Exercise Library
Dumbbell Sit Up
The dumbbell sit up is a weighted progression of the standard sit up, with a dumbbell held at the chest or pressed overhead to overload the rectus abdominis and hip flexors. Adding external load lets the abs be trained in lower, strength-focused rep ranges instead of endless bodyweight reps. Lifters use it when bodyweight sit ups have become too easy to drive further progress.
Primary muscle
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Equipment
Dumbbell
Category
Abs
How to Do the Dumbbell Sit Up
- Lie on your back with knees bent, feet flat on the floor, optionally anchored under a support.
- Hold a dumbbell of 5 to 15 kg with both hands against your upper chest.
- Exhale and curl your torso up one segment at a time, ribs toward hips, until your chest approaches your thighs.
- Keep the dumbbell pinned to your chest rather than swinging it forward for momentum.
- Pause briefly at the top with your abs contracted.
- Inhale and lower yourself under control, letting your spine roll back down vertebra by vertebra.
- Touch your upper back to the floor and begin the next rep without bouncing.
Common Mistakes
- Swinging the dumbbell: throwing the weight forward to generate momentum removes the abdominal work; the dumbbell stays glued to your chest.
- Yanking with the hip flexors: shooting straight up with a rigid spine makes it a hip flexor exercise; curl the trunk segment by segment.
- Dropping on the descent: falling back to the floor skips the eccentric, which is half the training effect of a weighted sit up.
- Loading too heavy too fast: jumping to a heavy dumbbell before owning the movement leads to form breakdown; add 2 to 3 kg at a time.
Track This Exercise in the App
Log your dumbbell sit up sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.