This ab workout can be done on the floor or on a vibration plate for faster results.
Start in a standard press up position with your hands shoulder width apart. Extend your right arm in front of your body and extend your left leg out behind you. Try not to wobble! Tensing your abs will help. Then return your arm and leg to their original position.
Make sure to alternate your arms and legs diagonally; lift your right arm and left leg, return to centre, then lift your left arm and right leg. Beginners should repeat this for 30 seconds.
You can easily transfer this workout to a vibration plate. Doing an abs workout on a vibration plate works the same muscles as on the floor but increases the intensity.