A trainer's guidance helps exercisers gain proper posture, stay motivated, and easily subdue feral treadmills. Get help taming these wily devices with today’s Groupon: for $25, you get three classes (a $55 value) and a waived new-member fee (a $10 value) at Barry’s Bootcamp fitness studio (a $65 total value). Today's deal is valid at the San Diego location on Cleveland Avenue.

The eponymous Barry Jay has revolutionized Southern California fitness with unique and energizing group workouts that blend cardiovascular routines with strength training. The program achieves the long-elusive dream of a funkier army by combining drill-sergeant-style motivation with dance-party fun. Dozens of classes are held throughout the week, with each day's routine targeting different muscle groups to prevent uneven development of a super-strong right calf. Each one-hour workout distills the most effective exercise techniques into a no-nonsense combination of cardio-interval exercises and strength training using free weights and autonomous lifting-pianos. A team of instructors lead classes with energy and passion, helping students burn hundreds of calories per session.

Inside the San Diego studio, a phalanx of treadmills and workout steps all struggle to catch a glimpse of themselves in the wall-to-wall mirror. Wrapped in camouflage-print walls, the studio oozes with the program's universal energy and a fun military vibe that has attracted numerous Hollywood stars such as Jake Gyllenhaal, Christina Applegate, and Kim Kardashian. Students with today's deal can take an additional 15% off future classes.