This exercise works the obliques.

side bend

side bend
Steps
Stand with your feet shoulder width apart, your knees slightly bent and your abs drawn in.
Grab a dumbbell in one hand and standing straight upright bend at the waist as far as possible to one side.
Slowly return back up to the starting position.
Switch the dumbbell to your other hand and repeat the exercise.
Advice
Be careful to bend only at your waist and not at the hips or knees

bicep-hammer-curl

bicep-hammer-curl
Start
Place two dumbbells to sides, palms facing in, arms straight.
Steps
With elbows to the sides, raise one dumbbell until forearm is vertical and the thumb faces the shoulder. Lower to original position and repeat with alternative arm.

bridge

bridge
Steps
Lie on your back with your knees bent and your feet flat on the floor.
Lift up hips off the floor as you draw your abs in.
Hold this for the desired length of time

Side Plank
Lay down on the ground on one side. Lift your body utilising one forearm and support it in this raised position for the necessary time.
Lower your body and repeat on the other side.
Remember to maintain your head, neck and body in a straight line.

Pushup and Row
Begin by positioning the dumbells onto the ground and getting into a pushup position holding onto the dumbells.
Continue into a pushup and then extend your arms into a complete pushup.
Then row one dumbell up to chest level and return to the ground. Duplicate with the other arm. This is thought as being one repetition.
Repeat this cycle until the required repetitions are finished.
Make certain you keep your abdominals tight and back flat throughout this motion.