Prana is considered to be in the chest. It is considered to be the most important because it helps in breathing. If there is breath, there is life. The word prana is formed by combining two words, Pra and Aan. Pra means first or chief and Aan means coming or flow of power. Apan is considered to be below the navel. It is connected to Swadhisthana and Muladhara Chakras. Anyway, all the pranas are connected to some chakra or the other. Its work is waste excretion. It also helps in sexual intercourse. Udana is located above the chest. This word is formed by the combination of ut and aan. Ut means above. This means that the prana power going upwards is Udana. All these pranas are connected to each other. First of all, the man takes a deep breath from the navel. This activates the samana prana there. The name samana is because the energy of the food produced with its help is distributed equally throughout the body. Due to the activity of Samana Prana, the Upa Prana named Krikal also gets activated, which makes us feel hungry. There are five Upa Pranas too, which help in the activities of Pranas. This entire body is filled with Pranas. Due to the activity of Samana, Vyana Prana also gets activated there. The word Vya of Vyana gives a sense of pervasiveness. It means that this Prana is spread in every vein and every cell of the entire body. It is actually connected to blood circulation. By focusing on the navel, blood circulation will definitely increase there, as it is a rule that the blood flow increases at the place of meditation. Then the blood reaches every cell. This activates the Vyana spread there. Then the work of releasing digestive enzymes from the cells, absorbing the digested food in the blood and sending it to the entire body starts. Some part of samana becomes apana that propels undigested food down to excretion. When majority of digestion has happened, the majority of Samana Prana of the navel comes to the chest and starts giving strength to the breath and the heart. It means it starts functioning as main Prana. Udana Prana helps that Samana Prana to rise upwards. It is also felt as it rises through the back. Breath starts flowing from the chest. That is why after the food is digested, a person gets stressed due to the worry of work. And he wants to work hard until the next hunger strikes. This happens due to breathing from the chest. Food is coming to the whole body and one feels like working. Then the person gets tired of work and starts taking some rest. At that time his Prana starts rising upwards in the form of Udana. This gives strength to the Vishuddhi Chakra, speech associated with it, Agya Chakra, thoughts associated with it, due to which the person gossips or starts strutting in thoughts. Then the person rests and starts sleeping. At that time his Udana Prana descends down and comes to Swadhisthana and Mooladhar and becomes Apana. Then after waking up from sleep, his stress ends, due to which breath starts flowing from the navel automatically. Peace or sleep and breathing from the navel, both are interconnected. By doing one, the other starts happening automatically. Due to this, Apana rises upwards and becomes samana again. This makes us feel hungry again. This way the cycle continues again and again.
All the pranas keep the body balanced by uniting and helping each other. By Kundalini Yoga, we can balance the entire body clearly and abundantly at one go by focusing the pranas on all the chakras. Otherwise, this process keeps going on itself day and night at a slow pace without our knowledge. If there is any imbalance in it, then it gets balanced by Kundalini Yoga. That is why it is said that Kundalini Yoga helps in preventing diseases and in curing them if they occur. Most of the diseases arise from imbalance in the body.
All this description is only to create interest in Kundalini Yoga. There is not much need for it in practice. But today’s logic-oriented society should also keep getting some nourishment. By doing simple yoga, asanas and pranayama, the entire body automatically remains balanced. Then the worldly affairs related to it will also remain balanced, what doubt can there be in this? The car will run even if you know about its parts, and it will run even if you don’t. Yes, a person who knows about its parts will service them on time and make the car run better.