Extra Decline Sit-up
- Target muscle
- —
- Equipment
- Body weight
- Body part
- Waist
- Type
- Strength
The extra decline sit-up is a bodyweight core exercise that trains the abdominals, especially the rectus abdominis. Performed on a decline bench with your feet anchored higher than your head, it increases the range of motion and resistance over a flat sit-up, making it a tougher way to build trunk-flexion strength.
How to do the Extra Decline Sit-up
- 1Set the bench to a moderate decline and sit at the lower end with your knees bent over the upper edge.
- 2Hook your feet securely under the foot pads or roller so your legs stay anchored higher than your head.
- 3Lie back until your torso is along the bench, keeping a slight bend in your knees and your chin gently tucked.
- 4Cross your arms over your chest or place your fingertips lightly at the sides of your head without pulling on your neck.
- 5Brace your abdominals and exhale as you curl your torso up, leading with your chest toward your knees.
- 6Continue lifting until your upper body is well past vertical, keeping the movement controlled rather than swinging.
- 7Pause briefly at the top and squeeze your abdominals.
- 8Inhale and lower your torso back down under control until your shoulders return to the bench.
- 9Complete your reps, then unhook your feet and sit up carefully to finish.
Form tips
- Move with your abdominals, not momentum — slow, controlled reps keep tension on the muscles through the full range.
- Keep your chin gently tucked and your neck neutral so your abs do the work instead of your neck muscles.
- Exhale as you crunch up and inhale on the way down to maintain a strong brace.
- Adjust the decline angle to set the difficulty — a steeper decline makes each rep harder.
- Lower under control all the way down rather than dropping, so you keep the abdominals loaded on the descent.
Common mistakes
- Yanking on your head or neck to start the rep, which strains the neck and takes load off the abs.
- Using momentum to swing up instead of curling, which reduces tension and makes the exercise less effective.
- Lowering too fast or letting your back slam down, wasting the eccentric portion and risking your lower back.
- Setting too steep a decline before you have the strength, which encourages cheating and poor form.
- Holding your breath through the rep, which raises pressure and limits how hard you can brace.
Frequently asked questions
What muscles does the extra decline sit-up work?
It mainly works the abdominals, particularly the rectus abdominis along the front of your trunk, which flexes your torso toward your hips as you curl up.
Why use a decline bench instead of doing sit-ups on the floor?
Anchoring your feet higher than your head on a decline increases the range of motion and resistance, so each rep is harder and challenges the abdominals more than a flat sit-up.
Is the extra decline sit-up good for beginners?
It is more demanding than a floor sit-up, so beginners should start on a shallow decline or master flat sit-ups first, then increase the angle as their core strength improves.
How many sets and reps should I do?
For core endurance, 2–4 sets of 12–20 controlled reps works well. Increase the decline angle or slow your tempo before chasing very high rep counts.
