Testimonials – Bas Rutten – Official Site


April 12, 2019

Bas Rutten O2 Trainer Review | Jersey Beast TV | Lopez Strength and Conditioning

April 11, 2019

David B., Cyclist Racer

Like I had mentioned I’m an cyclist racer and have been competing for over 20 yrs .. And as I have gotten older I know we […]
April 11, 2019

Exclusive Duane Bang Ludwig UFC on Versus 5 Video Blog: Training

Duane “Bang” Ludwig is training for the biggest fight of his career… against Amir Sadollah at UFC on Versus 5. In his exclusive http://MMAWeekly.com video blogs […]
April 11, 2019

Art Of Eight Training & Fitness

Art Of Eight Training & Fitness introduces Bas Rutten and his patented O2 Trainer! Proper breathing is a must for any competitor or athlete. The O2 […]
April 11, 2019

Kenneth B.

Dear Bas Rutten,I wanted to tell you how impressed I am with your O₂ Trainer. Since purchasing it, I have used it with my Krav Maga […]
April 11, 2019

Frank B. Wyatt,Ed.D., Associate Professor Department of Athletic Training & Exercise Physiology

One thing I can state is that with the first run of statistics, the ventilation improved significantly. Your original claims of increased ventilatory muscles were correct. […]
April 5, 2019

Josef Harris (verified buyer)

“This has helped my fitness to no end 10/10 would recommend very sturdy and adaptable to all fitness levels.”
March 22, 2019

Al (verified buyer)

“This thing is rough, working out with an o2 trainer, is not only good for your stamina, but it also helps your mental grit.”
March 22, 2019

Ken Bak (verified buyer)

“I have used the O2 Trainer since it’s release and am quite impressed with it. I use it for Krav Maga and Law Enforcement training. It […]