Every runner has a bottleneck they can't out-train. For most of us, it's not the legs — it's the breath. The moment your breathing turns ragged, everything downstream falls apart: stride shortens, shoulders climb, and the pace you trained for slips away. GO² exists because that bottleneck was never a fitness problem. It was a design problem — and a patented one at that.
Why breathing needed a patent at all
Training your breathing muscles sounds nice in theory. In practice, most "breathing gadgets" on the market do the same thing: make breathing harder to strengthen muscles. That's resistance training for your lungs, and it has nothing to do with race day.
GO² took the opposite approach. Designed by doctors and protected by patents, it's the only breathing device scientifically proven to increase oxygen and endurance while lowering heart rate — during the run, not in some off-season gym session. The published research behind it shows real, measurable results: endurance up 6%, VO₂ max up 4%. That's not training adaptation over months. That's performance on your very next run.
What the design actually does
The GO² Endurance device works with your mouth and jaw positioning to open your airway and improve the mechanics of each breath. When your airway is working with you instead of against you, two things happen:
- More oxygen per breath. Better airflow means your working muscles get the oxygen they're demanding — exactly when they're demanding it.
- Lower cardiac cost. When breathing is efficient, your heart doesn't have to work overtime to deliver that oxygen. A lower heart rate at the same pace is the closest thing endurance sports has to free speed.
This is why the patents matter. The specific design — the geometry that positions everything to open the airway — is what separates a scientifically proven performance device from every generic breathing trinket. Copy the shape wrong and you have a paperweight. That's why copycats can't follow: the protection isn't on the idea of breathing better, it's on the engineering that actually does it.
From lab to starting line
GO²'s proof doesn't live in a lab report alone. World Mountain Running Champion Joseph Gray, pro high-altitude climber Don Bowie, 24x IRONMAN finisher Ricardo Urbina, and 3x IRONMAN champion Laurel Wassner all race with it — athletes whose livelihoods depend on the difference between finishing strong and fading late.
And because it's the real thing, it's also the legal thing: GO² is WADA legal, made in the USA, and built to last — no expiration date, no replacement cycle. For $60, you own the upgrade.
Try the engine upgrade yourself
You can spend years training your legs and still lose races to your own breathing. Or you can fix the bottleneck directly. Join the athletes who've already made the switch.