Astronauts regularly practice yoga to stay limber, modulate their breathing, and control their crippling fear of being eaten by the moon. Emulate the habits of cosmic pioneers with today’s Groupon: for $20, you get 20 hot-yoga classes at Adrenalin Fitness (up to a $360 value).

The seasoned instructors at Adrenalin Fitness lead a half-dozen yoga class styles in a peaceful room warmed by infrared heat and words of encouragement. By raising the temperature, the studio helps bodies sweat out soul-sucking toxins, prevent injuries, and perform stretches to a level of deep release previously attained only by popping the layer of bubble wrap protecting the earth’s core. Beginner classes impart breathing exercises and basic poses, emphasizing proper alignment to bolster strength and balance. Like classical piano solos, classical Hatha yoga engenders tranquil thoughts and the occasional headstand. Yin yoga stretches ligaments to promote flexibility and release tension, and Vinyasa sessions’ dance-like routines of sun salutations and other energetic poses tone the entire body. Before and after workouts, Adrenalin’s Pro Health Shop fuels bodies with health shakes made from protein powders, wheatgrass, and fresh fruits (shakes not included in today’s Groupon). For a nominal fee, the gym will comfort patrons with towels cleaned with water distilled from freshly sprouted angel wings. Though Adrenalin Fitness sometimes offers online discounts, today’s Groupon is the best deal available.