Although feeling the burn during a workout is generally a good sign, feeling the burn while sitting on the sofa means your sofa is in the fireplace. Engage in controlled, constructive body burning with today's Groupon: for $24, you get a two-month membership (up to a $130 value) at Titans Gym. Choose between the following locations:

• Downtown at 619 Prospect Avenue (a $130 value)
• In Mentor at 7655 Mentor Avenue (a $100 value)

The 24-hour Titans Gym enhances endurance with the latest equipment and the expertise of certified personal trainers, with its downtown location earning the accolade of Best Urban Gym from Cleveland Scene magazine in 2010. Strive, Precor, and Magnum machines resist unabashed muscles with weights, bands, and fake phone numbers, and rows of treadmills, bikes, and multiple styles of elliptical machines buoy cardiovascular fortitude. The weight room at the Mentor location touts 11,000 square feet of free weights, plate-loaded machines, power racks, and more to tighten appendages into acceptable ball-peen hammer substitutes.
Sprint, stretch, or spin-kick your way toward fitness goals with group classes, including yoga, Pilates, kickboxing, and boot camp. Champion weightlifters and casual exercisers alike can benefit from the experienced and enthusiastic staff of certified trainers headed by Geoff and Niki Delgrosso, and the nutritional advice provided by the gym’s dieticians.