Pictured here you see Cathe, Kristin, and Jenn D doing Cathe’s new Standing Metabolic Core routine. Standing ab exercises are great for working the muscles of your ENTIRE core…. your abs, your back, and your hips! These functional compound core moves will not only strengthen your core section and improve your overall posture, but they will also fire up your metabolism and give you a bit of a cardio workout as well.