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 to Fairmount Athletic Club in King of Prussia. Choose between the following options:

• For $129, you get a three-month racquetball-and-fitness membership (up to a $376 value).
• For $99, you get a three-month fitness membership (up to a $256 value).

Offering Australian racquetball, an array of fitness equipment, and more than 70 exercise classes per week, Fairmount's roomy studios and courts encourage exercisers to bend, stretch, and sweat their way toward fitness goals. With the three-month fitness membership, Fairmount Athletic Club's teams of upbeat, certified instructors motivate exercisers of all fitness levels with free weights, cardio equipment, and classes that delve deeply into the worlds of yoga, Pilates, spinning, and belly dancing. Hustle through Zumba's Latin dance grooves, experience Buddha ballet—a medley of yoga, Pilates, and ballet poses—or greedily soak up the wisdom of age in one of the Silver Sneakers sessions. The comprehensive exercise facility boasts enough fat-fighting machinery to melt a donut down to only its nutritious nuts, including both cardio and weight equipment. Both of today's options also come with two personal-training sessions and a chiropractic evaluation, ensuring that spines are stacked as well as an architect's game of Jenga.

Australian racquetball combines squash and tennis, played on a regulation squash court with a larger, bouncier ball and larger rackets to encourage longer volleys for a more intense fat burn. Like a witch performing community service, organized racquetball play sweeps the court twice a week. Unrestricted access to exercise classes and fitness facilities ensures ample opportunities for conditioning between racquetball sessions.