![Amazon.com: Bas Rutten O2 Trainer - Official Workout Device for Respiratory Training and Lung Muscle Fitness - Portable Breathing Mouthpiece for High Altitude and Power Training (Green) : Health & Household Amazon.com: Bas Rutten O2 Trainer - Official Workout Device for Respiratory Training and Lung Muscle Fitness - Portable Breathing Mouthpiece for High Altitude and Power Training (Green) : Health & Household](https://m.media-amazon.com/images/S/aplus-media-library-service-media/5ccc7724-f0c4-4df8-a794-0cd1c6c98f2e.__CR0,0,970,300_PT0_SX970_V1___.jpg)
Amazon.com: Bas Rutten O2 Trainer - Official Workout Device for Respiratory Training and Lung Muscle Fitness - Portable Breathing Mouthpiece for High Altitude and Power Training (Green) : Health & Household
Pull No Punches Ep. 38 - Bas Rutten Addresses WBKFF Pay Scandal - BE Presents | Pull No Punches Ep. 38 - Bas Rutten Addresses #WBKFFPayScandal - BE Presents Your hosts 'Shak'
![Amazon.com: Bas Rutten O2 Trainer - Official Workout Device for Respiratory Training and Lung Muscle Fitness - Portable Breathing Mouthpiece for High Altitude and Power Training (Green) : Health & Household Amazon.com: Bas Rutten O2 Trainer - Official Workout Device for Respiratory Training and Lung Muscle Fitness - Portable Breathing Mouthpiece for High Altitude and Power Training (Green) : Health & Household](https://m.media-amazon.com/images/I/716bi7KmrHL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: Bas Rutten O2 Trainer - Official Workout Device for Respiratory Training and Lung Muscle Fitness - Portable Breathing Mouthpiece for High Altitude and Power Training (Green) : Health & Household
![Amazon.com : Bas Rutten MMA System Workout : Exercise And Fitness Video Recordings : Sports & Outdoors Amazon.com : Bas Rutten MMA System Workout : Exercise And Fitness Video Recordings : Sports & Outdoors](https://m.media-amazon.com/images/S/aplus-media/sc/035acfc1-57a6-4419-95e1-0025be63e9f9.__CR0,0,300,300_PT0_SX300_V1___.jpg)
Amazon.com : Bas Rutten MMA System Workout : Exercise And Fitness Video Recordings : Sports & Outdoors
![I've noticed a lot of MMA fighters using training masks again recently. I wondered if they actually work. What are your thoughts? Have you tried them personally? : r/MMA I've noticed a lot of MMA fighters using training masks again recently. I wondered if they actually work. What are your thoughts? Have you tried them personally? : r/MMA](https://external-preview.redd.it/gRB5kJ8qXtIBTYwe1TATfMXXK-dj8NOP-0JfDiMAhZQ.jpg?auto=webp&s=950a8b8879db54321d1e3cdd89d21594f086548b)
I've noticed a lot of MMA fighters using training masks again recently. I wondered if they actually work. What are your thoughts? Have you tried them personally? : r/MMA
![Amazon.com: Bas Rutten O2 Trainer - Official Workout Device for Respiratory Training and Lung Muscle Fitness - Portable Breathing Mouthpiece for High Altitude and Power Training (Green) : Health & Household Amazon.com: Bas Rutten O2 Trainer - Official Workout Device for Respiratory Training and Lung Muscle Fitness - Portable Breathing Mouthpiece for High Altitude and Power Training (Green) : Health & Household](https://m.media-amazon.com/images/I/61jVnhn4vxL._AC_UF350,350_QL80_.jpg)
Amazon.com: Bas Rutten O2 Trainer - Official Workout Device for Respiratory Training and Lung Muscle Fitness - Portable Breathing Mouthpiece for High Altitude and Power Training (Green) : Health & Household
![Amazon.com: Bas Rutten O2 Trainer - Official Workout Device for Respiratory Training and Lung Muscle Fitness - Portable Breathing Mouthpiece for High Altitude and Power Training (Green) : Health & Household Amazon.com: Bas Rutten O2 Trainer - Official Workout Device for Respiratory Training and Lung Muscle Fitness - Portable Breathing Mouthpiece for High Altitude and Power Training (Green) : Health & Household](https://m.media-amazon.com/images/I/61-1FVF9RjL._AC_UF350,350_QL80_.jpg)
Amazon.com: Bas Rutten O2 Trainer - Official Workout Device for Respiratory Training and Lung Muscle Fitness - Portable Breathing Mouthpiece for High Altitude and Power Training (Green) : Health & Household
Live Life Aggressively Podcast w/Mike Mahler & Sincere Hogan: EP.#124: MMA legend, Bas Rutten, returns to discuss his O2 Trainer vs other respiratory trainers, PDE's in MMA, CM Punk vs Joe Rogan,
![Amazon.com: Bas Rutten O2 Trainer - Official Workout Device for Respiratory Training and Lung Muscle Fitness - Portable Breathing Mouthpiece for High Altitude and Power Training (Green) : Health & Household Amazon.com: Bas Rutten O2 Trainer - Official Workout Device for Respiratory Training and Lung Muscle Fitness - Portable Breathing Mouthpiece for High Altitude and Power Training (Green) : Health & Household](https://m.media-amazon.com/images/I/61yB8ViC08L._AC_UF1000,1000_QL80_.jpg)