if u want to tone the abs work them everyday they are one of the muscels that u can work everyday im 16 and my ab workout which tends to work is 25 situps, then 100 crunches, 25 more situps, 100 crunches, 50 toe touches, then 25 hip tilts take maybe 5 sec break in betweens then go up till jsut your shoulder blades are off the ground hold for aorund 30 sec then do 50 curnches going no lower then that 3 of those finishes out your workout.