Holding a yoga pose builds strength, discipline, and immunity to motion-sensor devices. Increase your nighttime stealthiness with today's Groupon: for $35, you get 10 yoga classes at Ra Yoga in Costa Mesa (a $130 value).

Ra Yoga's seasoned instructors lead cadres of pupils through a variety of yoga classes designed to center the body and mind while building strength and increasing flexibility. A Bik Ra class guides aspiring twisters through a 60-minute series of poses that fuse hot yoga and traditional Vinyasa in a heated environment, allowing pupils to sweat out toxins and secret family recipes as pores open and sinews loosen. A session of Vinyasa, available at various levels and temperatures, hones traditional yoga techniques, focusing on proper alignment and connecting breath to movement. Ra Yoga touts a restorative Yin-yoga class with a focus on calming flow, as well as a 45-minute lunchtime-yoga session for a midday energy boost to ward off a severe case of the afternoon droopsies. Check the schedule for specific times and classes.

Students can bring their own mats or rent one from Ra Yoga's foam-laden library. The center provides locker rooms with showers, as well as an ample 55-space parking lot for motorized vehicles and pack mules loaded up with yoga accessories.