This is one mean core workout. All you need is a yoga mat, and intense tenacity.
There are five exercises at five reps each and five sets, hence the name 555. Each exercise should be completed immediately after another with no rest. There is a ten second rest between each set.
Exercise #1 - Double Kick Backs
Get on the floor in the push up position. Bring both knees up to your chest and then kick them back five times.
Exercise #2 - Side To Sides
While in the push up position, swing your butt to the right and to the left five times. One on each side is one.
Exercise #3 - Extreme Crunches
Flip over onto your back. Complete five Extreme Crunches. Stick your legs out completely and then bring them to your elbows five times. Your arms should stay crossed over your chest.
Exercise #4 - Side Reaches
Lay flat on the floor and stick your legs in the air. With both hands, reach side to side touching the floor. One on each side counts as one.
Exercise #5 - Salaams
Get on your knees and touch your hands to the floor, keeping your arms straight. Then straighten up completely.