OB YOGA in collaboration with the Quebec Cancer Foundation offers Free. yoga classes to all people who have been diagnosed with cancer and are undergoing chemotherapy, radiotherapy or hormone therapy, according to their physical abilities. OB YOGA has designed a class specifically formulated for people undergoing cancer treatment, followed by a period of guided meditation to relieve the stress of this ordeal. Isabelle O’Brien, who leads these classes, is certified in oncological yoga by the University of Calgary.