Expiring, this forgotten art - why exhaling matters as much as inhaling

A short step-by-step guide to rediscovering the often-neglected half of breathing: the time of exhalation, the one that truly calms.

When you start to become interested in breathing, you are almost always guided towards inhalation: "breathe deeply," "take a deep breath," "fill your lungs." Then you focus on this beginning of the movement, you take a big gulp of air, and... often, you don't know what to do next. You exhale quickly, as if the exhalation is just a "return to the line" between two real breaths.

Yet it is exactly the opposite. In most breathing traditions - Indian pranayama, Chinese qi gong, Zen meditation - it is the exhalation that is the key. It is the one that poses, that dislodges, that lengthens. This week, we look at why, and we try together a short exercise, without equipment, to do sitting on a chair.

Why exhalation counts so much (and often more)

Two reasons to remember, one mechanical, the other nervous.

1. Mechanical. At the end of a normal exhalation, there is always some air left in the lungs - this is what physiologists call the residual volume. If you never exhale completely, you inhale over this old air. A longer and more complete exhalation makes room; the following inhalation then becomes naturally more ample, without forcing. That's why "taking a deep breath" by force, when you're stressed, rarely works: you haven't made room.

2. Nervous system. Inhalation slightly accelerates the heart rate (via the sympathetic system); exhalation slows it down (via the vagus nerve, the branch of the parasympathetic system that calms). In other words: lengthening the exhalation is sending a message to the body: "everything is fine, we can relax." This mechanism (respiratory sinus arrhythmia) has been described in physiology for a long time. It is found, formulated differently, in all breathing traditions that prescribe a longer exhalation than inhalation.

A short exercise - the "4-6" breathing

Nothing spectacular. Just an exhalation a little longer than the inhalation. To do once a day at the beginning, ideally at the moment of switching from one time of the day to another (end of work, before a meal, before going to bed).

Position: sitting, back straight without being stiff, feet flat on the floor, hands resting on the thighs. You can close your eyes or focus on a neutral point on the floor in front of you.

1. Observe a breath (30 seconds). Without changing anything, feel where the air enters: is it the belly that moves, the chest, the ribs? Don't try to correct - just see.

2. Set a rhythm.

• Inhale through the nose counting 1 - 2 - 3 - 4 (about 4 seconds).
• Exhale through the nose (mouth closed) counting 1 - 2 - 3 - 4 - 5 - 6 (about 6 seconds).

The count can be slower or faster depending on your comfort: the important thing is not the exact duration, it's the ratio (exhalation about 1.5 times the inhalation).

3. Repeat 6 to 8 cycles. This takes a minute, a minute and a half. That's all.

4. Resume normal breathing, without counting, for a few seconds, before resuming your activity.

Small comfort rules

• Through the nose, as much as possible. The mouth to exhale is not forbidden (it is even useful in some traditions), but start with the nose: it is softer, it filters and warms the air.
• Do not block between phases: we seek fluidity, not performance.
• If you feel dizzy: stop, breathe normally. This can happen at the beginning when you lengthen the exhalation too much. Reduce the count (for example 3 inhale / 5 exhale), resume later.
• This exercise is not a therapy. It is part of the micro-practices of appeasement, alongside walking, sleep, a healthy living environment. In case of persistent anxiety, sleep disorders that set in, or respiratory discomfort, you should consult a health professional. Breathing accompanies - it does not replace.

What it changes, day after day

The first time, we often find that six seconds of exhalation is long - the end of the exhalation is done in a slight lack. It's normal: we are used to just letting out a little air. In a few days, the 4-6 ratio becomes comfortable, then you can go to 4-7 or 4-8 if the desire comes (without forcing, without setting a goal). What we gain is not spectacular: a little more calm at the moment when we needed to take a break, a little more settled sleep in the evening, a little less presence of shoulder tension at the end of the day.

It's a tiny exercise. But breathing, we do it about 20,000 times a day. Re-orienting, even slightly, half of this movement that we ignore, it ends up being felt.

Take care of your exhalations.