Intense 4-Minute NO-Equipment Ab Workout

WORKOUT DESCRIPTION
Go through the following circuit without rest between exercises.

1. Spiderman Climb – 30 seconds
2. Run in Place – 30 seconds
3. Rotating Planks – 30 seconds
4. Run in Place – 30 seconds
5. X-Body Mountain Climber – 30 seconds
6. Run in Place – 30 seconds
7. Squat and Thrust – 30 seconds
8. Run in Place – 30 seconds