Nasal Breathing During Exercise (Maffetone Method)

What is Nasal Breathing During Exercise (Maffetone Method)?

Training exclusively through the nose at or below the Maximum Aerobic Function (MAF) heart rate to build aerobic base, improve fat oxidation, and enhance respiratory efficiency. Nasal breathing increases oxygen uptake by 10-20% and engages the diaphragm more effectively than mouth breathing.

Is there evidence for it?

How do you do Nasal Breathing During Exercise (Maffetone Method)?

1. 1.Calculate your MAF heart rate: 180 minus your age. Adjust: subtract 5 if recovering from illness/injury or on medication; add 5 if you've been training consistently for 2+ years without issues.
2. 2.For all aerobic training (running, cycling, rowing), breathe exclusively through your nose. If you must open your mouth, you're going too fast — slow down immediately.
3. 3.Start with 30-minute sessions at MAF heart rate. Your pace will feel embarrassingly slow at first — this is normal. Accept it. Speed comes with aerobic development over weeks/months.
4. 4.Perform a monthly MAF test: run/walk a set distance (e.g., 5K) at your MAF heart rate and record the time. You should see progressive improvement (faster times at the same heart rate) over 3-6 months.
5. 5.Practice nasal breathing during daily activities first to build the habit. Use mouth tape during sleep if comfortable (consult a doctor first). Reserve mouth breathing only for high-intensity intervals or competition.

How long does it take?

30-60 minutes per aerobic session, 3-5x/week.

Is it hard to start?

medium.

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