Standing Side Crunch with Dumbbells No mat needed, just grab a pair of dumbbells and feel that oblique burn! How to do it: Stand with a dumbbell in each hand, arms down by your sides. Keep your chest up and core tight. Slowly lean to one side, lowering the dumbbell toward your knee. Engage your obliques to pull yourself back upright. Repeat on the other side, alternate or complete reps one side at a time. Muscles working: Obliques – tighten & shape your waist Core – stabilizes your torso Shoulde