Take 5 Minutes to Set Your Abs on Fire If you have five Minutes and a place to plank, you have the time and the space to work on Your six-pack. These five exercises tone and strengthen all four layers of abdominal muscle to create a strong and sculpted core. Directions: Perform each exercise for one minute. Keep Your movements slow and controlled to maintain good form for all Your reps. Related Stories:Targeted Toning: Quick Butt-Lifting WorkoutFit in 5: ***y Arms and Sleek Shoulders Workout