By doing pull-ups chin-ups and dips on the Body-Solid Knee Raise, Dip & Chin Up (FCD), you can effectively and efficiently build muscles in your arms, shoulders and back while using the Body-Solid Knee Raise, Dip & Chin Up (FCD). Add vertical knees raises, and you'll soon see an increase in definition of your lower abdominal muscles. Best of all, the benefits of these exercises on the Body-Solid Knee Raise, Dip & Chin Up (FCD) can be enjoyed by fitness enthusiasts of all skill and strength levels.