Stability Ball Abs in 20
Inner thigh crunches
Forearm plank with ball in between thighs - tailbone tucks, knee taps
1/2 roll back + twist
Ballin' - Stability Ball Workout
If you don't have a stability ball just yet, you can use a pillow or do all of this without the ball. It's still a great workout!
Planks - shifts, leg lifts, shoulder taps
Ball below the taps of the shoulder blades - crunches, pulses, table leg crunches, add twist,