Should I use a heavy weight for this exercise?

It is better to start with a moderate weight to ensure you do not strain your lower back or lose proper form. High repetitions with controlled movement are more effective for most training goals.

Will this exercise make my waist look wider?

When performed as part of a balanced routine, this exercise builds functional strength without excessive hypertrophy. Significant widening is generally only a concern with extremely heavy powerlifting-style volume.

Why shouldn't I hold two dumbbells at once?

Holding a second dumbbell creates a counterbalance effect that reduces the work required by your core muscles. Using a single weight forces your obliques to work harder against gravity.

Dumbbell Side Bend Guide | Flexión Lateral Tutorial

Learn the correct technique for the flexión lateral (side bend) to strengthen your obliques and core stability with our step-by-step guide.

How to Perform

Stand upright with your feet shoulder-width apart and hold a dumbbell in one hand with your palm facing your body.
Place your free hand behind your head or flat against your thigh to maintain a neutral spine.
Bending only at the waist, lower the dumbbell toward your knee while keeping your hips stationary.
Pause for a moment at the bottom of the movement when you feel a stretch in the opposite side of your torso.
Use your obliques to pull your torso back to the starting upright position.
Complete the desired number of repetitions on one side before switching the dumbbell to the other hand.

Common Mistakes

Using a dumbbell in both hands simultaneously which negates the resistance on the obliques.
Leaning forward or backward instead of maintaining a strictly lateral plane of motion.
Rotating the hips or shoulders during the descent.
Using momentum or swinging the weight instead of lifting with controlled muscle tension.

Muscles Worked

Primary movers

Obliques

Stabilizers

Quadratus lumborum
Erector spinae
Transverse abdominis

Related Guides

2 Handed Kettlebell Swing — Strength
3D lunge warmup — Strength
4-count burpees — Strength

Obliques · Strength