Pulling with the arms
Keep your arms passive and let your abs curl you forward.
Isolation · Machine
Machine Ab Crunch
The machine ab crunch has you curl your torso forward against a weighted pad or handles, letting you load the abs and track progress like any other lift. It suits anyone who wants stronger abs and finds bodyweight crunches too easy to progress.
- Primary
- Abs
- Starting rep range
- 12–20 reps
- Target effort
- 1 reps in reserve
- Progression
- 5 kg / one stack step
Muscles worked
The rectus abdominis flexes the spine, pulling the ribs toward the pelvis, with the obliques assisting. If you hinge at the hips instead of rounding the spine, the hip flexors take over much of the work.
How to set up
- Adjust the seat so the pads or handles sit at your upper chest or shoulders.
- Hook your feet under the rollers or place them on the footrest.
- Grip the handles lightly or set your arms on the pads.
- Sit tall against the backpad to start.
How to do each rep
- Exhale and curl your ribs down toward your hips, rounding your spine.
- Squeeze your abs at the bottom for a moment.
- Return over 2 seconds until your torso is upright and the abs are stretched.
- Move through your spine; your arms just hold position.
Common machine ab crunch mistakes
Hinging at the hips
Think of shortening the distance between ribs and pelvis instead of folding forward from the hips.
Rushing reps
Control both directions to keep tension on the abs.
Sets, reps, and progression
Surpass starts the machine ab crunch at 12–20 reps with about 1 reps in reserve. As an isolation exercise it fits well after your main compound lifts.
Use 10-20 reps and add one pin once all sets hit the top. Train abs two or three times a week with a few hard sets rather than endless light reps.
Know what to lift next time
Surpass shows what you lifted last time beside a target for this set, and adjusts it from your reps and RIR. Free on iPhone, no account needed.
Machine Ab Crunch alternatives
These train the same main muscles. Swap when the equipment is busy, something hurts, or progress has stalled for several weeks.
Questions
Is the ab crunch machine effective?
Yes. It lets you add resistance and progress over time, which helps build ab strength and thickness.
Will crunches give me a six-pack?
Crunches strengthen and build the abs, but whether they are visible depends mostly on body fat, which comes down to diet and overall activity.