Weighted Decline Sit-Up
- Secondary muscles
- Hip Flexors, Spine
- Body part
- Core
- Position
- Lying
- Laterality
- Bilateral (both sides together)
- Category
- Strength
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Hugging a plate to your chest on the decline bench turns the sit-up into a loadable lift you can progress like any press or row: add weight when sets of 10 to 15 get crisp. Between the bench angle and the plate you have two dials to turn, which is why it outgrows plain decline sit-ups quickly.
How to do the Weighted Decline Sit-Up
- Lie flat on a decline bench with your feet secured under the foot pads.
- Place your hands behind your head or across your chest.
- Engage your abs and slowly lift your upper body off the bench, curling forward until your torso is perpendicular to the ground.
- Pause for a moment at the top, then slowly lower your upper body back down to the starting position.
- Repeat for the desired number of repetitions.
Tip: Reach the hands forward along the thighs and think of peeling the spine off the floor from the top down.
Muscles worked
Primary
Abs · Core
The abs curl the torso off the floor and then control it back down, and they do the most work in the first 30 degrees of the movement before the hip flexors take over.
Secondary
- Hip Flexors — The hip flexors pull you the rest of the way up once the abs have curled the ribs, and they will dominate if the feet are anchored and the range is rushed.
- Spine
Common mistakes
- Yanking the neck — hands behind the head should support only; keep the elbows wide or cross the arms on the chest.
- Jerking up flat-backed — the spine should curl up one segment at a time starting from the head, not lift as a rigid board.
- Dropping back down — the lowering half is where the abs work hardest, so take two or three seconds to come down.
- Anchoring the feet — this lets the hip flexors do everything; if you must anchor, keep the knees bent and focus on curling the torso.
Where it fits in a workout
Sit-ups go at the end of a session with the other core work. Superset them with a back extension to balance the front and back of the trunk.
How many sets, how heavy and how hard: see what the ACSM position stands support.
Variations and alternatives
Similar exercises
Without weighted
When to talk to someone
- Chest discomfort, feeling faint or lightheaded, or trouble breathing during or after exercise can be signs of a heart attack. In the US, call 911 right away; elsewhere, call your local emergency number.
- Heart, metabolic or kidney disease, or symptoms like these when you are active: talk to your doctor before you start or step up training.
- Pregnant: ask your obstetric care provider which exercise suits you.
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More exercises
Sources
- ACSM position stand on exercise quantity and quality (Garber et al., 2011)
- ACSM preparticipation health screening (Riebe et al., 2015)
- ACOG Committee Opinion No. 804 on exercise in pregnancy (2020)
- CDC: About Heart Attack Symptoms, Risk, and Recovery (2024)
Sources checked on October 17, 2026. Full citations are in the exercise library.
Animation and exercise data: ExerciseDB, licensed to SetGrip. General information, not medical or coaching advice.