What is the best workout for flat abs?
Best answer: Top 10 Most Effective Ab Exercises : Bicycle Exercise Captains Chair Exercise Ball Crunch Vertical Leg Crunch Torso Track Long Arm Crunch Reverse Crunch Full Vertical Crunch Ab Rocker Plank on Elbows and Toes choose one, check this link
Best answer:
Top 10 Most Effective Ab Exercises :
Bicycle Exercise
Captain