The Ab Workout of all Ab Workouts!

Holy moly, today's ab workout was definitely the most intense I've done in a long time, if not, ever! I've wanted to dedicate a day to just do this and decided today would be the day. Took me a total of about 30 minutes (that included some necessary water breaks) after 20 minutes on the stairmaster. My abs were screaming by the end!

Enjoy! ;)