This yoga flow is great for toning the legs and glutes.   Start with 5 rounds and add more if you want to really feel the burn.  Make sure that you move slowly and focus on your breath and movement.  Also, draw your navel in toward your spine to help protect your back.  You can always drop to your knees if you need to in plank pose.  Be on the lookout for another fun flow that will work your core.  You can combine the 2 yoga flows for a challenging workout!