Seated Knee Up
Start
When you've fried your abs and feel the need for a couple more sets, finish up with this six-pack-building crunch.
Execution
After leaning your torso forward while bringing knees toward the chest, exhale toward the top of the movement. Crunch your abs at the top, then slowly return to the start position
Crunch
Use this basic move to tighten your midsection
Start
Lie on the floor with your knees bent and hands behind your head.
Execution
Curl up, bringing you torso toward your knees, concentrating on crunching your abs muscles as you come up. Try to get your shoulder blades off the floor. Don't pull on your head or press your chin into your chest.
