Most people know Bas Rutten for his liver shots. In the 1990s, he was one of the most feared strikers on the planet, a UFC Heavyweight Champion who retired on a 22-fight win streak. But the seed of his most successful business venture wasn’t planted in the octagon—it was planted in a sickbed in the Netherlands.
In his recent appearance on Y’all Street, Rutten detailed how a childhood defined by severe asthma and bullying became the R&D lab for his company, O2 Trainer.
The “Hardware Store” Prototype
Entrepreneurs often get stuck in the “analysis paralysis” phase of product development. They wait for funding, engineers, and perfect renderings. Rutten took a different approach: The MacGyver Method.
Growing up, Rutten noticed that after weeks of suffering from asthma attacks—struggling to breathe against constricted airways—his running times would paradoxically improve. He realized that the struggle to breathe was actually a form of resistance training for his diaphragm and intercostal muscles.
Years later, looking to replicate that effect without the illness, he went to a hardware store.
“It started with washers and bolts,” Rutten told Y’all Street. “I put this in front of my teeth and then started breathing in through it. I made this hole smaller and smaller.”
He didn’t have a medical degree. He had a theory and a drill. By forcing his lungs to work harder to pull in air, he created a gym for his respiratory system. This crude prototype eventually became the O2 Trainer, a sleek, manufactured device now used by endurance athletes, opera singers, and patients recovering from pulmonary issues.
Controlled Aggression in Business
Rutten’s transition from fighter to entrepreneur is underpinned by a philosophy he calls “Controlled Aggression.”
“If you have a goal, you put on your laser, and you point it at the goal. Flashlights are all over the place; laser beams are dead on.”
Bas Rutten
In the ring, if you get angry, you get sloppy. “The calm mind will beat everybody,” Rutten says. He applies this same logic to business. When he was diagnosed with heart issues later in life, or when he faced career setbacks in Hollywood, he didn’t react emotionally. He assessed the damage, adjusted the strategy, and kept moving forward.
Discipline as Self-Love
Perhaps the most striking lesson Rutten shared was his definition of discipline. In a world of “hustle culture,” Rutten reframes discipline not as punishment, but as protection.
“Discipline is the highest form of self-love,” Rutten explained. “It’s saying ‘no’ to something that you really want right now… in order to get something much better later on.”
Whether it’s skipping a second beer or rising at 4:00 AM to train, Rutten treats these choices as investments in his future self. That mindset enabled him to transform from a struggling fighter battling a painkiller dependency into a Hall of Famer, Hollywood actor, and CEO.
He didn’t just fight his opponents; he fought his circumstances. And in both arenas, he won.
Watch the full interview with Bas Rutten on Episode 21 of Y’all Street here.
SHOP the UFC Collection here & get your very own Bas Rutten Silver Round.
