In yoga, breathing is the most important thing. Most of the journey of yoga is done only by breathing properly. That is why it is said that by winning the breath, the mind also comes under victory. Kundalini moves by itself with proper breathing. Therefore, by revolving the breath on the chakras, the Kundalini starts revolving on its own.
Backward flow (reverse breathing) method is the main part of breathing yoga
To learn the inverse breathing method, the first is to learn to breathe through the abdomen. It is also known as diaphragmatic deep breathing. In this, the stomach swells out when air inhaled. When the breath is exhaled, the stomach shrinks inward. If this causes the stomach to move in the opposite order, then that breath is considered to be from the chest. Breath taken from the chest keeps the mind fickle, and the body does not get enough oxygen.
In inverse breathing method, the breath is not left out of the body
Physically, this thing may seem strange, because the breath will surely come out during out breathing. But it is true spiritually. The subtle meditative power of the outgoing breath is pushed down from the stomach. It produces a sensation below the navel and around the Swadhisthana Chakra. That sensation stimulates the semen-making process.
The inhaled breath actually goes up the spine
The outgoing breath creates a point of semen sensation on the Swadhisthana Chakra. That sensation ascends upwards with inbreathing through the spinal cord after first passing to the rear Swadhisthana Chakra. It goes through all the chakras to reach Sahasrara. That sensation is accompanied by the subtle power of semen and Kundalini. In this way we can see that the air going downwards inside the bswadhishthan chakra goes upwards, and the air going upwards goes downwards. That is why it is called backward flow method.
The reverse-breathing method becomes easier with the meditation of the Sheshnaga (divine serpent) extending from the Muladhara to the Sahasrar Chakra
According to my previous posts of Sheshnag, Sheshnag has placed its base coil on the muladhar and the swadhishthan chakra. He is standing up through the spine, and he has a thousand hoods in the brain. When we breathe through the stomach, he becomes straight and stiff, stretching backwards, and lifts his hood. This means that the breath in his body climbed upwards and reached his hood. With this, the power of the aforesaid sensation goes upwards. When we exhale, Sheshnaga becomes loosened, and tilts his hood down. It seems that he exhaled with hissing downward. At the same time, the stomach also shrinks inward and presses downwards. Both of these physical effects result in sensation formed at aforementioned swadhishthan point.
Reverse breathing method is the best alternative for sexual yoga
Many people are unable to have sex due to various physical and mental reasons. This method is best for them. Renunciant Yogis also used this method. By this, the energy of semen gets transferred to the brain easily.
Demystifying Kundalini 