Legs Raised Dumbbell Sit-Up — how to, muscles worked, alternatives

How to do the Legs Raised Dumbbell Sit-Up

Lie on your back, legs straight, heels just off the floor.
Hold one dumbbell by both ends above your chest, arms straight.
Sit up to 45–60 degrees, reaching the dumbbell over your thighs.
Slowly lower back down until your upper back touches the floor again.

Full technique — 7 steps

Lie on your back with legs straight and together and hold one dumbbell by both ends.
Raise the dumbbell over your chest with your arms straight.
Lift your heels a few inches off the floor and press your lower back into the floor.
Exhale and sit up until your torso is 45–60 degrees from the floor, reaching the dumbbell over your thighs.
Keep your arms straight so the dumbbell moves only with your torso.
Pause briefly at the top, keeping your legs off the floor.
Lower your torso to the floor under control, keeping your legs raised.

Common mistakes

Swinging the torso with momentum
Dropping heels between reps
Letting the lower back arch
Pulling the head forward
Bending and straightening the elbows

Form cues

Keep arms straight
Keep knees straight
Lift with abs first
Keep feet off floor
Exhale on the way up

Substitutes by equipment

Same muscles, same movement — pick the version you have the gear for.

Where to start and where to go next

Same muscles, same movement. Too hard for now — step down; once it gets easy — step up.

Easier Dumbbell Straight Arm Crunch Beginner
Easier Dumbbell Toe Touch Crunch Beginner
This exercise Legs Raised Dumbbell Sit-Up Intermediate
Harder Barbell Overhead Sit-Up Intermediate
Harder Standing Ab Wheel Rollout 120% of bodyweight

Too hard for now? Start with the Dumbbell Toe Touch Crunch.

Quick answers

What muscles does the Legs Raised Dumbbell Sit-Up work?

Primary: Abs 9/10. Also works: Obliques 5/10.

When should I do the Legs Raised Dumbbell Sit-Up in a workout?

Finisher. Goes last, once the heavy work is done. ≈ 6 min with rest.

How many sets and reps of the Legs Raised Dumbbell Sit-Up?

Strength: 3–4 sets of 8–10 reps, rest 1 min 30 s, 2 reps in reserve. Muscle growth: 3–4 sets of 10–15 reps, rest 1 min, 2–3 reps in reserve. Endurance: 2–3 sets of 20–25 reps, rest 45 s, 3–4 reps in reserve.

What can I do instead of the Legs Raised Dumbbell Sit-Up?

No equipment: Ab Wheel Straight Arm Crunch, Alternating Tuck-Up. Resistance bands: Lying Resistance Band Crunch, Lying Resistance Band Knee Tuck. Medicine ball: Medicine Ball Toe Touch Crunch, Medicine Ball Straight Arm Crunch. Suspension trainer: Suspension Trainer Hanging Knee Raise, Suspension Trainer Hanging Leg Raise.