Exercise guide
Dumbbell Twisting Crunch Legs On Bench
- Intermediate
- Compound
- Rep-based
- Core
This variation isolates the upper abdominals and obliques by elevating the legs to stabilize the pelvis and adding a rotational load with a dumbbell.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Lie on your back on the floor with your calves resting on a flat bench and knees bent at a 90-degree angle.
- Hold a single dumbbell with both hands positioned at your chest or slightly tucked under your chin.
- Press your lower back firmly into the floor to engage your core before starting.
How to do it
- Exhale as you crunch your upper back off the floor, rotating your torso to bring one shoulder toward the opposite knee.
- Hold the peak contraction for a split second, feeling the squeeze in your obliques.
- Inhale as you slowly lower your torso back to the starting position with a controlled 2-second tempo.
- Perform the next repetition by rotating to the opposite side, alternating for the duration of the set.
Form checklist
- Keep your lower back glued to the floor throughout the entire movement.
- Rotate from your ribcage and shoulders rather than just pulling with your arms or neck.
- Maintain a small gap between your chin and chest to avoid neck strain.
- Ensure your legs remain relaxed on the bench; do not use them to pull yourself up.
Pro tips
- Focus on bringing your shoulder toward the opposite hip rather than just the elbow to maximize oblique fiber recruitment.
- Visualize 'wringing out' your midsection like a wet towel at the top of each twist.
Make it harder
- Hold the dumbbell with arms partially extended away from your chest to increase the lever arm and resistance.
- Add a three-second isometric hold at the peak of the rotation on every rep.
Frequently asked
- What muscles does the dumbbell twisting crunch legs on bench work?
- The dumbbell twisting crunch legs on bench primarily targets the abs and obliques, and also works the erector spinae as secondary muscles.
- What equipment do you need for the dumbbell twisting crunch legs on bench?
- The dumbbell twisting crunch legs on bench uses dumbbell.
- Is the dumbbell twisting crunch legs on bench good for beginners?
- The dumbbell twisting crunch legs on bench is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.