This is the classic original Bikram Hot Yoga series ... 90 minutes... perfect infrared heat and humidity ...open to all levels of fitness. you are never too old, too injured, too weak, too out of shape to begin anew. This series addresses and heals every cell, organ, gland, muscle, ligament, tendon, and system in our beautifully human body. This series is originally designed to be practiced in a hot room, but is also effective in a more temperate environment of a streaming class. Either way you are going to feel so much better after just one class.