20 minute ab routine XD

First 5 minutes:

Plank position for 15 seconds

Rest 15 seconds

Repeat until 5 minutes is up.

The important thing is to keep your back flat!

Second 5 minutes:

Bicycle crunches at a steady pace for 15 seconds

Rest 15 seconds

Repeat until 5 minutes is up.

The important thing is to make sure your elbows actually touch your opposite knee by twisting your upper body.

Third 5 minutes:

Reverse crunches at a steady pace for 15 seconds

Rest 15 seconds

Repeat until 5 minutes is up.

Last 5 minutes:

Star crunches for 15 seconds

Rest 15 seconds

Repeat until 5 minutes is up.

How to do it-lie down with hands at your sides and feet together flat on the floor. Raise your legs straight up (this is leg lifts), then move your feet apart and reach your hands and lift your shoulder blades and push forward (works like crunches). Finally, do a reverse crunch and let your legs slowly go back down (reverse leg lift).

This is a 3 in one move, and very effective for toning your stomach.

This really works, and since it's an interval workout and you change every 15 seconds, it doesn't get very boring. Plus all the resting makes it not as intense :)

If you're more advanced or would just like to make it harder or more intense, just decrease the amount of rest you have.