After 6 to 12 reps, switch and train the other side.Hold the crunched position for a few seconds for full effect. Bend in the opposite direction to get a full stretch, then 'crunch' the serratus down and forward slightly.This is a form of touch training and will help you target and contract the serratus. Place your right hand on the left serratus.If your left side is facing the handle, reach up with your left hand and grab it. Stand sideways to a high cable with a D-handle.Not bad advice, but you can directly target this muscle group. In fact, many strength coaches say to forget about targeting the serratus and instead just get your body fat very low and do lots of overhead presses and pullovers, which bring the serratus into play. Problem is, it's kinda tough to train directly.
The serratus anterior is that cool-looking muscle on the side of the upper abs area, sometimes referred to as the 'boxer's muscle.' It isn't technically an abdominal muscle, but it completes the look of a muscular, shredded torso.