4) Hanging Serratus crunches.

The aim of the exercise is to single out and work the serratus the best possible way.
The subject grasps the chin-ups bar with a wide-grip palms facing forward. He or she then lifts (not swings) his/her legs up to one side. This’ll make the serratus on the side he/she lifted his/her legs to, contract, and stretch on the opposite side. The motion has to be repeated for the other side then over again.
Extra considerations: - movement in this exercise need to be slow and controlled. You mustn’t swing your legs from one side to the other.