Alternating Seated Dumbbell Side Bends.

Make every rep count.

1. 01

   Sit on the edge of a flat bench holding a dumbbell in each hand, arms relaxed at your sides with palms facing in.

2. 02

   Plant your feet flat and shoulder-width apart to stay stable.

3. 03

   Brace your core, keep your chest up, back neutral, and eyes forward.

4. 04

   Slowly side-bend to one side by letting the dumbbell track down your leg. Go only as far as you can without rounding or twisting.

5. 05

   Use your obliques to pull yourself back to center, then smoothly bend to the other side (keep the movement controlled—no bouncing).

6. 06

   Continue alternating sides until you hit your target reps.