Exercise guide
Dumbbell Seated Side Bend
- Beginner
- Compound
- Rep-based
- Waist
The seated side bend isolates the obliques by stabilizing the pelvis, forcing the lateral core muscles to drive the movement through spinal flexion. This variation minimizes lower back strain and prevents the legs from assisting in the movement.
Reviewed by the Crucible Fit team · Updated June 2026
Muscles worked
Setup
- Sit upright on the edge of a flat bench with your feet planted firmly on the floor, wider than shoulder-width apart for stability.
- Hold a dumbbell in one hand with a neutral grip (palm facing your body) and let it hang straight down at your side.
- Place your non-working hand behind your head or firmly on your hip to keep your shoulders square.
How to do it
- Inhale and slowly lower the dumbbell toward the floor by bending your torso laterally to the side, keeping your chest facing forward.
- Lower until you feel a deep stretch in the opposite side obliques, ensuring your hips do not lift off the bench.
- Exhale and contract your obliques to pull your torso back to the starting upright position.
- Complete all reps on one side before switching the dumbbell to the other hand.
Form checklist
- Keep both glutes firmly planted on the bench at all times.
- Move strictly in the frontal plane, avoiding any forward or backward leaning.
- Keep your neck neutral and aligned with your spine throughout the movement.
- Ensure the movement is driven by the waist, not by pulling with the arm or shrugging the shoulder.
Pro tips
- Focus on the 'weighted stretch' at the bottom of the movement to maximize muscle fiber recruitment in the obliques.
- Visualize the oblique on the opposite side of the dumbbell shortening to pull your ribcage back toward your hip.
Make it harder
- Slow the eccentric (lowering) phase to 3-4 seconds to increase time under tension.
- Hold the non-working arm straight overhead to increase the lever length and the demand on the core.
Frequently asked
- What muscles does the dumbbell seated side bend work?
- The dumbbell seated side bend primarily targets the obliques, and also works the erector spinae as secondary muscles.
- What equipment do you need for the dumbbell seated side bend?
- The dumbbell seated side bend uses dumbbell.
- Is the dumbbell seated side bend good for beginners?
- Yes. The dumbbell seated side bend is a beginner-friendly movement and a strong foundation to build on.