OxyBio Breathing Trainer Review: Is This Budget Lung Gym Worth It?
If you have scrolled through fitness feeds lately, you have probably seen athletes with strange gadgets in their mouths, looking like they are Bane from The Dark Knight. This is the world of Respiratory Muscle Training (RMT), a method designed to strengthen your diaphragm and intercostal muscles. While high-tech devices like the Airofit cost hundreds