According to Hatha Yoga Pradipika, Kapalbhati has been included in the six activities of Shatkarma, through which foreign substances accumulated inside the body are removed. In relation to Kapalbhati, many people propagate that Kapalbhati is Pranayama. While the truth is that Kapalbhati is an important activity of Shatkarma of body purification (purification).
The literal meaning of Kapalbhati is skull. The upper part of our head is called skull and the meaning of Bhati is derived from light.
Kapalbhati has been considered the best process to stay healthy. It proves beneficial in all kinds of diseases like nectar. It will not be an exaggeration to call Kapalbhati the Amrita of Yoga, because just as Giloy is known as Amrita in Ayurveda, because Giloy is beneficial in all diseases, similarly Kapalbhati is also the Amrita of Yoga, being beneficial in all diseases.
Sitting in Padmasana, Vajrasana or Sukhasana, take a long deep breath and exhale. Slowly keep speeding up the process of exhaling, as well as the most important thing to keep in mind is that while inhaling, the stomach is outside and while exhaling, the stomach is inside. Take one third of the laxative time as compared to purak, the breath should be released so fast or quickly that their number increases up to 120 in 1 minute. While inhaling and exhaling only the abdominal muscles should move.
Rest any kind of movement on the chest and shoulders has to be controlled. Keep practicing long breaths in between. Increase the time gradually.
Patients with high blood pressure, epileptic seizures, spinal problems, hernia, after any type of surgery, etc. should practice Kapalbhati under the supervision of a naturopath or yoga instructor. The practice of Kapalbhati is prohibited for three months after any type of surgery.
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