Hi, this is Dr. Levi demonstrating how to do a proper crunch. There are multiple types of crunches to do. I want to show you three different types of crunches so that you can work your obliques as well as your rectus and transverse abdominis. They are really easy to do. The goal here is to keep proper form. Keep your knees slightly bent, elevate and lift your shoulders upward. Do not hyper extend or hyper flex your neck. Keep your neck in a neutral position. What's really important and really wonderful about this exercise, as you work your abdominal muscles you will feel stronger, you will walk better, it changes your gait. It's really a great thing to do. Now I want to show you how to do this exercise from the side. Now, lay on your side, the other leg in front of you, the top leg straight, the bottom leg slightly bent. Now lift up to the side, as you lift your body up now, remember once again don't hyper extend your neck, don't hyper flex your neck, just bring your whole body up as a unit and contract your sides. What we are doing now, we are working and strengthening your serratus anterior, often called the obliques. Now I want to show you how to do a jackknife. This is a very advanced type of crunch. The goal here is to remember really easily that if you have back issues, if you have pelvic issues, this is not the exercise for you. However, if you don't have those things you want to really increase the intensity of your abdominal workout, try these. So take a look, extend your body completely. Now bring your hands and your feet up at the same time and go to touch your goes.