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 $49, you get 10 Yoga, Tai Chi, and Mat Pilates classes at Green Lotus Yoga and Healing Center in Lakeville (a $120 value).

Green Lotus's healing instructors and yogis bend over backwards to educe balance, strength, and overall wellness with a range of 35 weekly classes. Alignment Yoga focuses on the development of breathing techniques and basic poses that enable easy reconnaissance of secret laboratory ventilation shafts. The hour-long Restorative class helps beginners achieve relaxation through slow, fluid movements. Hot Yoga and Hot Power Fusion, both 75-minute classes, crank the studio’s temperature up to 100 degrees to warm muscles as effectively as Steven Seagal's snuggle blankie. Most of the studio's classes welcome participants of all skill levels, and some are tailored to certain demographics, such as Prenatal Yoga for pregnant women and Yoga for CancerCare, aimed at those afflicted with cancer as well as their family, friends, and caregivers. Various other classes include Gentle Yoga, Power Vinyasa, Hatha, Dynamic Flow, and Yin.

Though Green Lotus sometimes features discounted prices online, this Groupon still offers the best deal for 10 classes.