Stronger Lungs. Better Performance. More Life.
At CoreFlex, we believe endurance wins fights, outlasts opponents, and separates the good from the elite. Whether you’re a fighter, grappler, runner, or any kind of athlete, your lungs are just as important as your muscles. If you can’t breathe, you can’t perform at your best.
The Story Behind It.
The idea for the Iron Lung Trainer came from personal experience.
I train Brazilian Jiu-Jitsu, and when I first started, I thought my strength and technique would carry me. But once the intensity ramped up, I realised something brutal—I was gassing out fast. It didn’t matter how strong or skilled I was; when my lungs gave out, so did everything else.
That frustration pushed me to look for a way to train my lungs like a muscle—to build endurance, recover faster, and stop running on empty. After testing different breathing techniques and resistance training, the difference was night and day. That’s when I knew more athletes needed this.
Our Mission.
To help athletes breathe stronger, last longer, and dominate their sport.
We’re here to change the way athletes think about endurance. Your lungs are the foundation of your stamina—train them properly, and you’ll push harder, recover faster, and go longer than your competition.
Who Is It For?
✅ Combat Athletes (BJJ, MMA, Boxing, Wrestling) – Stay explosive in the later rounds and recover faster between exchanges.
✅ Endurance Athletes (Runners, Cyclists, Swimmers) – Improve oxygen efficiency and push through fatigue.
✅ Strength & Power Athletes (CrossFit, Functional Fitness, Rugby, Football) – Build gas tank capacity for sustained high-intensity efforts.
Join the Iron Lung Revolution
We’re more than just a brand—we’re a team of athletes, fighters, and competitors who refuse to gas out. If you’re ready to take your endurance to the next level, you’re in the right place.