Exercises from the community
Seated Knee Raises (abs)
Seated Knee Raises strongly target the lower abs with a compact range of motion, making them an efficient tool for building a six-pack. Sit on the edge of a bench or chair and lean back slightly, holding the edge for support. Draw your knees up toward your chest using your lower abs, then extend your legs back out without letting your feet touch the floor between reps.
Medicine Ball Side Planks
Medicine Ball Side Planks firm the whole midsection, with the added ball work making them especially effective for the obliques and overall core strength. Prop yourself up on one forearm in a side plank, hips lifted so your body forms a straight line, and hold or reach a medicine ball with your free hand. Hold the position, keeping your hips square and lifted, then switch sides.
Crunches: Knees Up (abs)
Crunches: Knees Up keeps the legs elevated and hips flexed, which holds tension on the upper abs through the entire rep instead of letting it ease off between reps. Lie on your back with your knees bent and lifted so your shins are roughly parallel to the floor. Curl your shoulders and upper back off the floor toward your knees, then lower back down slowly without letting your feet drop.