Begin with a barbell in a landmine attachment or wedged into a corner with small sand bags. Squat down at the free end of the barbell (either start with an empty bar or add weight). Place one hand at the top of the bar (underhand grip) and the other right below the weight (overhand grip). Raise the bar to shoulder-height and press out with straight locked arms. Make sure you rotate your torso and hips as you lower the weight down to the opposite hip. “Now, torque your hips while maintaining straight posture and lock your arms in order to swing the bar up and over your body to the opposite hip,” Krajewski says. Keep rotating back and forth; you'll feel the burn in your obliques.