Yoga is a much easier way to exercise both mind and body than testing Einstein's theory of relativity by racing a beam of light. Avoid a science-related sprain with today's Groupon: for $25, you get 10 yoga classes at The Sanctuary in Tustin (a $100 value).

The Sanctuary’s passionate instructors forge holistic healing with inward-focusing yoga classes, complemented by an on-site wellness center and a bookstore. The studio’s host of classes is scheduled regularly throughout the week, including Yoga Basics, focusing on alignment and body awareness; Relaxation Yoga, emphasizing stress reduction; Vinyasa Flow Yoga, highlighting breath work and meditation; and pretzel-baking classes, providing creative inspiration for future poses. Accompanying The Sanctuary’s novice-friendly teachings are advanced classes, such as Level I/II Flow Yoga, focusing on more-challenging postures, quick transitions, and elementary fire-breathing. The studio provides yoga mats, allowing students to come to class directly off the street, straight from the boardroom, or from the deck of a Sky Ship.