Training plans differ. Race days differ. But every endurance athlete fights the same battle: getting enough oxygen to the muscles that need it. These are the athletes who made GO² part of their answer — across mountains, altitudes, and the toughest single-day race on the planet.
Mountain running: Joseph Gray
Joseph Gray is a World Mountain Running Champion — a runner whose sport punishes inefficiency with every step uphill. Mountain runners live and die by breathing economy: when the grade tilts skyward, heart rate climbs and oxygen becomes the limiting factor. GO² was built for exactly that moment. Its patented breathing technology is scientifically proven to increase oxygen intake and endurance while lowering heart rate, which is why athletes like Gray put it to work on the steep stuff. When the air feels thin and the legs start asking questions, better breathing is a performance edge no split time can argue with.
High altitude: Don Bowie
Don Bowie is a professional high-altitude climber. At altitude, the air literally holds less oxygen — every breath delivers less than your body is asking for. Bowie trains with GO² because the device's entire design exists to improve oxygen delivery where it counts. If a breathing aid can earn the trust of someone who performs where the air is thinnest, it can earn its place in your training bag too.
Triathlon's toughest day: Ricardo Urbina and Laurel Wassner
An IRONMAN is a 2.4-mile swim, a 112-mile bike ride, and a marathon, back to back. Ricardo Urbina has finished 24 of them. Laurel Wassner has won three IRONMAN titles. These are athletes who measure their gear by a single standard: does it survive and deliver when you're ten hours deep and running on willpower? GO²'s numbers tell the story: endurance up by 6%, VO₂ max up by 4%, from a device that costs $60 — no batteries, no subscription, nothing that expires.
One device, every discipline
Mountain running, alpinism, and triathlon look like different sports. They share one engine: yours. Here's what makes GO² fit across all three:
- Patented technology: the only breathing device scientifically proven to increase oxygen and endurance while lowering heart rate.
- Proven results: +6% endurance, +4% VO₂ max — the kind of gains athletes usually chase for years.
- Simple to use: it fits into your routine between warm-up and the start line. No tech to babysit on race day.
- Honest price: $60. Compare that to $295+ for carbon-plated super shoes whose foam wears out in ~150 miles. GO² has no expiration date.
These athletes didn't choose GO² because of marketing. They chose it because breathing better is the most fundamental upgrade an endurance athlete can make. The science was published. The patents were granted. The device costs less than a pair of race-day socks and a gel.
Ready to breathe like the athletes who chase podiums? Get the GO² Endurance Device for $60 and put 6% more endurance into your next training block.