Assisted Sit-Up
- Target muscle
- Rectus Abdominis
- Synergist muscles
- Obliques
- Equipment
- Assisted
- Body part
- Waist
- Type
- Strength
The assisted sit-up is a core strength exercise that primarily targets the rectus abdominis (the front "six-pack" muscles), with the obliques assisting along the sides of the waist. The assistance — an anchored foot support, a partner holding your feet, or a band — stabilizes your lower body so you can complete full sit-ups with control, making it a good option for building abdominal strength when an unassisted sit-up is still too hard.
How to do the Assisted Sit-Up
- 1Lie on your back with your knees bent and feet flat, then secure your feet under a support, with a partner, or with a band so your lower body stays anchored.
- 2Cross your arms over your chest or place your fingertips lightly at the sides of your head without pulling on your neck.
- 3Brace your core and flatten your lower back lightly into the floor to set your starting position.
- 4Exhale and curl up, lifting your shoulders and then your back off the floor one vertebra at a time until your torso is upright.
- 5Keep your chin in a neutral position, looking forward rather than tucking it hard to your chest.
- 6Pause briefly at the top with your abs fully contracted.
- 7Inhale and lower yourself back down under control, reversing the curl until your shoulders return to the floor.
- 8Complete your reps, keeping each rep smooth, then release your feet from the support.
Form tips
- Lead the movement by curling your spine segment by segment instead of jerking your whole torso up at once.
- Keep tension on the abs by stopping just short of fully relaxing on the floor between reps.
- Use only as much foot assistance as you need — the more your hip flexors take over, the less your abs work.
- Breathe out as you rise and in as you lower to help maintain core bracing throughout the set.
Common mistakes
- Pulling on your head or neck with your hands, which strains the neck and shifts work away from the abs.
- Yanking yourself up with momentum, which removes tension from the rectus abdominis and makes the rep easier than it should be.
- Relying on the anchored feet to heave up with the hip flexors instead of curling with the abs, reducing the training effect on the waist.
- Lowering too fast and dropping to the floor, wasting the eccentric portion where much of the muscle work happens.
Frequently asked questions
What muscles does the assisted sit-up work?
It primarily works the rectus abdominis, the long muscle running down the front of your abdomen, with the obliques assisting along the sides of your waist.
Is the assisted sit-up good for beginners?
Yes. Anchoring your feet stabilizes your lower body so you can complete full sit-ups with control, making it a sensible way to build abdominal strength before progressing to unassisted sit-ups.
How many sets and reps should I do?
For most people, 2–4 sets of 10–20 controlled reps works well. Add reps or slow the tempo as your core gets stronger rather than rushing through with momentum.
What's a good alternative to the assisted sit-up?
An unassisted sit-up is the natural progression once your abs are strong enough. A crunch is a shorter-range option that keeps more tension on the rectus abdominis and less on the hip flexors.
Why do I feel assisted sit-ups in my hip flexors?
When you heave up using your anchored feet instead of curling your spine, the hip flexors take over. Use less foot assistance and focus on rolling up one vertebra at a time to keep the work on your abs.
