The One Thing Most Athletes Never Train: Their Breath
You periodize your miles. You dial in your nutrition. You obsess over shoes, watts, and splits. But there is a performance system you use more than 20,000 times a day and almost never train: your breathing.
At high intensity, your breathing muscles — the diaphragm and intercostals — work furiously to move air in and out. That effort has a cost. Tired breathing muscles demand more oxygen and blood flow, diverting both away from your working legs. Exercise physiologists call it the respiratory muscle metaboreflex, and it is one reason you fade in the final miles of a race even when your legs feel willing.
The GO² Endurance device changes the physics of every breath you take. It is a patented mouthpiece that gently loads each inhalation, training your breathing muscles the way resistance training builds your quads. Over time, breathing costs less effort — so more oxygen reaches the muscles that move you forward, and your heart does not have to work as hard to deliver it.
Proven Numbers, Not Promises
GO² is the only breathing device scientifically proven to increase oxygen and endurance while lowering heart rate. Published research backs two headline numbers:
- Endurance improved by 6% — a margin that turns a close race into a personal record.
- VO₂ max increased by 4% — the single most important marker of aerobic capacity.
Six percent may not sound dramatic until you do the math on a marathon: that is roughly ten minutes off a four-hour finish. It is the difference between the podium and the pack.
Designed by Doctors, Trusted by Champions
The technology is patented and was designed by doctors — not repackaged as another gadget with a big marketing budget. It simply works, quietly, breath after breath. Elite endurance athletes across disciplines rely on it:
- Joseph Gray, World Mountain Running Champion, on the steepest climbs in the sport.
- Don Bowie, professional high-altitude climber, where thin air punishes every breath.
- Ricardo Urbina, 24-time IRONMAN finisher, and Laurel Wassner, 3-time IRONMAN champion, across 140.6 miles of swim, bike, and run.
One Device. Every Workout.
There are no subscriptions, no batteries, no firmware updates. Wear it while you train, and your breathing muscles get stronger while race day gets easier. At $60, it costs a fraction of the gear athletes routinely buy for a fraction of the gain — and it never expires, wears out, or needs replacing on a schedule.
Your lungs are the engine room of endurance. It is time you trained them.
Ready to breathe like a champion? Get the GO² Endurance device here and start building your strongest breath today.