Combine flexion abdominal training with stability abdominal training to build a pair of abs that are not only defined, but also strong and sturdy as well! This simple ab and core workout can be incorporated into nearly any workout routine. While it is basic, it trains the abs in two very critical ways to guarantee you not only build abdominals that will look good when at an appropriate body fat percentage, but will also be strong and sturdy. ~ Berceste