Russian Twist
Boat Exercise
One leg plank
Scissors Exercise
Elbow to knee Crunches
Mountain Climbers
Cross-Body Mountain Climbers
Walk the Plank and rotate
Hip Raise
Reverse Crunches
Side leg Toe-Touch Crunch
V Crunch
Plank to Push-up
Warrior Balance
Perform each exercise for thirty seconds before moving to the next. I can definatly see a difference and I have only been doing this circuit for two weeks three times a week.