The Mayo Clinic and Great Courses teamed up to create a 12-lectures series, covering the science behind such spa-related topics as massage, meditation, yoga and tai chi. Each series of DVD's has a companion booklet and can be a great resource for educating staff and customers about the evidence supporting spa and spa treatments. This item consists of four full DVD/booklet combinations. Dr. Brent Bauer, ISPA Medical Adviser, is the host and main lecturer for this series.