These are the 5 ab most effective ab exercises to tone and tighten your abs and help you flatten your tummy. 1. Saturn Rings, 2. Weighted Roll Up, 3. Double Leg Lift, 4. Criss Cross, and 5. Hollow Rock. Do it with me now Top from PrAna: Shorts from: Song: Let s Work Out by Addison Yarborough Check it out here: CHECK OUT MY DVD: