This document provides instructions for a sit up routine to develop a six pack. It begins with an introduction to the benefits of the routine and progresses through 15 different abdominal exercises from easiest to hardest. It then outlines beginner, intermediate and advanced routines consisting of combinations of the exercises. Tips are provided such as training on an empty stomach and minimizing rest between sets to maximize results. The goal is to follow the routines daily or every second day to build core strength and achieve a defined six pack.