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The Science

At BREEV, every product and method is backed by science.

From nitric oxide and CO₂ tolerance to nervous system control — this section explores the research, physiology, and real-world application of breathing for performance, recovery, and longevity.

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  • Why Every Hybrid Athlete Needs to Train Their Breath

    Why Every Hybrid Athlete Needs to Train Their Breath

    By Jonathan Bret

    Nasal breathing improves oxygen efficiency, CO₂ tolerance, and recovery. It sharpens focus under load and accelerates adaptation while you sleep. With simple tools like nasal strips in training and mouth tape at night, breath becomes a lever you can actually train and the gains show up across strength, endurance, and recovery.

  • Beginner’s Guide to Switching from Mouth to Nose Breathing

    Beginner’s Guide to Switching from Mouth to Nose Breathing

    By Jonathan Bret

    Switching from mouth to nose breathing can improve endurance, sleep, and recovery. Learn the science, benefits, and step-by-step method for mastering nasal breathing.