There are a lot of exercises that take almost no thought to perform. (We’re looking at you, curls and calf raises.)

The kettlebell halo isn’t one of them, says Men’s Health Fitness Director B.J. Gaddour.

(For an incredible workout that’ll make your abs, quads, and biceps pop—check out the new METASHRED EXTREME transformation program from Men’s Health.)

The movement actually strengthens your mind-muscle connection. That’s because it requires full concentration and a team effort from your shoulders, triceps, back, and core to maneuver the unwieldy weight around your head. As a result, you can stay focused, boost intensity, and get the most out of every single rep.

Want to make the exercise even more complex? Turn the halo into what Gaddour calls the “angel of death” in one of two ways: 1) perform a lunge or goblet squat, and then stand up and do a halo rotation, or 2) maintain the bottom position of a lunge or goblet squat and then do a halo. Your mind and muscles won’t know what hit them.