We’ve got a special guest for this week’s exercise!! As you can tell me both the name and the exercise itself, we’ve combined a couple exercises for this one. We use both the jack knife and bicycle situp in class quite often, so we decided to combine them. In this exercise, maintain the situp position (back flat, chest out, no rounding over). Each time you bring your knees in, rotate your core so that you elbow is touching the opposite knee. Trust me, after 20-30 of these bad boys the abs will be on fire!!!