Dumbbell Straight Arm Twisting Sit-Up

Muscles worked

Setup

1. Lie flat on your back with your knees bent and feet planted firmly on the floor, hip-width apart.
2. Hold a single dumbbell with both hands, extending your arms straight up toward the ceiling directly over your chest.
3. Tuck your chin slightly and press your lower back into the floor to engage your deep core muscles.

How to do it

1. Exhale as you sit up, keeping your arms locked straight and pointed toward the ceiling throughout the entire ascent.
2. At the top of the sit-up, rotate your torso to one side, aiming the dumbbell toward the outside of the opposite knee.
3. Inhale as you slowly rotate back to center and articulate your spine back down to the starting position one vertebra at a time.
4. Perform the next repetition by twisting to the opposite side, continuing this alternating pattern.

Form checklist

• Keep your arms perpendicular to the floor (vertical) at all times to maintain a constant lever arm.
• Avoid swinging the dumbbell or using momentum; the movement should be slow and controlled.
• Keep your feet glued to the floor; if they lift, tuck them under a stable object or widen your stance.
• Ensure the rotation occurs in the torso rather than just moving your arms across your body.

Pro tips

• Focus on 'peeling' your spine off the mat one segment at a time to maximize abdominal recruitment and minimize hip flexor dominance.
• At the peak of the twist, squeeze your obliques for a one-second hold to increase time under tension.

Make it harder

• Perform the exercise with straight legs to reduce the leverage of your lower body and increase the demand on the abs.
• Hold the dumbbell in one hand only (unilateral) to significantly increase the anti-rotational stability requirement.

Frequently asked

What muscles does the dumbbell straight arm twisting sit-up work?

The dumbbell straight arm twisting sit-up primarily targets the abs and obliques, and also works the erector spinae and serratus anterior as secondary muscles.

What equipment do you need for the dumbbell straight arm twisting sit-up?

The dumbbell straight arm twisting sit-up uses dumbbell.

Is the dumbbell straight arm twisting sit-up good for beginners?

The dumbbell straight arm twisting sit-up is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.

Related exercises

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• 45 Degree Bicycle Twisting CrunchIntermediate · abs and obliques
• 45 Degree Lean Back Alternate Knee RaiseBeginner · abs and obliques
• 45 Degrees Arms PlankIntermediate · abs, deltoids, obliques, and pectorals