The most secretive body parts are muscles, which hide behind layers of skin and occasionally appear to help lift cars off trapped kittens. Flex your biceps in the absence of a cat emergency with today's Groupon: for $25, you get an unlimited one-month pass to an AIM workout class at the Arkansas Sports Performance Center (a $60 value).

The Arkansas Sports Performance Center is staffed by certified instructors, who work to help athletes improve their physical fitness and stamina. Take advantage of their expertise—whether you're a seasoned fitness veteran or a fledgling neophyte ready to take flight on tender and untrained trapezius muscles—with one month of unlimited group AIM workout classes.

The AIM workout uses intense circuit-style workouts to jump-start stalled fitness routines and convince fat and flab to find new lodgings. A flexible schedule offers morning, afternoon, and early evening class options Monday through Friday. The group element of the workout will motivate you to push yourself harder, help you stick to a regimen, and give you the opportunity to bond with new friends over tales of general sweatiness and mutual plans to beat up the ocean.

The Arkansas Sports Performance Center has helped athletes such as Darren McFadden and Darin Erstad—along with athletes named Darrin, Darryn, and Dare-In—up their respective games through careful training and fitness consultation. Step into the center and build a better you with the AIM workout class.

New clients only.