I get this question several times a week. I recently wrote an article about ab exercises for To Your Health magazine that will be published soon. Once it’s published I’ll put it up on the site. But until it is published I’ll share this exercise maneuver with you. Use your kettlebell or dumbbell and hold it over-your-head with your arm locked out. Simply stand tall (think tall spine) and walk around for 60 seconds. To make this movement even more challenging for your core, try holding different weights in each hand–for example, a 5-pound dumbbell in your left hand and a 15-pound kettlebell in your right hand. This exercise loads the abs, core and arms.