The instructions and advice in the videos are in no way intended as a substitute for the guidance of your doctor. Even if done properly, every exercise has the potential for some risk of injury or even death. You are responsible for choosing the progression of fitness that seems right to you. Before you begin this program, you should have permission from your doctor to participate in moderately challenging to vigorous exercise. If you become uncomfortable, experience pain, numbness, breathlessness, disorientation, nausea, and/or bleeding from any body part, stop exercising immediately and seek help.