Killer Abs

Lay down on the floor flat. Press your lower back into the floor and raise your legs straight up in the air. Rest your head on the floor and press your hips off the ground reaching your feet towards the ceiling by tightening your stomach. Reach as high as you can and slowly lower back down and repeat. Exercise description and photo by Michael Diebler.

Secure your feet either by placing them under something that won't move or by having a partner hold them. Start in the position shown above, leaning slightly back and clasping your hands in front of you. Moving only at the trunk, rotate to one side. At the end of your range of motion, quickly reverse the movement and rotate to the opposite side. Repeat in a rapid fashion for the full number of reps. You can also hold a weight or medicine ball to increase the difficulty. Exercise description by Bodybuilding.com

Lie back on the floor and elevate your legs up into the air. Make sure you keep your lower back pressed flat into the ground. Exhale and crunch forward to touch your toes. (Touching any part of your foot will work!) Remember, don't pull your chin down towards your chest. Keep your head in a neutral position. Exercise description by Bodybuilding.com

Works your obliques. In order to complete 1 repetition, each heel must be touched once. So, get into position, crunch over and touch your right heel once, then crunch over and touch your left heel once, and now you have completed 1 repetition. Lie down on the floor. Bend your knees and keep your feet 18-24 inches apart. Keep your arms straight down at your sides. Crunch forward and up about 3-4 inches. Remember to keep your lower back pressed flat against the ground. Keep your head in a neutral position. Alternate touching your right heel and then your left heel. Remember, touching each heel once is one rep! Exercise description by Bodybuilding.com