Engage your obliques by lifting your hips off the ground and holding a straight line from head to feet on each side.
Twist your torso from side to side while seated, engaging your obliques and touching the ground beside your hip with your hands.
Lie on your back, perform a bicycling motion by bringing opposite elbow and knee together, targeting your obliques.
Stand with feet shoulder-width apart, twist your torso and bring a weight diagonally across your body, engaging obliques.
Hold a weight in one hand, slowly bend at the waist towards the side with the weight, targeting your obliques.
Bend sideways towards the hand on your head, contracting your obliques while standing.