10 Best Exercises For Killer Abs

3. Seated Barbell Twist

Seated barbell twists work your obliques. Ideally, your elbow should be over the opposite knee, but if it hurts at first, move it as far away as possible, as you’re more likely to injure yourself the first time. You can start with two sets of 10 repetitions and gradually work your way up to three sets of 15 to 20 repetitions.