Prehension Athletics

Here’s a video with more info about the hand muscles of each motor tract…

If you’re an amateur baseball player and are curious which tract you use or you want to learn how simple it is to always use motor tract 1 muscles, send me a video of an at bat or a pitching outing and attend my next free webinar and I’ll show you. (Include the footage of you getting in and out of the box or stepping onto the rubber)

Email tommy@prehensionathletics.com for a link.

The Hand Muscles of Each Motor Tract - Prehension Athletics youtu.be/LD_V2gdjLwk?is… via @YouTube

Kristian Campbell hit his 1st career HR on March 29, 2025….He signed a $60 million dollar contract 3 days after that, and was back in the minors 2 months later….

What changed so drastically in a matter of a couple of months?

The muscles holding the bat

Spring Training of 2026 on left vs 1st career HR on right

Pete Crow-Armstrong’s hips move in an open kinetic chain when he hits….

Matt Shaw’s hips move in a closed kinetic chain when he hits….

Look how different the knob moves in relation to their body as a result of it….

Anybody can learn to do what either of them does. It’s a matter of anatomy and has nothing to do with hitting.

Here’s a good look at how different the hands wrap around the bat when using the flexor digitorum superficialis vs the interossei muscles….

Gunner Henderson this year on the left vs Gunner Henderson in 2023 on the right….

When it becomes impossible to hold the bat like this on the right, you have lost the ability to use your interossei muscles to grasp the bat…

You can get them back but it takes time and a consistent effort to “wake them back up”

Both Teoscar Hernandez and Randy Arozarena use their hips in an open pack position when they hit….

Teoscar’s contracts his left psoas major first….Randy contracts his right psoas major first….

The kinetic chain takes over from there…..

Look how different their shoulders look at the finish because of it.

Learning how to select the psoas major you use when the action starts is more about your setup in the box than the physical act of moving differently.