Sit-ups remain one of the best methods of reshaping the abdomen, second only to standing in front of a lit cannon. Enjoy explosive exercise with this Groupon.

Choose Between Two Options

• $32 for 20 drop-in CrossFit classes (a $200 value)
• $197 for 12 personal-training sessions (a $720 value)

During high-intensity CrossFit classes, instructors meld strength training and cardiovascular exercises into constantly varied group workouts based around bursts of functional movements. Passionate personal trainers help students sizzle away calories during one-on-one workouts that focus on fat loss with skill-appropriate strength-and-conditioning exercises.

CrossFit Chesapeake

Following the CrossFit ethos, CrossFit Chesapeake's instructors design high-intensity workouts that build strong, resilient bodies. Depending on their fitness levels, participants may begin the gym's muscle-manufacturing process with exercises that use only their body weight, such as squats, pushups, and tonguestands. As tone and technique improve, trainers tack on tonnage with sonorous dumbbells and hissing kettlebells, as well as with plyometric boxes and medicine balls. Cardio blasters such as rowing, running, and rope jumping also enliven workouts. CrossFit’s physical-transmogrification process unfolds with the help of passionate personal trainers, who craft individualized workouts according to client ability and fitness levels. To encourage progress and accountability, trainers urge clients to set incremental goals and record their achievements, preferably in a magical tome with a face on the cover that screams encouragement whenever it smells sweat.