Change Up Your Routine Every 3 Weeks or So
Never stay with the same routine, as you will peak and plateau at some point. Most people become comfortable with abs routines because of the pain and discomfort it takes to master just one routine. To let your abs out of their cage, you must vary your routine every three weeks.
Research has shown that most of muscle growth will plateau after three to four weeks of repetitive stimulus. So the best way to help vary your routine is to keep a detailed fitness journal. The preparedness you show will get you to next level and this will be the best summer ever.