Hi, I'm Juliet Kaska and this is how to plank. The plank is one of my absolute favorite exercises. It works your entire body, the core, the legs, the shoulders, the upper back. But, there's a lot of nuances in a plank that can get lost and then you won't do the exercise effectively and won't get the most bang for your buck. So to sit up for the plank lay a mat down on the floor, lower down onto your knees and your forearms, extend all ten fingers out and line the elbow up with the middle finger. As you get stronger in your plank, you can lift one foot off the ground, keeping stability in your hips. In other words, don't let your hips slide out from side to side, completely stay straight and then lift and lower the leg or you can also open it to the side to greater challenge your hip stability. Another advantage of doing the plank is that you can drop your knees down to the ground and then extend back up. This will be extra effective for your lower abdominals which of course who doesn't want to to work on those.