Bas Rutten O2 Trainer: https://amzn.to/45OWQWa ~ *About this item* THE OFFICIAL BAS RUTTEN RESPIRATORY TRAINING DEVICE - Designed by Bas Rutten himself to increase inspiratory (inhalation) muscle endurance, the O2 Trainer is a lightweight breathing device that regulates air intake and improves muscle oxygen efficiency during exercise. The O2 Trainer works by restricting air intake to strengthen the abdominal muscles and regulate ones breathing form, overall contributing to a healthier circulatory and respiratory system. It's been said this device can improve sleep apnea, asthma, and general lung function. Diaphragmatic breathing is meant to help you use the diaphragm correctly while breathing. This breathing technique offers several benefits to your body including reducing your blood pressure and heart rate and improving relaxation. ~ Disclaimer: By purchasing any products through my affiliate links, I will earn a small commission that greatly helps support my channel :) Also be sure to consult with your physician before buying or attempting to use this product.