Let's talk about your core for a moment: it likely needs to be stronger. You need a strong core for just about every activity [1]yoga [2] to heavy lifting [3]. This simple workout is a great way to start building strength — it's great for beginners, too. And let's review: your core is more than your abs. That's right — it's your back muscles, too, along with your glutes (both the glute max on the back of your pelvis and your glute meds on the sides of your pelvis).

Click here for a printable version [4]. You can read up on the moves here [5].