Abdominal flutter kicks predominantly targets your abdominal muscles, working the lower abs in particular. They are also a superb workout for your hip flexors, where a large extent of the effect is felt when you are performing repetitions.
Exercise Instructions: Start by lying flat on your back on a mat with your arms by your sides and your palms down. Extend your legs fully out with a slight bend in your knees. Lift your heels about 6 inches off the floor. Make small, rapid up and down scissor-like motions with your legs. The key is to focus on having your midsection do all the work and to keep your abs constantly contracted throughout the exercise