Roundbox Fitness

It may look like a stick. The movement may look like a stretch.

But the Grappler turns mobility work into active, full-body resistance training.

Instead of relaxing into a passive position, you create tension through the chest, shoulders, back, and core—building strength while moving through range.

Comment Grappler below to see how trains the entire body.

Phase 1 of my grappler shoulder mobility and joint strength

Reps and sets in comments

Really cool session today with pro squash player Salim.

I actually used to train him when he was in grade school, so it’s been awesome watching him develop over the years and now compete professionally.

Today we worked on one of our WaveBreaker “Runner” patterns.

We used an exaggerated split stance:

* front leg long and nearly straight
* back hip extended to lengthen and open up the hip flexors
* torso staying fluid while managing rotational force

From there we ran the WaveBreakers weight-side-down with the arms slightly bent and emphasized large backward ranges of motion.

One thing I really like about these patterns is that we DON’T go max effort.

We usually stay around 70% power so the athlete can:

* stay smooth
* pause and reorganize
* feel elastic deceleration
* absorb force instead of just creating it
* maintain balance and positional control while stretched into long ranges

For rotational sports like squash, it’s not just about producing force.

It’s:
how well you can decelerate,
reorganize,
and flow back into the next movement without stiffness or collapse.

That combination of mobility, elasticity, coordination, and force management is where this style of training gets really interesting.

Always fun exploring how different sports express movement and force.

Seattle-area athletes and coaches interested in this style of training, feel free to reach out.

POV: You’ve been stretching…

when you could’ve been STROTCHING. 😤

Why just stretch the chest…

when you can strengthen AND lengthen the muscles and tendons at the same time?

That’s the power of the Grappler.

Controlled resistance.
Deep ranges.
Active tension.
Pain-free mobility with strength built into the movement.

Certified Strotching Expert?
Yeah… that’s me. 😂

📍Live near Seattle and want to come strotch with me?

OR

🏠 Want to use our weird-but-awesome tools at home to STROTCH on your own?

Shoot me a message and I’ll get back to you.