Exercises from the community
Modified Knee Raises (abs)
Modified Knee Raises isolate the lower abs with an easier range of motion than a full hanging or straight-leg raise, making them a good stepping stone toward tougher lower-ab work. Sit on the edge of a bench or lie on your back with knees bent. Curl your knees up toward your chest by contracting your lower abs rather than swinging with momentum, then lower back down with control until your feet are just short of the floor before repeating.
Raise Big Toes
With raised arches, lift only both big toes, keeping the other four on the ground, then lower them back down. Repeat this slowly 5-10 times. This exercise and the next one require a gradual re-learning of lost muscle control. When you first try, you might not be able to move certain toes independently. Keeping your spine straight and long, you can bend your knees and bend down forward to use your fingers to help hold the other toes down while you are learning the new muscle control.
Reaching Medicine Ball Sit-ups
Reaching Medicine Ball Sit-ups use the weight of the ball to improve visible upper ab definition, adding resistance right where a standard sit-up is weakest. Lie on your back with knees bent, holding a medicine ball at your chest. Perform a full sit-up, reaching the ball forward and up as you reach the top position, then lower back down with control to the starting position.