Bas RuttenO2Trainer: Breathing Muscle Training Device – Lung Power & Endurance Tool for Athletes, Singers & High-Altitude Performance – Diaphragmatic Respiratory Trainer – 16 Resistance Caps – Green

After reading about this product, I wasn't sure if it would actually do anything, or if it would merely produce nothing more than a placebo type effect. After about a month of use during routine exercise, I noticed a marked difference in how quickly my breathing recovered when I didn't have the O2 Trainer. And I have only made my way to the fifth resistance cap. This O2 trainer is great because it is a practical size to actually bring along with you in a bag, it does not cover your face like an alien face hugger, cleaning is quick and easy, switching out the resistance caps is straightforward, and it all stores in a simple case. It is easy to bring along and grab before a workout or take along to work. There is nothing to break on it as it's made out of a rubber-type material. This is huge because I can just throw it in a bag and not worry that the bag gets sat on or crushed by something. I don't have to worry about scratching a faceplate or cross-threading a screw-on attachment. It comes in two simple colors, so there is no need to buy an outrageous neoprene sleeve to "hide" your device or anything. Wearing it is intuitive and doesn't require special training or practice. Also, for those who look at other O2 trainers as I did and notice that this device fails to cover the nose, realize that you can breathe out of your mouth, or use the nose clip that is included. All in all, this was a great purchase, affordable, durable, and is actually showing results that I can feel.To speak to the issue of saliva build-up in the device: Yes, it does tend to build up as your workout length or intensity does, but I will admit that I have been using it exclusively outdoors and it has not been an issue for that reason. It's not any more than you would get breathing into any device. Condensation will accumulate, but I believe it is manageable.Bottom Line: If you are looking for O2 resistance in a device that is practical and easy to integrate into whatever you want to do, the Bas Rutten O2 Trainer answers the mail.

I liked and was surprised how easy it is to clean a little bit of dish soap in a bowl dip, shake, rinse. 45 seconds to clean or less.Also I am retraining my breath to be diaphragmatic as instructed cool process.

With just 3 weeks of consistent use (4-5 days per week) I have experienced significant and unexpected positive effects from this device.Benefits include immediate calm right after use, which facilitates my morning meditation with more initial relaxation. As the Taoist's say: "Amateur meditators meditate to relax, professional meditators relax to meditate" - the O2 Trainer enables the relaxation effect for me right away. Second, the energy that I am experiencing throughout my day is significantly increased with use as well; definitely an increased skip in my step. I understand this is a contribution to my already athletic lifestyle and that I've been a serious athlete and healthy eater my whole life. (I'm 58 years old).My main sport for the last 35 years has been inline speed skating and for about 9 months of the year I'm skating about 50-60 miles per week. One thing I noticed since starting to train with the O2 Trainer is that I can breath more comfortably through my nose for the majority of my skate. This is significant as I've been working on this technique for years without any significant improvement. Today I skated in 45 degree weather in upstate NY and was mostly breathing out of my nose the whole time and felt like my stamina has found something I've been missing. Looking forward to increased benefit with continued use. Thanks Bas!

Works well, saliva will eventually start coming out 🤪 but it does help train hour diaphragm

I'd been wanting to expand my lung power for a while, and decided to take a chance on the O2 trainer, rather than the more expensive alternatives. While the mask version was tempting, it the downside (besides the cost,) is that some reviewers said the mask comes loose around the ears, and needs to be re-adjusted. Far as the O2 trainer, anyone who's ever used a mouthpiece is familiar with the slobber issue - particularly when exercising intensely. For me, it's no issue at all. Suck it up and either swallow it, or shake it out every once in a while. I'm on the #4 cap at the moment, and it's starting to get more challenging. It forces me to have deeper and more controlled breathing. Also offered is a nose clip, just to make sure you can't cheat by breathing out the nose when things get tough. All things considered, this is exactly what I was looking for. No unecessary bells and whistles. Just a simple idea which can potentially result in a more powerful set of lungs.

I am writing this with tears in my eyes. This is the first product review I have ever written. I have been suffering from asthma for about 4 years. My problem is that mucus keeps building up in my lungs aggravate my infection. The inhaler helps for sometime. But I didn’t like the idea of living on it for the rest of my life. I always look for natural options like herbal tea, vitamins and saunas baths to loosen the mucus and help me remove it from my body. But this product saved and improved my life. It helped me remove fluid buildup in my lunges after 5 minutes session. It works like magic. For asthmatic people like me please try this product it works like magic for me and hopefully for you too. I use the product at level 13 every time day in day out and I have been feeling great . Also I find it easier for me to spend more time at the gym. Best purchase I’ve ever made in my life.

Works great so far except the flappy piece on the side that is suppose to restrict airflow with the gasket broke . Is there anyway to order a replacement piece

I see already a lott of improvement in my cardio when training kickboxing and bjj, after 3 weeks of exercise. Still 3 weeks to go.