o2 Trainer Bas Rutten

The O2 Trainer Bas Rutten is a revolutionary breathing device designed to strengthen your respiratory muscles and increase cardio output. Developed by MMA legend Bas Rutten, this compact tool helps athletes improve endurance, lung capacity, and breathing control during training and competition. Whether you’re a striker, grappler, or general fitness enthusiast, the O2 Trainer makes every breath work harder for you.

Small enough to fit in your gym bag, yet powerful enough to change the way you train, this tool is trusted by fighters, runners, swimmers, and high-performance athletes worldwide.

O2 Trainer Bas Rutten Key Features

• Adjustable airflow resistance to increase training intensity
• Designed by UFC Hall of Famer Bas Rutten for functional combat fitness
• Strengthens your diaphragm and other breathing muscles
• Improves stamina by making your lungs more efficient
• Compact and lightweight — perfect for use anytime, anywhere
• Ideal for MMA, boxing, running, BJJ, and HIIT training
• Multiple resistance caps included to scale difficulty
• Helps reduce fatigue during intense training rounds
• Backed by real-world results and endorsed by elite athletes
• Includes hygienic carry case and easy-to-follow instructions

Train Your Lungs Like a Muscle

The O2 Trainer limits the airflow you take in, forcing your lungs and diaphragm to work harder with every breath. As you build this respiratory strength, your body becomes more efficient at oxygen intake and recovery. Over time, this leads to noticeable improvements in performance, endurance, and output — especially during hard rounds or cardio sessions.

Pro-Level Performance, Everyday Use

You don’t need a high-tech setup to use this tool. Whether you’re warming up, shadowboxing, running outdoors, or even walking, the O2 Trainer adds a layer of challenge to your normal breathing. It’s an easy way to level up your conditioning — no gym required.

Trusted by Bas Rutten and Top Athletes

Bas Rutten designed this tool based on his own experience fighting at the highest level. Today, athletes across multiple disciplines rely on the O2 Trainer to gain a competitive edge. If you’re looking to breathe better, last longer, and train smarter, this is the tool to add to your routine.

UK Delivery Options

• Standard Delivery (Royal Mail Tracked 48): FREE – 3–5 working days
• Premium Delivery (Royal Mail Tracked 24): £5.00 – 1–2 working days
• BFPO Delivery (Royal Mail): FREE – Standard Service

Order Cutoff

Please place your order before 3 pm (Monday–Friday) for same-day dispatch. Orders placed after 3 pm or on weekends / bank holidays are dispatched the next working day.

International Delivery

• Royal Mail Tracked: £9.99 per order (Europe: 3–5 days / Rest of World: 9–14 days)
• DHL Express: Europe 1–2 days / Worldwide 2–5 days
• Any applicable customs charges must be paid by the buyer.

Returns & Exchanges

• UK Exchanges: Free of charge
• UK Refunds: Accepted on eligible items
• International Returns: Return postage paid by the customer

Pickup in Store

Choose Collect In-Store at checkout to collect your order from our Aylesbury or Waterloo (London) location. Standard collection is usually 3–5 business days.

• Please bring your order confirmation and a photo ID.
• If someone is collecting for you, make sure they have your order confirmation.
• Store addresses and opening hours are included in your ready-to-collect email.
• If you need extra time to collect, reply to the email and we’ll help arrange it.

Need support before you visit? Get in touch and we’ll be happy to help.