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September 13, 2026

How to breathe during an interval training session?

Comment respirer pendant une séance de fractionné ?

How to breathe during an interval training session?

Interval training makes you breathless quickly: this is normal, since its objective is to expose you to phases of sustained effort. The challenge is not to breathe only through your nose or to follow a perfect count, but to regulate repetitions, relax your upper body, and recover intelligently.

1. Start at the right pace

Starting too fast quickly turns a structured session into a struggle for survival. Begin the first repetition slightly below your maximum, then aim for consistency. Your breathing should increase, but remain compatible with proper running form.

A good interval training session leaves you with productive fatigue, not a feeling of having lost all control from the very first repetitions. The right rhythm is one you can repeat with similar quality until the end of the planned block.

2. Let your breathing adapt

At high intensity, breathing through your mouth is normal. Don't force yourself to only use your nose if it makes you tense or if your effort accelerates. Instead, focus on a complete exhalation and relaxed shoulders.

Natural and adaptable breathing is more useful than a rigid technique imposed on every stride.

3. Use recovery actively

Walk or jog according to the program, then allow your breathing rate to decrease without collapsing. The first few seconds of recovery are used to relax your hands, jaw, and shoulders. This routine prepares you for the next repetition.

Recovery is an integral part of interval training: neglect it, and the quality of subsequent efforts will plummet.

4. Control posture and stride

When breath becomes labored, many runners tense up and shorten their stride excessively. Look ahead, keep your arms loose, and avoid clenching your fists. A fluid stride helps maintain less chaotic ventilation.

Slightly reducing your pace is better than fighting against growing tension.

5. Progress with patience

Start with repetitions and recoveries adapted to your level. Increase only one factor at a time: number of repetitions, duration, intensity, or reduced recovery. Sleep and easy days are essential for assimilating the session.

If breathlessness seems unusual or disproportionate, stop the effort and seek advice before continuing.

Conclusion

Breathing during interval training mainly consists of maintaining control of your effort. Start at the right pace, genuinely recover, and stay relaxed: you will progress more sustainably than by trying to win every repetition.

Frequently Asked Questions

Should you inhale through your nose during interval training?

No. At high intensity, your mouth naturally participates in breathing. Don't force yourself.

Why do I get out of breath from the first repetition?

Your starting pace may be too fast or your warm-up insufficient. Start more gradually.

Which recovery should I choose?

Follow your plan: walking, jogging, or resting. The goal is to be able to perform another good repetition.

Should I talk during recoveries?

Being able to say a few words is a good indicator of returning to calm, without being an absolute rule.

Is a nasal strip useful for interval training?

It can provide comfort for some runners but should be tested during training and does not replace pace management.

When should I stop the session?

Stop if you experience chest pain, malaise, dizziness, or unusual breathing difficulty.

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