Exercise is both physically and mentally demanding, like misplacing your yacht in the middle of the ocean while on captain duty or trapping antimatter in a buffalo stampede. Stimulate mind and body with today's Groupon: for $20, you get one month of unlimited fitness classes at Junkyard Athletics (a $79 value). This Groupon is also valid for half off a second month of unlimited classes.

Junkyard Athletics whisks exercisers to healthier lifestyles with a flexible schedule of challenging interval-training regimens and ever-changing workouts. Leading contingents through a series of indoor and outdoor exertion, muscle-forging instructors consistently baffle bodies with new routines that utilize available surroundings, such as grassy fields for sprints or jungle canopies for fresh-fruit retrieval. Lasso nomadic strength fibers with taxing sessions of tire dragging, jump squats, and weight training, or prepare for upcoming locomotive-pulling events with resistance-band sprints. Classes are designed to cater to all levels of fitness, and typically last about an hour.