Cool, defined abs are generally mainly about low BF. Tip - exhale the air from the lungs on the positive motion of the movement - this will align the muscles and give a much better shape
cool thanks for the breathing tip i never knew that. also im getting mixed answers. should i be doing low reps weighted sit-ups or should i do what i am currently doing?
Get on a decline bench, do a full sit up...on the way down when you get horizontal to the floor...hold your postion for 5 seconds, and go back up. Do 5 sets of 5.
You can also do this using the reverse trunk crunch on a flat bench. Same principals apply.