Hot yoga dates all the way back to cavemen, who discovered that stretching in front of fires boosted their physical endurance when hunting, moving camp, and dragging new mates by the hair on first dates. Enjoy the fringe benefits of stretching with today's Groupon to Bikram Yoga NYC. Choose between the following options:

• For $59, you get one month of unlimited classes (up to a $180 value).
For $250, you get three months of unlimited classes (up to a $500 value).

In more than 250 weekly classes held at Bikram Yoga NYC's four Manhattan locations, well-hydrated yogis enter spacious, heated studios to crane through 26 Hatha-yoga postures designed to strengthen bodies, reduce stress, and increase circulation. During each 90-minute class, approachable instructors lead students through one hour of standing postures that combine flexibility, strength, and balance to work tight muscles and open stiff joints. Classes spend another 30 minutes on the floor, linking breathing exercises and poses inspired by cobras to open up the spine and scare away stray mongeese. Throughout the workout, high temperatures help to warm muscles, sparing them from injury while promoting a healthy sweat to flush toxins from the body. Each Bikram Yoga NYC location hosts several classes throughout the day, from morning pick-me-ups to evening sessions for unwinding after a long day resetting fired catapults.

New students to Bikram Yoga NYC sign a waiver before joining the studio, after which they can attend an unlimited amount of classes at all of the four locations. Though students may rent a yoga mat for free during their first class, mat or toboggan rentals cost $5 for each subsequent session.

Although Bikram Yoga NYC offers its own one-week introductory discount for new students, this Groupon gets you a longer period of classes for a larger discount.