The restorative effects of gentle heat are well known, which is why football players often scrimmage over hot coals and runners pass lit firecrackers instead of batons. Watch mercury rise with today's Groupon: for $59, you get a 10-class hot-yoga pass at YogaFlex in Commack (a $160 value).

YogaFlex's nimble instructors guide students through balmy workouts in their new studio space, which offers Barkan hot yoga, Barkan hot Vinyasa, and classic hot yoga. Ninety-minute classes encourage greater flexibility, detoxify bodies, and steam away wrinkles in time. Classic hot yoga takes students through 26 sweat-inducing poses in a 100- to 105-degree heated room, and the Barkan hot-yoga practice incorporates more range of motion. After a Barkan hot Vinyasa class incorporating five Vinyasa sequences and postures, patrons will rediscover long-forgotten muscle groups and a newfound ability to maneuver through keyholes. Consult the schedule for class times.

Each student should bring a water bottle, mat, and towel (though these items are available at the studio for an additional fee), and a fresh change of clothes. YogaFlex's studio also contains separate changing rooms with showers for men, women, and waterproof robots.