Increase arm speed + increase pitch speed.

**CoachFP** · 08-17-2012, 11:35 AM

Originally Posted by Screwball

I would not criticize Kempf for one section in her book. When books are written, authors always get materials from others, as she did with the routine. (Many authors have used Kempf's stuff, ironically.)

The group is Club K. I don't recommend or use the routine, because who has time? You have to take completely off from pitching for your team for 8 weeks.

When your name is on a book then what's in the book is what you believe. Otherwise whose book and teachings are they? Just because Kempf says something does not mean its right.

**sluggers** · 08-17-2012, 12:01 PM

There are studies that support that throwing overweight and underweight balls improves velocity. Here is an overview of the studies: Effects of throwing overweight balls

As far as injuries, the ASA didn't establish a blue ribbon panel of experts in physiology, anatomy and sports science to determine the optimum weight of a softball. Saying that throwing a ball one or two ounces heavier or lighter is inherently more dangerous doesn't make much sense.

**FiveFrameSwing** · 08-17-2012, 01:55 PM

Originally Posted by Screwball

I would not criticize Kempf for one section in her book. When books are written, authors always get materials from others, as she did with the routine. (Many authors have used Kempf's stuff, ironically.)

The group is Club K. I don't recommend or use the routine, because who has time? You have to take completely off from pitching for your team for 8 weeks.

The reason I wouldn't criticize Kempf for that section of her book is because the program she describes works.

**CoachFP** · 08-17-2012, 02:30 PM

What program of Kempf works? That chapter included?

**SBFAMILY** · 08-17-2012, 02:33 PM

Bill Hillhouse had some good comments on weighted balls. I consider him a good source. He posts on here all the time.

**FiveFrameSwing** · 08-17-2012, 05:11 PM

Originally Posted by CoachFP

What program of Kempf works? That chapter included?

The underload/overload program in her book.

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