The Exhale Drives the Rhythm
In Kapalabhati, often translated as “skull-shining breath,” the practitioner repeatedly contracts the abdominal muscles to push air out in short, forceful bursts. The inhale is usually more passive: after each exhale, the abdomen relaxes and air flows back in. That makes the exercise different from ordinary deep breathing, where inhaling is often the more deliberate part.
The pace and effort matter. A long run of rapid exhalations can move more air than the body needs to maintain its usual balance of gases, especially if the practitioner breathes quickly or intensely.
Why Lightheadedness Can Follow
With rapid breathing, a person may exhale carbon dioxide faster than the body produces it. The resulting drop in carbon dioxide can narrow blood vessels in the brain temporarily, reducing blood flow enough to cause lightheadedness, tingling, or a sense of unreality. Those sensations can feel striking, but they have a physical explanation and are not, by themselves, evidence of a spiritual event.
That does not settle what the practice means to someone who uses it in a spiritual tradition. It does explain why an unusual sensation can arise during the exercise without requiring a supernatural cause.
Intensity Changes the Experience
The same technique can feel different depending on its speed, force, and duration. If dizziness or other uncomfortable symptoms appear, continuing to push through them can make the experience more pronounced; stopping the rapid breathing and returning to a comfortable, unforced rhythm gives the body a chance to recover. The memorable part is that a breath practice meant to feel energizing can also change blood chemistry enough to make the room seem briefly unsteady.
