Why Are Athletes Switching to Nasal Breathing?
For decades, athletes were told to breathe through their mouths — the more air, the better. But recent research shows that nasal breathing during exercise has some surprising advantages. Nitric oxide produced in the paranasal sinuses improves oxygen transport to the muscles. Nasal breathing forces the body to use available oxygen more efficiently, which over time increases endurance. Elite athletes like Sifan Hassan and Eliud Kipchoge are well known for their nasal breathing technique.
The Physiology of Nasal Breathing During Exercise
During physical exertion, nasal breathing engages the diaphragm more than mouth breathing does. The diaphragm is the most powerful breathing muscle — its full activation means deeper breaths, better gas exchange, and a more stable core. Nasal breathing also maintains optimal CO2 levels in the body, which paradoxically improves oxygen delivery to the tissues (the Bohr effect). Studies on athletes found that after 6 weeks of training with nasal breathing, their VO2max didn't drop, but respiratory efficiency increased by 22%.
How to Get Started — A 4-Week Plan
Weeks 1–2: Start with easy workouts — walks, light jogging, yoga. Breathe exclusively through your nose. If you need to open your mouth, slow down. Week 3: Introduce nasal breathing into moderate-intensity workouts. Run at a pace that allows you to breathe through your nose. Week 4: Try nasal breathing during higher-intensity sessions. It's okay to breathe through your mouth during intervals, but switch back to nasal breathing between sets. Oxistrip Sport strips can help keep your nasal passages open.
Nasal Breathing for Runners
Running is the discipline where nasal breathing delivers the greatest benefits. When you run while breathing through your nose, you naturally adjust your pace to match your respiratory capacity — it's a built-in intensity regulator. At first, your running pace will drop by about 15–20%, but after 4–6 weeks it returns to normal, and your endurance keeps improving. The key rule: run at a pace where you can breathe through your nose without strain. If you have to gasp through your mouth, you're going too fast.
Nasal Breathing at the Gym
At the gym, nasal breathing helps you maintain core stability and control intra-abdominal pressure. During strength exercises: inhale through the nose before each rep, brace your core, and exhale through the nose or mouth during the concentric phase. Between sets, breathe calmly through your nose — it speeds up recovery between rounds. For heavy attempts (above 85% of your 1RM), mouth breathing is acceptable for safety reasons.
Do Nasal Strips Actually Work for Athletes?
Nasal strips like Oxistrip Sport are gaining popularity among athletes worldwide. Mechanically widening the nostrils reduces airflow resistance by 30–40%, which is especially noticeable during exercise. A 2025 study on a group of 80 amateur runners found that using nasal strips during training improved subjective breathing comfort by 40% and extended time to exhaustion by 8%. Nasal strips are permitted in all sports.
Common Mistakes and How to Avoid Them
Switching to nasal breathing too quickly during intense workouts can lead to frustration and hypoxia. Nasal breathing doesn't mean you never open your mouth — during sprints or hard intervals, mixed breathing is perfectly natural. Don't force nasal breathing when you have a cold — a blocked nose makes it unsafe. Give yourself time — the habit takes about 4–8 weeks of regular practice to develop.