Main Muscle Worked: Abdominals
Other Muscles Worked: None
Equipment: Dumbbell
Mechanics Type: Isolation 
 
Tips: Works the obliques. Stand straight up with your feet at shoulder width. Hold a dumbbell in your right hand with your palms in. Place your left hand on your waist. Keep your back straight. Bend to the right as far as you can, then bend to the left as far as possible. After finishing your desired reps, change the weight to your other hand and repeat. Bend at your waist only, not at your hips or knees! Can also be done with a barbell on your shoulders.