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 today's Groupon: for $50, you get a one-on-one personal training session and a 30-day unlimited membership to CrossFit Owasso (a $160 value).

CrossFit Owasso's experienced trainers help students bolster their bone cages with the CrossFit training program. One-on-one personal training eases beginners into the workout regime, providing special attention with a trained instructor before launching into the 30-day pore-drenching program. The muscle-magnifying method uses varied, functional movements that have been employed by cage fighters and military personnel in the past, helping trainees lose weight, build muscle, and execute perfect form while running from a swarm of bees. Sweaty students work toward improving 10 physical skills, including cardiovascular endurance, flexibility, and coordination by executing, fast, varied routines directed each day by the instructors, who tweak load and intensity to accommodate fitness fans of all skill levels. Bench-press this link with your cursor's muscles to view the studio's schedule.