Exercises from the community
Running
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.
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.