A long time back, in the Indus-Sarasvati civilization, some people had mastered the secrets of breathing, says James Nestor in his book Breath. The evidence is the meditating man seal or what we call the Shiva seal. It is from here that the wisdom spread to the world. The Indus-Sarasvati people discovered that breathing with different patterns — really fast, very slow, or holding breath — can cure diseases without medicines, influence body weight, and affect overall health. By influencing the nervous system and controlling the immune response, these breathing patterns can help a person live longer and healthier.

While the Yoga Sutras are well known, there are other ancient texts as well.

Thirteen hundred years ago, an ancient Tantric text, the Shiva Swarodaya, described how one nostril will open to let breath in as the other will softly close throughout the day. Some days, the right nostril yawns awake to greet the sun; other days, the left awakens to the fullness of the moon. According to the text, these rhythms are the same throughout every month, and they’re shared by all humanity. It’s a method our bodies use to stay balanced and grounded to the rhythms of the cosmos, and each other

This knowledge then surfaced worldwide, like Japan, Africa, Hawaii, and Native America. They developed breathing techniques and benefitted from the calming effects.

Two things make the book interesting. The first is when the author acts as a human guinea pig, trying out various techniques with breathing experts worldwide. These are not yogic techniques, but activities like Holotropic breathing or the Wim Hoff method or taking a carbon dioxide shot.

The other is when he explains what happens inside our body when you do these practices. Breathing is more than just the physical act. Medically it’s known that breath affects every single internal organ affecting heart rate, digestion, and moods. Deep breathing influences the parasympathetic nerves, which signals the organs to rest.

Often you see remarks like what’s there to learn about breathing, after all, it’s just inhaling and exhaling. The modern age has caused us to pay little attention to breathing. This has resulted in diseases like asthma, anxiety, and attention deficit hyperactivity disorder. Another aspect is that as we age, the lung capacity decreases, leading to high blood pressure and immune disorders.

The book acknowledges India as the source of all this knowledge. All the techniques the author tried, he says, comes from ancient Indian texts. The ancients people who did these experiments with breathing and discovered the possible miracles knew that breathing was not just inhaling and exhaling. They knew how to manipulate body functions by controlling their breath. They obviously knew a lot more than what Western science knows, like how the prana can control the mind.

When Buddhist monks chant their most popular mantra, Om Mani Padme Hum, each spoken phrase lasts six seconds, with six seconds to inhale before the chant starts again. The traditional chant of Om, the “sacred sound of the universe” used in Jainism and other traditions, takes six seconds to sing, with a pause of about six seconds to inhale. The sa ta na ma chant, one of the best-known techniques in Kundalini yoga, also takes six seconds to vocalize, followed by six seconds to inhale. Then there were the ancient Hindu hand and tongue poses called mudras. A technique called khechari, intended to help boost physical and spiritual health and overcome disease, involves placing the tongue above the soft palate so that it’s pointed toward the nasal cavity. The deep, slow breaths taken during this khechari each take six seconds.

There are a couple of issues with the book. While the book mentions Indus-Sarasvati civilization by that name, it also mentions the Aryan Invasion Theory. It has a fascinating twist – the Aryans came from Iran and not Russia. Second, the author gives credit to Indians for discovering the secrets of breathing, but to talk to a yogi, he goes to Brazil. Why not go to the land where it started and where it’s a living, breathing tradition.

If you were one of those skeptical about yoga and pranayama, this book would change the way you think about breathing. By combing ancient wisdom with scientific evidence and first-hand experience, the book distills the knowledge in an easy-to-read narrative. In the end, it advocates breathing slow and less through the nose as it sends the maximum amount of oxygen to the maximum amount of tissues.

Swami Vivekananda wrote that the breath is the fly-wheel of the body. In a big machine, the fly-wheel is set in motion first. That motion is conveyed to finer machinery until the delicate and finest machinery is in motion. “The yogi’s life is not measured by the number of his days, but the number of his breaths,” wrote B. K. S. Iyengar. The fact that a sick child would live to the age of 95 is proof of the book’s secrets.