Is Sudarshan Kriya hyperventilation?

Sudarshan Kriya is not hyperventilation. A person hyperventilating will often experience lightheadedness, blurred vision, muscle spasms of hands and feet, a general feeling of being unwell, fainting and loss of consciousness.

In contrast, Art of Living course participants learning Sudarshan Kriya report a state of deep relaxation while feeling rejuvenated and re-energized. Clearly the experiences of persons practicing Sudarshan Kriya are exactly the opposite of what a hyperventilating exercise would be expected to produce. -- Bharti Verma, M.D. (The Way of Grace, by David Lucas Burge and Gary Boucherle)