Forearm fire and Internal Rotation

the term "internal rotation" as it applies to underhand pitching
is about delaying the inward turning of the upper arm (humerus) and then the lower arm (radius/ulna).

To make a windmill motion to pitch a ball, "internal rotation" (of both upper and lower arm) has to happen.
You can't really make an arm circle without it happening.
The important consideration is when it happens.

The "palm up" position we strive for at the 10:00-9:00 position in the arm circle,
has everything to to with delaying inward rotation of the humerus,
and not much at all to do with the radius/ulna.
(internally rotating the Radius/Ulna while holding an externally rotated Humerus, behind you at 9:00 is probably possible, but pretty awkward...)

Once the ball passes 10:00-9:00 everything happens pretty quickly,
but the internal rotation of the upper arm (humerus) generally very slightly precedes
the internal rotation of the forearm (radius/ulna) which occurs last in the kinetic chain
at the very bottom of the arm circle and just before release of the ball.

All of that "stored energy" of delaying internal rotation of both upper and lower arm,
is what contributes to greater speed AND spin.

The "Forearm Fire" guy was hyper-fixed upon the lower arm,
but that is only one part of the kinetic chain we are interested in.

Doesn't Mr. Hillhouse teach the ball pointing towards third and forearm bush across you belly button?

Tango said:

Doesn't Mr. Hillhouse teach the ball pointing towards third and forearm bush across you belly button?

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Mr. Hillhouse is a fairly accomplished pitcher.

FYI, the natural action of the arm socket does direct the ball towards 3B for a RH pitcher ... it is the torso action, along with tension level, that redirects the ball more skyward.

FiveFrameSwing said:

Mr. Hillhouse is a fairly accomplished pitcher.

FYI, the natural action of the arm socket does direct the ball towards 3B for a RH pitcher ... it is the torso action, along with tension level, that redirects the ball more skyward.

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I personally think towards third is fine and skyward. From my experience some kids have pain when skyward and I know I'll get ripped for this.

Palm up creates the maximum ability to internally rotate to generate the most speed with the whip. Towards third works by is only half as good as palm to sky

Take note of the torso action leading to the palm-up orientation.

I find it odd the Euno plants her foot with her toes essentially pointing at the plate...but who am I to judge someone who throws in the mid 70s lol kinda just goes against the 45° that girls are taught from a young age. Why is that? Maybe due to the way she fires her hips earlier than most?

If you look at Ueno closely you will see she is actually pointing more towards 3rd at 1200 then kind of flips her arm into the skyward position at 900.

I do appreciate that the Forearm Fire guy makes his videos easily accessible, free, and he does a very good job of making his lessons digestible.

If his methods are correct 100% of the time, I have no idea. But lots of it does agree with lots of what I read here.

StormChase said:

I find it odd the Euno plants her foot with her toes essentially pointing at the plate...but who am I to judge someone who throws in the mid 70s lol kinda just goes against the 45° that girls are taught from a young age. Why is that? Maybe due to the way she fires her hips earlier than most?

Click to expand...

Observe how her foot was orientated to 45-deg just before landing, but then corrects. That correction was one thing a poster here spoke of as a speed contribution.