The kettlebell halo is a core training staple that can help to bulletproof your shoulders, 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 halo's subtleties, saving you from the bad habits that are keeping you from unlocking your fitness potential.

Before you grab a kettlebell and put it into orbit around your head, take note that it's extremely important to pay attention the movement here. Your positioning and posture are essential to recruiting the right muscles to keep your delicate shoulder joints safe and healthy—so let's break down everything you need to know.