Boot camp workouts are gaining popularity around the country for their blend of an intense time-efficient workout, group camaraderie and effectiveness.

The military-style program — a circuit of drills ranging from running and jumping jacks to push-ups, squats and sit-ups — appeals to people with busy schedules who need to pack a hard workout into a quick hour.

Gyms are increasingly offering the program as boot camp sessions gain national exposure on makeover television shows. Many boot camps in Southern California are taught at parks and beaches by former soldiers.

(CNN)