Why “Sit in Your Legs” Breaks Half Your Lineup

Late afternoon. A batting cage, a bucket of balls, a 14U hitter taking front toss. Her coach, a good one who cares, keeps calling it from behind the net: "Sit down. Get in your legs. You're leaking."

She does exactly what she's told. She sinks deeper, loads heavier, grinds through another round. And she gets slower. The bat that felt alive ten minutes ago now drags through the zone like she's swinging underwater. The harder she works at the cue, the worse it looks.

Everyone in that cage is trying, and nobody is getting better.

I know that scene because I've been that coach. I coached my own daughter, Rylee, with cues just like these. Learning Motor Preferences, and I'm still learning, has changed how I see it.

The question underneath

Here's what finally got my attention. The same cue, in the same cage, from the same coach, can build an All-American out of one hitter and bury another. "Sit in your legs" is gold for one athlete and sand in the gears for the next.

So who's wrong? Not the coach. Not the athlete. The cue simply wasn't written for her body.

Two engines, in plain English

Motor Preferences is the lens I use to explain the gap, and I want to be clear about where it comes from. I didn't develop it. I learned it through Motor Preference Experts (MPE), where I'm certified in Motor Preferences Softball, and I'm still early in this journey myself. What you're reading is my attempt to translate what I'm learning into words a coach, a player or a parent can use. Where I get it right, the credit belongs to them. Where I get it wrong, that's on me.

I came to Motor Preferences with a kinesiology degree from the University of Texas at Austin. A lot of what I studied back then about how people move suddenly had a framework to hang on. It didn't replace what I learned. It connected it.

It starts with one observation: athletes organize force in two different ways, and most coaching language quietly assumes there's only one.

Aerial athletes run on a spring. Think mass-spring engine. Their pressure lives toward the forefoot, they rebound off the ground, and the movement flows at a continuous tempo with no hard stop between load and fire.

Terrestrial athletes run on levers and pulleys. They anchor into the ground, feel heavy through the heel, bend deep through the joints, and push in sequence: load, settle, drive, one segment after another.

Same sport, same swing, two different machines. Neither is better. They're two ends of a continuum, not two boxes, and plenty of athletes sit somewhere between. What matters is that they're built differently, and the cue has to match the build.

What actually breaks

Tell an Aerial hitter to sit, and as I understand it, three things tend to go wrong at once.

1. Her center of pressure slides backward. Balance moves toward the heels, away from the forefoot where her body organizes force.
2. The spring goes dead. The stretch-shortening cycle is the quick stretch-then-rebound that lets muscle return stored energy, the way a spring gives back what you press into it. Sink deep and pause, and the rebound turns into a dead stop. Energy bleeds out instead of coming back.
3. The brakes come on. Antagonist muscles, the opposing group, fire to protect the joint in a position it doesn't trust. She's trying to accelerate while part of her body is slowing her down.

Three rules for the cage

You don't need a lab to use this. You need better questions.

1. Separate outcome from appearance. Judge the ball off the bat, the timing, the bat speed. Not whether the load matches the picture in your head. A pretty setup is not proof of a good swing.
2. Treat every cue as a hypothesis. "Sit" is a test, not a law. If she feels stuck or heavy within a few swings, test the opposite polarity: lighter, more spring, pressure toward the forefoot. Let her answer count as data.
3. Look at the feet. Before you say anything about the legs, watch where her balance naturally lives when she isn't thinking about it: walking to the box, in the warm-up, waiting on the pitch. Forefoot or heel will tell you which engine you're coaching.

Where this comes from, and where it's headed

Motor Preferences grew out of biomechanics research at the Volodalen Lab in France, where Cyrille Gindre is credited with the concept and Thibault Lussiana led the first research. MPE represents that work in North America, and its co-founders, Matt Swope and David Genest, have brought it into baseball and softball. To learn more, visit Motor Preference Experts.

Motor Preferences is still young in softball, and I'm still learning how it applies to the game. The research behind it started with runners, and softball is only now catching up to the work happening in the field. A small recent study of Division II hitters saw bat speed rise after profile-based training, an encouraging early sign. That's why I treat Motor Preferences as a lens to test with each athlete, not a rule to enforce.

The lens, not the label

One last thing, because it matters. Motor Preferences is an interpretive lens. It is not a diagnosis, and it is not a label to hang on a kid. It's a way of asking a sharper question about how an athlete moves, then checking the answer against what you see and what the data says.

Hold it loosely. Test it honestly. And remember what no cue, no stat line and no label can replace.

Every athlete has a signature. If you want help reading yours, start here.