Founding reservations are open. $495 with a $50 refundable deposit. Reserve yours

Origin

It started with a broken ankle and the wrong tool.

David Shoffler Sr. broke his ankle. Michael Suk repaired it.

The surgery went the way it should have. The recovery did not. Weeks into rehabilitation the standard equipment was making things worse rather than better. The wobble board slid out from under him on every repetition, and each time he caught himself the force travelled up the leg and settled in his lower back.

He was doing the exercises correctly. The equipment was the problem.

First prototype, plywood and a hinge
First prototype, plywood and a hinge

The insight

The pivot was in the wrong place.

David Sr. is a mechanical engineer. He spent his career on rotating systems, and he looked at the board he had been handed and saw an arrangement no engineer would have chosen. The axis of rotation sat on the floor, several inches below the joint it was supposed to be training.

The first prototype was plywood and a hinge, built to test whether moving the axis to the top surface changed anything. It did.

  • 2017

    First working prototype. Plywood, a hinge, and a question.

  • 2023

    US Patent 11,701,550 granted on the fixed-axis mechanism.

  • 2026

    Founding reservations open on the production unit.

The team

A surgeon, an engineer, and a coach.

Michael Suk

Co-inventor and CEO

Michael Suk, MD, JD, MPH, MBA

Orthopaedic trauma surgeon and physician executive. Twenty-five years repairing the joints this device trains.

David Shoffler Sr.

Co-inventor

David Shoffler Sr.

Mechanical engineer. Designed and patented the fixed-axis mechanism.

David Shoffler Jr.

Co-inventor

David Shoffler Jr.

Strength coach and corrective exercise specialist. Twenty years putting people back on their feet.

Sensor and firmware developed with Sperry Labs. Manufactured under ESS3 Tech, Inc.

Founding reservation

Founding price, $495.

A $50 deposit holds your price and your place in the first production run. It is fully refundable at any time before shipping, no questions asked.

$495$899

Founding price / retail

Reserve with a $50 deposit
  • $50 today. Your deposit applies to the full price.
  • When your unit is ready to ship we email you to complete the remaining $445.
  • You are never charged the balance without confirming.
  • Refundable in full at any time before shipping.

We are not giving a ship date yet. The integrated unit is still in build with our engineering partner, and a date we cannot stand behind is worth nothing to you. Your deposit holds your price and your place in line, it is refundable in full at any time, and we will not ask for the balance until we can show you a finished unit and a real date.