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  5. Shoulders
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  7. Dumbbell Overhead Sit Up With Legs On Bench

Exercise guide

Dumbbell Overhead Sit Up With Legs On Bench

  • Intermediate
  • Compound
  • Rep-based
  • Shoulders
  • Waist

This compound core exercise isolates the abdominals by elevating the legs to reduce hip flexor involvement, while the overhead weight adds a significant stability challenge for the deltoids and upper back.

Reviewed by the Crucible Fit team · Updated June 2026

Watch the Dumbbell Overhead Sit Up With Legs On Bench demonstrationVideo and instructions for every movement are in the Crucible Fit app.

Muscles worked

Primary

  • Abs
  • Deltoids
  • Obliques

Secondary

  • Erector spinae
  • Hip flexors
  • Quadriceps

Equipment

  • Dumbbell

Setup

  1. Lie on your back on the floor with your calves resting on a flat bench and knees bent at a 90-degree angle.
  2. Hold a single dumbbell with both hands by the bells, or one in each hand, directly over your chest with arms fully extended.
  3. Press your lower back firmly into the floor and tuck your chin slightly to maintain a neutral cervical spine.

How to do it

  1. Exhale and engage your core to peel your spine off the floor, keeping the dumbbell pointed vertically toward the ceiling at all times.
  2. Continue the sit-up until your torso is upright and the dumbbell is directly overhead, aligned with your ears.
  3. Inhale as you slowly reverse the movement, lowering your back to the floor one vertebra at a time with a controlled 3-second eccentric phase.
  4. Maintain a steady tempo, ensuring the weight does not swing forward to create momentum.

Form checklist

  • Keep the dumbbell path strictly vertical; do not let it drift toward your knees.
  • Ensure your lower back makes contact with the floor before starting the next repetition.
  • Keep your arms locked out and shoulders active throughout the entire range of motion.
  • Avoid 'kipping' or using your legs to pull yourself up; keep the lower body relaxed on the bench.

Pro tips

  • Focus on 'punching' the weight toward the ceiling as you rise to maximize serratus anterior and deltoid engagement.
  • Imagine your spine is a piece of tape being peeled off the floor to ensure maximum abdominal recruitment over hip flexor dominance.

Make it harder

  • Hold the dumbbell in one hand to create an asymmetrical load, significantly increasing oblique and rotational stability demands.
  • Add a three-second pause at the peak of the contraction when the torso is fully upright.

Frequently asked

What muscles does the dumbbell overhead sit up with legs on bench work?
The dumbbell overhead sit up with legs on bench primarily targets the abs, deltoids, and obliques, and also works the erector spinae, hip flexors, and quadriceps as secondary muscles.
What equipment do you need for the dumbbell overhead sit up with legs on bench?
The dumbbell overhead sit up with legs on bench uses dumbbell.
Is the dumbbell overhead sit up with legs on bench good for beginners?
The dumbbell overhead sit up with legs on bench is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.

Related exercises

  • 45 Degrees Arms PlankIntermediate · abs, deltoids, obliques, and pectorals
  • Alternate Knee Raise Side ReachBeginner · abs, deltoids, and obliques
  • Alternate Leg Lift Tap Arms CircleIntermediate · abs, deltoids, obliques, and pectorals
  • Alternate Single Leg Raise PlankIntermediate · abs, deltoids, hamstrings, and obliques

Train it with Crucible Fit.

Every movement in this library is in the app with video and instructions, ready for your own sessions on the days between Crucibles. Your first Crucible is on us.

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