Upright Oblique Twist
The Upright Oblique Twist exercise works your back, shoulders, abs and obliques.
Get A-list abs. Upright Oblique Twist. Engage your abs to help support the 45-degree position the entire time. You'll really target your obliques if you hold the rotation for an extra count. Do both sides to complete one rep. Do 3 sets of 10 to 15 reps total.