Decline Sit-Up
Setting the bench to a decline forces the abs to work against gravity through a bigger range and from a pre-stretched position at the bottom. That extra tension makes the decline sit-up noticeably tougher than the floor version and easy to progress by holding a plate. Use it when standard sit-ups stop challenging you.
- Equipment
- Bench
- Body part
- Abs
- Type
- Strength
- Browse by muscle
- Upper Rectus Abdominals
- Browse by movement
- Spinal Flexion
- Target
- Upper Rectus Abdominals
- Secondary
- Rectus Femoris
- Tertiary
- Abdominal External Oblique
How to do it
- 1
Hook your feet under the pads of a decline bench and lie back.
- 2
Cross your arms on your chest or hold a plate against it for extra load.
- 3
Exhale and curl up, leading with your chest and rounding your spine.
- 4
Rise until your torso is upright over your hips.
- 5
Inhale and lower under control, resisting gravity on the way down.
- 6
Stop just short of a full relaxed hang to keep tension on the abs.
Tips
- Control the descent; the lowering phase is where the decline earns its difficulty.
- Add a plate held on the chest only once your bodyweight reps are clean.
- Do not let your low back slam into the bench at the bottom.
Variations
Common mistakes
- The bench gets set to its steepest notch on day one, and the bottom of a steep decline is exactly where the lower back arches before the abs have any say in it.
- Feet are hooked so shallowly that the pads sit across the toes and the ankles slide out mid-set; push the feet in until the pads sit above the ankle.
- Hands go behind the head and pull, and with the torso hanging below the hips that pull lands squarely on the neck.
- The rep starts with a yank from the hip flexors because the decline makes the first inch the hardest; curl the head and shoulders up and let the hips follow.
- The set ends by swinging the legs off the bench while the feet are still hooked; take the extra second to unhook before standing up.
- Reps carry on after the abs are done and the hip flexors finish the job, which is easy to miss on a decline because the movement still looks the same from outside.
Frequently asked
- How many decline sit-ups should you do?
- Three sets of 10 to 12 reps at a shallow bench angle, resting 60 to 90 seconds. When 12 reps stay smooth, steepen the bench by one notch and drop back to 10 rather than adding reps, because the angle is the load here. Two sessions a week is enough. Be able to do 20 clean floor sit-ups before you set foot on a decline bench, since the steeper start position magnifies whatever your floor reps already look like.
- How do you make the decline sit-up easier or harder?
- Easier: flatten the bench toward horizontal one notch at a time, or move back to the floor for a set and return when the range feels controlled. Harder: steepen the angle, then change the arm position from crossed on the chest to fingertips at the temples to both arms reaching overhead, then slow the descent to three seconds. Once the steepest comfortable angle is easy at three sets of twelve, holding a plate is the next step.
- What is the decline sit-up good for, and who should avoid it?
- The decline puts the abs under tension from a pre-stretched bottom position and through a longer range than the floor allows, and the adjustable angle gives you a way to progress that a floor sit-up does not have. It suits anyone whose floor reps have stopped being difficult. Avoid it if your lower back complains at the bottom of the range, and think twice if hanging head-down makes you lightheaded, since a decline set keeps you there for thirty seconds at a time. Flatten the bench rather than pushing through either.
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