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#44329 - 10/21/07 11:33 PM question about calluses and thumb hole fitting
vision Offline
Bumper Bowler

Registered: 05/26/05
Posts: 4
A/S/L: Albuquerque, New Mexico
I notice that some people who bowl have calluses but there's people that don't have any. When I first started as a kid I thought the thumb hole shouldn't be snug so I landed up with a callus on the base of where my thumb meets my hand but I fixed that. Now after using a thumb slug for 2 years I have a callus on top of my knuckle and to the side of my thumb. I'm bowling more this year and the callus on the knuckle of my thumb and side of my thumb gets sore. One of my questions is how do I get rid of the soreness completely and how to stop more from forming?

My other questions are, I hear everyone talking about how your thumb hole should feel and how your thumb should fit, how relaxed should my thumb be? How should my thumb feel when I put it in? Should my thumb bend at all?

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Registered: Fri Aug 27 2004
Posts: 10100
A/S/L: Mountain View, CA
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#44332 - 10/22/07 12:54 AM Re: question about calluses and thumb hole fitting [Re: vision]
Rickywin Offline
Action Bowler

Registered: 10/12/07
Posts: 204
A/S/L: 19/M/CA
It shouldn't bend at all. The thumb should be snug to the point where you can apply very little, if any, pressure to keep it from falling off your hand in the swing. If you have to grab, then grab with the web of your thumb and not the thumb itself.
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#44342 - 10/22/07 06:01 AM Re: question about calluses and thumb hole fitting [Re: vision]
CoachJim Offline
USBC Silver Coach

Registered: 09/19/06
Posts: 4665
A/S/L: Reston, Virginia USA
Unfortunately calluses are part of the game, even if you have the perfect fit, you will still have a small callus at the base of your thumb, as this is where the ball grabs ahold of your thumb. Notice I didn't say where you grab ahold of the ball, the thumb does not bend in the hole, ever.

If you insert your thumb straight in the ball, and shift it forward, you will feel the front edge of the hole lock onto the base of your thumb. If you have too much bevel, this locking point will not be there and you will need to put a new slug in with less bevel.

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#44355 - 10/22/07 11:02 AM Re: question about calluses and thumb hole fitting [Re: CoachJim]
Luksa Offline
Action Bowler

Registered: 10/12/07
Posts: 261
A/S/L: 29/M/Slovenia
CoachJim, what's your take on skin protection tape? The one you put on the back of the thumb. Should the ball catch only at the base of the thumb and not at all on the back side? (I can feel it catch on the back side as well as at the base).

I'm using the tape and have really no calluses at all. However, when I don't use it, the back side of the thumb gets a little red and tender, but the next day it's okay again.

But maybe the tape causes me to squeeze the ball, since it's much more slippery than skin?



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#44380 - 10/22/07 07:43 PM Re: question about calluses and thumb hole fitting [Re: Luksa]
Scott Gannon Offline
Hall of Famer Contender

Registered: 10/30/06
Posts: 967
A/S/L: 51/M/California
I have big time problems with my thumb and callouses on the sides. I use the Green Ebonite Protecting tape and it works great.
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Summer 2012-League Average-179, HG-224, HS-595
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#44384 - 10/22/07 07:56 PM Re: question about calluses and thumb hole fitting [Re: Scott Gannon]
Calvin Pistorio Offline
State Champion Contender

Registered: 02/19/07
Posts: 6283
A/S/L: 32/m/maryland
I don't have any callouses on my gripping fingers, just on my pinky, where there is some friction with the ball, but not much. I did at one time cut the middle finger on the ringer finger side at the crease, but I think that was from gripping tightly and a very violent release. Any other callouses are from manual labor.
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#44390 - 10/22/07 10:24 PM Re: question about calluses and thumb hole fitting [Re: Calvin Pistorio]
brettbolt Offline
Action Bowler

Registered: 10/12/07
Posts: 286
A/S/L: California
Taping my thumb and finger serves two purposes for me -- protection from calluses and improving my grip. Due to a hand injury I simply cannot bowl without tape.

The tape I use is not slippery. If I need extra grip I can use a roll of tape that was heated in my microwave oven or in my car on a hot sunny day. (Some of the adhesive melts off onto the back side of the tape).

The announcers at the Japan Cup said that many Japanese bowlers use tape too.

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#44425 - 10/23/07 04:40 PM Re: question about calluses and thumb hole fitting [Re: Luksa]
CoachJim Offline
USBC Silver Coach

Registered: 09/19/06
Posts: 4665
A/S/L: Reston, Virginia USA
Callouses on the back side of the thumb are caused by bending the thumb to hang onto the ball.

Callouses on the side of the thumb are caused by either twisting the thumb on release, or too much lateral pitch one way or the other.

Brett, they make rubber grip tape as well as the slippery tape, as well as the rubber tacky tape for the front of the hole, send me a pm and I will send you a link.


Edited by CoachJim (10/23/07 04:42 PM)

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