Although body-exchange programs mean no one ever has to stay in one meat suit for long, returning yours in bad condition means you forfeit your deposit. Keep your constitution in returnable condition with today's Groupon: for $99, you get six weeks of unlimited boot-camp classes at Body Basics (a $249 value). Body Basics’ certified coaches espouse proper pumping technique in a friendly, welcoming atmosphere. After a muscle-prepping warm up, boot-camp sessions harness the hardening power of high-intensity exercises to enhance range of motion, flexibility, and strength. Fledgling fitness fans walk away with an arsenal of routines that can be replicated almost anywhere, from the living-room carpet to dusty baseball dugouts. Classes are capped at a cozy 10 students, so see the gym’s schedule and call Body Basics to reserve your sporting spot.