Roman Chair Sit-Up

intermediate · core_flexion

Setup

Read the machine before you get on: this is the sit-up direction of the Roman chair — you face the opposite way from the back-extension direction, with the pad supporting your lower back instead of your thighs. This is not the GHD sit-up: the GHD version drops well below horizontal, works differently and is not what this exercise teaches. Lock your ankles securely under the hooks and test with a small lean before committing your full weight. Sit on the hip pad with your thighs roughly at a right angle to your torso, arms crossed over your chest. Set the machine up so that at the deepest recline it allows, your torso is never lower than horizontal — if the frame allows going deeper, cap yourself there on purpose.

Execution

Start reclined back until your torso is level with the floor, no lower, with the belly already braced lightly.
Exhale and curl the torso up, leading with spinal flexion rather than snapping the neck or yanking with the hip flexors.
Curl up until the torso is roughly upright over the thighs; you don't need to fold all the way to your knees.
Pause one beat at the top, chin tucked slightly rather than the neck craning back.
Inhale and lower back down under control over 3 seconds, stopping right at torso-level-with-floor.
If you run out of strength mid-set, don't force the last rep: uncross your arms, press your hands into your thighs or the frame, push yourself back to sitting upright, and stop the set there.
Getting off: come all the way back to sitting upright, let your body settle, then free your ankles from the hooks and step down.

Breathing

Exhale as you curl up, inhale as you lower down. Don't hold your breath to force the last inch of the curl — with your ankles locked it is easy to strain against a held breath: if you have high blood pressure, heart disease, a hernia or get migraines, breathe out on every curl, keep the reps low, and stop if your head feels pressured or you get dizzy. If you have osteoporosis, a disc herniation, are pregnant or are newly postpartum, skip this exercise and ask the app or your doctor for an alternative.

Quick cues

Never recline past floor-level.
Lead with the spine, not a neck snap.
Curl up, no need to reach your knees.
Chin tucked, eyes toward your belly.
Out of gas, push with your hands, don't grind it out.

Common faults

Fault: Reclining lower than floor-level
Fix: Reset the machine's stop point, or watch your own position so you never go past horizontal.
Fault: Snapping the head and neck forward to create momentum for the curl
Fix: Keep the chin tucked in one place and initiate the movement from the upper abs first.
Fault: Using the hip flexors to yank the whole body up instead of flexing the spine
Fix: Slow down and feel the upper abs fold first, before the hips join in.
Fault: Forcing the last rep after running out of strength mid-set
Fix: Push your hands into your thighs or the frame to return to upright and end the set there.

Equipment

machine

Muscle groups

core