+ TIMER 00:00 : START 30 sec 60 sec 2 min Reset Pause Restart + SETS 1 2 3 4 5 Abdominal muscles are body armour. They help protect your vital organs from damage. They keep your body performing at maximum and, when the clothes come off, they make you look terrific. This workout is the anvil where that armour is fashioned. Extra Credit: 30 seconds rest between sets.