One of the primary functions of your

abdominals is to stabilize your spine. The following exercises are all

classified as stability exercises because there should be no movement. Focus on

squeezing your abdominals and buttocks, maintaining perfect posture, and

breathing easily. Exercises are progressed by holding each position longer. When

you can hold each position for a minute, progress the exercises by increasing

the instability (lift a leg or arm or one of each, perform exercises on an

unstable surface, etc.).