Endurance has a secret currency, and it isn't motivation or mileage. It's oxygen. The athletes who chase thin air at altitude and empty tanks at mile 90 of an IRONMAN all learned the same lesson: train your breathing, and everything else gets easier.
Here are four athletes who decided their lungs deserved as much training as their legs.
The Mountain Runner: Joseph Gray
Joseph Gray is a World Mountain Running Champion — a man whose office is a 13,000-foot ridgeline. Mountain running punishes sloppy breathing faster than any sport on earth: the air is thin, the grade is brutal, and your lungs have nowhere to hide. Gray's career is built on the ability to stay efficient when oxygen is scarce. The GO² endurance device was designed for exactly that problem: increasing oxygen uptake and lowering heart rate under load, so athletes like Gray can hold their pace where others fall apart.
The High-Altitude Climber: Don Bowie
Don Bowie climbs where the air holds half the oxygen of sea level. For high-altitude climbers, breathing isn't a background process — it's the entire game. Every step above 20,000 feet is a negotiation with your own lungs. Bowie's preparation is famously meticulous, and his breathing work is a core part of it. GO²'s patented technology is the only breathing device scientifically proven to increase oxygen and endurance while lowering heart rate — a profile that speaks directly to climbers fighting the thin-air penalty on every pitch.
The IRONMAN Veterans: Ricardo Urbina and Laurel Wassner
Ricardo Urbina has finished 24 IRONMAN races. Laurel Wassner is a 3x IRONMAN champion. Both know the third discipline isn't just the marathon — it's the breathing economy that carries you through hours 8, 9, and 10. When your diaphragm is competing with your legs for oxygen, efficiency wins races. Urbina's 24 finishes and Wassner's three titles share a common foundation: athletes who refuse to let their lungs become the limiter. Studies on GO² technology show endurance up 6% and VO₂ max up 4% — the kind of margin that turns a personal best into a championship.
The Common Thread
A mountain runner, a high-altitude climber, and two IRONMAN legends don't share a sport. They share a bottleneck: oxygen delivery. GO²'s doctor-designed, patented technology targets that bottleneck directly — and at $60, it costs a fraction of a single carbon-plated race shoe while working for every workout you do, season after season. No expiration date, no dead foam at 150 miles, and it's WADA legal.
Breathe Like They Do
You don't need a championship pedigree to train like one. If your lungs have been the weak link in your runs, rides, or races, it's time to give them the same attention you give your legs. Try the GO² Endurance Device today and make your next finish line a faster one.