How to Do the Decline Sit-Up
The decline sit-up adds range of motion and gravity resistance compared with a floor sit-up. You hook your feet on a decline bench and sit up, loading the abs and hip flexors. It's a good option once floor crunches feel too easy, and you can hold a plate to progress.
Log every set of your Decline Sit-Up in Superlift
Muscles worked
Primary
- Abs
Secondary
- Quads
How to do the Decline Sit-Up
- 1
Set a decline bench and hook your feet under the pads.
- 2
Lie back with knees bent and cross your arms over your chest.
- 3
Brace your abs and curl your torso up toward your knees.
- 4
Rise until your torso is upright without yanking your neck.
- 5
Pause briefly at the top.
- 6
Lower slowly until your shoulder blades near the bench.
Form cues to remember
- Curl up, don't jerk up
- Keep your chin neutral
- Lower for two to three seconds
- Keep your lower back round, not arched
Decline Sit-Up video tutorial
Common mistakes
Pulling on the neck
Cross arms on your chest and keep your head in line with your spine.
Using momentum
Lower slowly and pause at the bottom instead of bouncing.
Setting the bench too steep
Use a gentler angle until you can control the lowering.
Hip flexors taking over
Curl the ribs toward the pelvis first before the hips move.
Sets and reps
| Muscle growth | 3 sets of 10–15 reps, 60–90 seconds rest |
|---|---|
| Strength | 3–4 sets of 8–10 reps holding a 10–25 lb (5–11 kg) plate |
| Endurance | 2–3 sets of 20 reps with bodyweight |
Sit-ups can strain the lower back and neck if you jerk or rush. Anyone with back problems should start with a shallow decline and avoid adding weight.
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Decline Sit-Up FAQ
Decline sit-up vs. regular sit-up?
The decline raises the load by lengthening the range and adding gravity. A regular sit-up is easier and better for beginners.
Are decline sit-ups bad for your back?
They're fine for most people when done slowly. Jerking your torso up or using heavy weight with a rounded neck is what causes trouble.
What muscles does the decline sit-up work?
Mostly your abs, with the hip flexors and quads helping anchor and lift you.
