The mountain climber is a core training staple that can help build a strong, muscular core, but are you sure you're even doing the exercise correctly?

For this movement, you shouldn't settle for anything other than perfect form—especially because it's such a simple, essential exercise that should serve as one of the centerpieces of your training plan. Let Men's Health fitness director Ebenezer Samuel, C.S.C.S. and associate fitness editor Brett Williams guide you through the mountain climber's subtleties, saving you from the bad habits that are keeping you from unlocking your fitness potential.

Before you get down into plank position and start pumping those legs, take note that it's extremely important to pay attention the movement here. Your back's positioning and posture are essential to make sure you're not putting ab gains at risk—so let's break down everything you need to know.