Did this the first time today.hope I feel it tomorrow! ab ripper x -this seriously works! Did it summer of and had the closest thing to a six pack. Getting started on it again.
The 300 Ultimate Ab and Core Challenge Workout - AKA Ab ripper x, 25 reps each
300 rep ab workout for those students who want to show off their 6 pack during the summer
Ab Ripper Workout - I love this workout! I usually add planking as long as I can at the end and if I'm at the gym, leg lifts and things like that