybervision Tapes]]
 
*[[Fundamentals of the Modern Release]]
 
*[[Lane Play Strategy for the Typical House Shot]]
 
*[[Stable Upper Body]]
 
*[[Ridenour Motion Capture|Motion Capture]]<br />
 
*[[Peak Performance Under Stress]]<br />
 
*[[Role of the Trailing Leg and Knee Continuation]]
 
*[[Shift Bowl Technique]]
 
*[[Video Capture Coaching|Video Capture Tips for Bowler Assessment / Coaching]]<br />
 
  
==Mental Game Toolbox==
+
Now for the dissertation:
  
*[[Knowledge]]
+
'''Depletion of oil'''
*[[Mastering The Competition Cycle]]
 
*[[Mental Game Toolbox]]
 
*[[The Winning Ingredients]]
 
  
==Drills==
+
'''Givens:'''
+
1) The ball is traveling at its fastest speed as it leaves the hand (facilitates skid).
*[[Free Swing Drill as detailed by Jim Merrell]] ...Added 6/28/2012
+
2) Axis Rotation is at its greatest at release (facilitates skid).
 +
3) During the balls path down the lane track flare increases exposing fresh cover stock (facilitates depletion of oil).
  
A drill useful for helping a student feel a free arm swing:
+
'''Axiom #1'''
  
'''1)''' Have them assume their address position, with the ball positioned close to the body
+
Oil depletion occurs at a greater rate in the mid lane versus the head area in my humble opinion.
  
The drill requires three non-stop repetitions:
+
'''Reason being:'''
Do A & B twice
+
1) Ball speed and axis rotation are at their greatest during the first part of the lane.
 +
2) Ball speed and axis rotation decrease in the mid lane as flare increases.
 +
3) Track flare is a contributing factor to mid lane oil depletion.
  
'''A)''' Move the arm / ball forward until the ball side elbow is at the front of the body.
+
'''Axiom #2'''
  
'''B)''' Then allow the arm to un-hinge and freely swing the ball into the back swing, returning the swing forward to their initial address position supported by both hands.
+
I had a great reaction then the heads starting hooking. Really?
  
'''C)''' On the third time begin the feet with the movement of the ball forward and make a complete approach and delivery.
+
'''Maybe not:'''
  
It's important that the tempo of the three swings is the same:
+
Depletion of oil in the mid lane moves shortens the skid zone and moves Hook Zone closer to the foul line.
Swing one, swing two and start the approach with swing three.
+
What once was a good reaction we now see the ball over reacting down lane. (slide #2)
When the ball returns to the initial staring position each time it is important to immediately start the next swing. '''Do not allow a pause!'''
 
  
The goal is to keep the swing in constant motion, synchronizing the third start with the movement of the feet.
+
The move left (right handers) is not to find more head oil, but to get the ball into the fresh oil in the mid lane restoring our original ball reaction. (slide #3)  
Most people who muscle the start (too much grip pressure) will have difficulty at first.
 
  
From a coaches stand point, I often find it necessary to position my hand between the ball and the bowler's body on the return of the second swing. Often the student will pause too long on the return of the second swing, trying to establish the feel of their normal start for the third swing.
+
'''Carry down'''
  
Having your hand positioned properly will allow you to initiate the start of the third swing and prevent a pause. If you have to initiate the start of the third swing, make sure the student just keeps the feet moving. Repetitions will ease the dis-comfort.
+
Oil picked up on the balls surface in the mid lane is re-deposited on the lane after the ball leaves the end of the oil pattern. (slide # 6)
  
== Fitness ==
+
The additional oil past the end of the pattern reduces the traction between the ball and the lane surface. Less traction….less reaction.
  
*[[7 Exercises Every Bowler Should Know]] ... added 5/26/2012
+
'''Oil depletion and carry down similarities.'''
 
+
Excessive oil depletion in the mid lane can cause the ball to progress through the Skid and Hook Stage
 +
prematurely. Turning rotational energy into translational energy too soon and the ball often hits flat.
  
'''http://www.coreperformance.com/daily/play-better/7-exercises-every-bowler-should-know.html'''
+
Carry down moves the Hook Zone further down lane, reducing the balls chances of getting into the Roll Stage. Often resulting in the ball hitting flat.
 +
 
 +
'''Thus, similar effects on ball motion down lane.'''
 +
 
 +
'''General guidelines:'''
 +
 
 +
Move feet and maybe target left ………ball reaction restored………probably dealing with oil depletion.
 +
 
 +
Move feet and maybe target left ………ball reaction not restored………change to a weaker ball and deliver another ball on the same line. Ball reaction restored……...oil depletion.
 +
 
 +
Ball reaction not restored………. possibly carry down.
 +
 
 +
Carry down………move feet and target right of the original target to get around carry down. Sometimes, this move will require balling up to a stronger cover stock.
 +
 
 +
While this may seem like a lot to digest......once familiar with the process.....it only takes several shots for me to make a decision what the athlete is dealing with....depletion or carry down.
 +
 
 +
 
 +
Put Slides after this
 +
 
 +
 
 +
[[File:1 Fresh Shot Good Ball Reaction.jpg|thumb|500px|Test phrase]]
 +
 
 +
[[Image:1 Fresh Shot Good Ball Reaction.jpg|thumb|500px|Test phrase]]
 +
 
 +
[[Image:1 Fresh Shot Good Ball Reaction.jpg]]
 +
 
 +
 
 +
[[Image:Scenario 1.jpg|thumb|left|500px|Scenario 1]]
 +
[[Image:Scenario 2.jpg|thumb|left|500px|Scenario 2]]
 +
[[Image:Scenario 3.jpg|thumb|left|500px|Scenario 3]]
 +
[[Image:Scenario 4.jpg|thumb|left|500px|Scenario 4]]
 +
[[Image:Scenario 5.jpg|thumb|left|500px|Scenario 5]]

Latest revision as of 08:49, 2 July 2017

From A reply by Jim Merrell to the topic Carrydown or Depletion? What to look for

Source: http://forum.bowlingchat.net/viewtopic.php?f=20&t=13148

As to what to look for? It's a little more complicated than a one line answer, sorry for the long post.

Disclaimer: none of the following is based on scientific data......just my observations over many years.

I view depletion as a reduction of something; that something being oil in the case of the bowling environment.

Here's the simple explanation: Depletion of oil on the lane results in earlier reaction (ball could lose energy too soon....lose of down lane reaction).

Carry down of oil on the lane typically results in later ball reaction.

Now for the dissertation:

Depletion of oil

Givens: 1) The ball is traveling at its fastest speed as it leaves the hand (facilitates skid). 2) Axis Rotation is at its greatest at release (facilitates skid). 3) During the balls path down the lane track flare increases exposing fresh cover stock (facilitates depletion of oil).

Axiom #1

Oil depletion occurs at a greater rate in the mid lane versus the head area in my humble opinion.

Reason being: 1) Ball speed and axis rotation are at their greatest during the first part of the lane. 2) Ball speed and axis rotation decrease in the mid lane as flare increases. 3) Track flare is a contributing factor to mid lane oil depletion.

Axiom #2

I had a great reaction then the heads starting hooking. Really?

Maybe not:

Depletion of oil in the mid lane moves shortens the skid zone and moves Hook Zone closer to the foul line. What once was a good reaction we now see the ball over reacting down lane. (slide #2)

The move left (right handers) is not to find more head oil, but to get the ball into the fresh oil in the mid lane restoring our original ball reaction. (slide #3)

Carry down

Oil picked up on the balls surface in the mid lane is re-deposited on the lane after the ball leaves the end of the oil pattern. (slide # 6)

The additional oil past the end of the pattern reduces the traction between the ball and the lane surface. Less traction….less reaction.

Oil depletion and carry down similarities. Excessive oil depletion in the mid lane can cause the ball to progress through the Skid and Hook Stage prematurely. Turning rotational energy into translational energy too soon and the ball often hits flat.

Carry down moves the Hook Zone further down lane, reducing the balls chances of getting into the Roll Stage. Often resulting in the ball hitting flat.

Thus, similar effects on ball motion down lane.

General guidelines:

Move feet and maybe target left ………ball reaction restored………probably dealing with oil depletion.

Move feet and maybe target left ………ball reaction not restored………change to a weaker ball and deliver another ball on the same line. Ball reaction restored……...oil depletion.

Ball reaction not restored………. possibly carry down.

Carry down………move feet and target right of the original target to get around carry down. Sometimes, this move will require balling up to a stronger cover stock.

While this may seem like a lot to digest......once familiar with the process.....it only takes several shots for me to make a decision what the athlete is dealing with....depletion or carry down.


Put Slides after this


File:1 Fresh Shot Good Ball Reaction.jpg


Scenario 1
Scenario 2
Scenario 3
Scenario 4
Scenario 5