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 Post subject: Brown Burn markings on tip of thumb
 Posted: Thu May 06, 2010 9:41 am Post Number: #1 Post
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What causes these brown "burn" marking on the thumb?

Is it a span/pitch problem?
Is it fault of the bowler ?

Any help would be appreciated.

Thanks


Last edited by huntweener on Sun May 09, 2010 7:44 pm, edited 2 times in total.

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 Post subject: Re: Brown Burn markings on tip of thumb
 Posted: Fri May 07, 2010 8:04 pm Post Number: #2 Post
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Mo Pinel
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huntweener wrote:
What causes these brown "burn" marking on the thumb?

Is it a span/pitch problem?
Is it fault of the bowler ?

Any help would be appreciated.

Thanks


Almost always it's a span/pitch problem. It depends on where it is as to its cause. Post a picture, please.


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 Post subject: Re: Brown Burn markings on tip of thumb
 Posted: Sun May 09, 2010 7:37 pm Post Number: #3 Post
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Thank You for solving my posting problem!

Back to topic:

It seems all three of them have the burn on the same spot
All of them are 17-18 year old.
Sorry for the bad quality pictures, i took these during today League Champs.

http://picasaweb.google.hu/110125386662563250056/BowlingchatForum#

Hope its visible where they have the marks, they don't feel pain worth mentioning, but I think the problem could cause also some release issues as well. Grabbing etc...

Monday or Tuesday I will look at their drill sheets and can post them here if it helps.


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 Post subject: Re: Brown Burn markings on tip of thumb
 Posted: Tue May 11, 2010 5:54 pm Post Number: #4 Post
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huntweener wrote:
Thank You for solving my posting problem!

Back to topic:

It seems all three of them have the burn on the same spot
All of them are 17-18 year old.
Sorry for the bad quality pictures, i took these during today League Champs.

http://picasaweb.google.hu/110125386662563250056/BowlingchatForum#

Hope its visible where they have the marks, they don't feel pain worth mentioning, but I think the problem could cause also some release issues as well. Grabbing etc...

Monday or Tuesday I will look at their drill sheets and can post them here if it helps.


It, also, looks to me like the marks are in similar spots on all three of the thumbs. My initial thoughts are:
1) Long middle finger span
2) Thumb hole shape (needs an oval or custom thumb hole)


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 Post subject: Re: Brown Burn markings on tip of thumb
 Posted: Wed May 12, 2010 9:01 am Post Number: #5 Post
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Two of them use the oval inserts from Vise , the third has more of a round thumb so I drilled a round hole and took a minimal amount from the sides.

Since I drilled the balls for them I don't think the span of middle finger is long, but that's why I asked the question in the first place, because I think somethings not right. :)

What should be my next step correcting the issue?

I put some videos of them here:
http://www.youtube.com/user/huntweener


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 Post subject: Re: Brown Burn markings on tip of thumb
 Posted: Tue Jun 08, 2010 8:22 am Post Number: #6 Post
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I actually have the same burn mark on my thumb in about the same location. Mo's suggestion of a long middle finger span seems possible since I believe mine is a little long.

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 Post subject: Re: Brown Burn markings on tip of thumb
 Posted: Wed Jun 23, 2010 5:22 am Post Number: #7 Post
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I wonder if it's caused by squeezing as well.


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 Post subject: Re: Brown Burn markings on tip of thumb
 Posted: Wed Jun 23, 2010 7:39 am Post Number: #8 Post
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Well it certainly could cause it, but I prefer to have a little test with the players to see if the thumb hole is too big or not.
I ask them to lay the ball on the ground, put all the fingers inside the ball and let them pick up the ball so that they just stand up and have the hand remain relaxed.
This way if the thumb hole is too big, the ball never gets from the ground because the thumb slips out immidiately. If the ball is hanging on the fingers without any grip pressure I assume the hole is fine. If I ask them to move the wrist in a release position ( wrist about straight ) the ball usually drops from thumb. If not then its time to get out tape or in some cases for more bevel.

Does this makes sence?


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 Post subject: Re: Brown Burn markings on tip of thumb
 Posted: Thu Jun 24, 2010 5:02 am Post Number: #9 Post
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"If I ask them to move the wrist in a release position ( wrist about straight ) the ball usually drops from thumb. If not then its time to get out tape or in some cases for more bevel."

All of that makes sense to me except the above. I'm just not completely clear. Are you saying if the ball doesn't drop when you do this, the hole is too tight?

Also when they pick up the ball do they just let the hand lay in there or do they "open the hand" or anything like that?


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 Post subject: Re: Brown Burn markings on tip of thumb
 Posted: Fri Jun 25, 2010 8:45 am Post Number: #10 Post
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The hand is in the ball and have to be relaxed, you just pick it up from the floor by raising your body.
Tha ball should hang on your fingers and thumb - and wrist is in a relaxed-broken position . The ball drops from the thumb when you change the wrist position is beacuse the angle of pressure on the thumb changes. (at least I think so)

Thats why the angle in the thumbhole is so important I think. When you have too much reverse according your span, the thumb wants to slip off even if your thumbhole is relatively snug.

Hope somebody more konowledgeable chime in to stop me if I'm saying nonsense :)


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