Osho talks about breathing and chakras:
"If there is awareness with deep breathing the prana will expand and the life energy will start to rise upwards. Awareness is the key for rising upwards and unconsciousness is the key for falling downwards.
"If a person can come to awareness through breathing then he needs no other practice, this is enough – but it is very difficult. For twenty-four hours a day, whenever you remember, be aware of your breath. Nobody will know, it can happen quietly; nobody will ever know what you are doing. Jesus has said that your right hand should not know what your left hand is doing. This also is something that no one else will know about. Silently, along with your breathing, your remembrance will gradually grow. As the breathing becomes deeper and the remembrance becomes more profound, it will hit and raise your energy upwards through the spine.
"By constant practice one day this energy will reach to your sahasrar, the crown chakra. But meanwhile it will pass through other chakras and on eachchakra there are different experiences; on each chakra your life will be filled with a new light. And as your energy passes through each chakra, new fragrances, new meanings, a new significance will start to happen in your life, new flowers will bloom in your life.
"After experimenting many thousands of times, the science of yoga discovered what exactly happens on each chakra. I will give one or two examples so that you can understand, because the chakras have also been named according to the experiences connected with them.
"For example, yoga has named the chakra between the two eyes the agyachakra, the command chakra. It has been called the agya chakra because the day on which your energy passes through that chakra, your body and your senses will start obeying you. Whatsoever you desire will immediately happen. You will have command over your personality, you will become the master. Before your energy reaches to this chakra you are a slave. You will become the master only on the day your energy enters into this chakra. From that day onwards your body will obey you. Now you are obeying your body because in the place from where the body can be mastered you are empty. The energy is not in the place from where you can command it. This is why this chakra is called ‘the command chakra’;. All the chakras are named in this way. These names are meaningful because there is a particular state connected with each chakra."
Osho, The Message Beyond Words, Chapter #11
OSHO Chakra Breathing – Instructions:
Eyes remain closed for the whole meditation.
First stage: 45 minutes
Stand with your feet apart as wide as your shoulders. Open your mouth and begin to take deep rapid breaths into your chakras, your energy centers. Start with the lowest center, the first chakra. Whenever you hear the bell, then move your breathing up into the next chakra. Your breathing should become more rapid and more gentle as you move upwards through each of the chakras. Let your body be loose and relaxed. You can move, shake, or do any slight movement that will support your breathing. At the seventh chakra, you will hear three bells. Now let your breathing turn and slowly fall back through all the seven chakras down to the first again. You have about two minutes to reach back to the first chakra. This cycle is repeated three times. You will be guided through the meditation.
Second stage: 15 minutes
Sit down with your eyes closed, be silent and watch whatever is happening within.