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Exercises

Ab exercises at the gym: machines, cables and stations

Published October 19, 2026

The best ab exercises at the gym use what home lacks: the cable crunch and ab crunch machine to load the six-pack with real weight, the captain's chair and hanging leg raise for the lower abs, the Pallof press, cable woodchop and landmine twist for the obliques, and the barbell rollout for bracing. Because these can be loaded and progressed like any lift, train abs in the 8 to 15 rep range, 2 to 4 sets per move and 6 to 10 hard sets per session, ending 1 to 2 reps short of failure, two or three times a week.

  1. Cable Crunch Abs
  2. Machine Crunch Abs
  3. Captain's Chair Knee Raise Abs
  4. Hanging Leg Raise Abs
  5. Pallof Press Abs
  6. Cable Woodchop Abs
  7. Landmine Twist Abs
  8. Barbell Rollout Abs

Ab machines and loaded crunches

Three stations load the six-pack with weight you can add a plate at a time: the cable stack, the seated ab crunch machine and the decline bench. A plate held to the chest does the same on any open patch of floor. Load is the main thing a gym gives your abs that a living room cannot.

Six-pack, the loaded crunch

Cable Crunch

Abs

Standing with your back to a high pulley and the rope behind your head, you curl your trunk down against the stack, and the load can go up for months. It is the gym move that most directly builds the six-pack muscle.

How to do it

  1. Attach a rope to a high pulley, turn your back to the stack and hold the ends behind your head.
  2. Step forward so the weight lifts, then brace your hips in place and curl your ribs down toward your pelvis.
  3. Pause when your trunk is fully curled, then let the rope pull you back up slowly.

Cues

  • Ribs to pelvis
  • Hips still
  • Round, don't hinge

Common mistakes

  • Hinging at the hips so the body weight pulls the stack down.
  • Pulling the rope with the arms instead of keeping the hands at the head.

Swap for: Machine Crunch, Decline Crunch

Build a session with Cable Crunch

Six-pack, easiest to learn

Machine Crunch

Abs

The seated ab crunch machine guides the path and lets you pick the load with a pin, which makes it the safest way to start loading your abs. It suits beginners and anyone who finds the cable crunch awkward.

How to do it

  1. Set the seat so the pads or handles sit at your chest or shoulders, and pick a light weight.
  2. Curl your chest down toward your thighs using your abs.
  3. Pause at the bottom and return slowly until the weight nearly touches the stack.

Cues

  • Curl the chest
  • Slow return
  • Don't yank

Common mistakes

  • Pulling the handles down with the arms.
  • Letting the stack crash between reps.

Swap for: Cable Crunch, Crunch

Build a session with Machine Crunch

Six-pack, bench version

Decline Crunch

Abs

Lying head-down on a decline bench adds range and load to a sit-up. Hold a plate on your chest when bodyweight reps pass 20.

How to do it

  1. Hook your feet under the pads of a decline bench and lie back.
  2. Curl up, chin tucked, until your trunk is upright.
  3. Lower slowly, one segment of the back at a time.

Cues

  • Curl up
  • Slow down
  • Plate at chest when easy

Common mistakes

  • Throwing the arms forward to sit up.
  • Dropping back fast and bouncing off the bench.

Swap for: Plate Sit-Up, Cable Crunch

Build a session with Decline Crunch

Six-pack, with a plate

Plate Sit-Up

Abs

Holding a plate at your chest or overhead turns the sit-up into a loaded move without a machine. It works anywhere in the gym when the stations are taken.

How to do it

  1. Sit with knees bent and feet anchored under a bench or held by a partner, plate held to your chest.
  2. Lie back under control.
  3. Curl up and sit tall again, keeping the plate close.

Cues

  • Curl up
  • Plate close
  • Slow descent

Common mistakes

  • Throwing the plate forward to sit up.
  • Dropping back on the way down.

Swap for: Decline Crunch, Machine Crunch

Build a session with Plate Sit-Up

Lower ab exercises at the gym

The captain's chair supports your back and arms so you can focus on lifting the knees. A pull-up bar adds hanging raises, and a cable ankle strap turns hip flexion into a loaded move you can progress by the plate.

Lower abs, supported

Captain's Chair Knee Raise

Abs

The back pad and forearm rests take your grip and swing out of it, so every rep is your abs lifting your legs. It is the best first lower-ab station in the gym.

How to do it

  1. Stand on the step, press your back to the pad and set your forearms on the pads.
  2. Lift your knees toward your chest and curl your pelvis up off the pad at the top.
  3. Lower your legs slowly until they hang straight.

Cues

  • Pelvis curls
  • Slow lower
  • Back on the pad

Common mistakes

  • Stopping at hip height, which leaves the abs half used.
  • Swinging the legs up and dropping them.

Swap for: Hanging Knee Raise, Reverse Crunch

Build a session with Captain's Chair Knee Raise

Lower abs, hardest

Hanging Leg Raise

Abs

Hanging from a bar with straight legs is a hard ab move that uses your full leg weight. Use it when 15 captain's chair raises are easy.

How to do it

  1. Grab the bar and hang, arms and legs straight.
  2. Raise your legs straight in front of you to hip height or higher.
  3. Curl the pelvis at the top, then lower the legs without swinging.

Cues

  • Straight legs
  • No swing
  • Tilt the pelvis

Common mistakes

  • Kipping the hips to get the legs up.
  • Letting the legs drop and bounce at the bottom.

Swap for: Captain's Chair Knee Raise, Hanging Knee Raise

Build a session with Hanging Leg Raise

Lower abs and hip flexors, loaded

Standing Cable Hip Flexion

Abs

An ankle strap on a low pulley lets you load the knee-raising motion with plates, one leg at a time, standing upright. It also builds the hip flexors used in sprinting.

How to do it

  1. Attach an ankle strap to a low pulley, strap one ankle and face away from the stack.
  2. Hold the frame for balance and stand tall on the other leg.
  3. Drive the strapped knee up toward hip height or above, then lower it slowly.

Cues

  • Tall chest
  • Knee high
  • Control the return

Common mistakes

  • Leaning back to lift the knee higher.
  • Letting the stack yank the leg back.

Swap for: Hanging Knee Raise, Captain's Chair Knee Raise

Build a session with Standing Cable Hip Flexion

Cable and landmine moves for the obliques

A cable pulls from the side at a constant tension, which makes it the best tool for training your trunk to turn or to resist turning. The landmine adds a heavy rotation option.

Obliques, anti-rotation

Pallof Press

Abs

Pressing a cable handle straight out while the cable pulls you sideways trains the obliques to stop rotation. It is one of the best core moves for lower-back comfort.

How to do it

  1. Set a cable at chest height, stand side-on to it and grip the handle two-handed at your chest.
  2. Step away until the cable pulls, feet hip-width.
  3. Press the handle straight out, hold for two seconds without turning, then bring it back.

Cues

  • Hands on the midline
  • Don't turn
  • Hold it out

Common mistakes

  • Standing too close, so the cable barely pulls.
  • Letting the arms drift toward the stack.

Swap for: Cable Woodchop, Landmine Twist

Build a session with Pallof Press

Obliques, rotation

Cable Woodchop

Abs

A cable chop trains your trunk to turn against a smooth, constant load, which dumbbells cannot match. Set the pulley high for a downward chop or low for a lift.

How to do it

  1. Set a cable high, stand side-on and grip the handle two-handed above the near shoulder.
  2. Chop it on a diagonal to the far hip, turning your chest as your back heel lifts and spins.
  3. Let it return along the same line under control. Finish one side, then switch.

Cues

  • Turn the chest
  • Arms long
  • Pivot the back foot

Common mistakes

  • Pulling with the arms rather than turning the trunk.
  • Going so heavy the stack drags you back on the return.

Swap for: Dumbbell Woodchop, Pallof Press

Build a session with Cable Woodchop

Obliques, heavy rotation

Landmine Twist

Abs

Swinging the end of a landmine bar from hip to hip loads rotation more heavily than a cable. Start with the empty bar.

How to do it

  1. Hold the end of a landmine bar at chest height with both hands and arms nearly straight.
  2. Turn your trunk and arms to lower the bar toward one hip in an arc.
  3. Bring it back over the middle and down to the other hip.

Cues

  • Arc, don't drop
  • Pivot the feet
  • Brace

Common mistakes

  • Letting the bar fall to the hip and bouncing it back.
  • Adding plates before the arc is smooth.

Swap for: Cable Woodchop, Russian Twist

Build a session with Landmine Twist

Rollouts and carries

A loaded barbell rolls like an ab wheel, and the dumbbell rack lets you carry far more weight than most homes have. Both train the abs to hold your trunk still under load.

Bracing, the loaded rollout

Barbell Rollout

Abs

A barbell with round plates rolls like an ab wheel and is in every gym. It stretches the abs under heavy load while they stop your back from arching.

How to do it

  1. Load a barbell with round plates, kneel and hold it under your shoulders.
  2. Roll it forward with straight arms until just before your lower back starts to dip.
  3. Pull it back toward your knees with your abs.

Cues

  • Tuck the pelvis
  • Arms straight
  • Only as far as you control

Common mistakes

  • Letting the hips sag at the far end.
  • Pushing the hips back first on the way in.

Swap for: Ab Wheel Rollout, Stability Ball Body Saw

Build a session with Barbell Rollout

Obliques, the heavy carry

Dumbbell Suitcase Carry

Abs, Quads

A heavy dumbbell from the gym rack in one hand makes the other side of your trunk keep you upright. It is a great ab finisher at the end of a training session.

How to do it

  1. Take a heavy dumbbell from the rack in one hand.
  2. Walk tall and steady across the floor without leaning.
  3. Switch hands and walk back.

Cues

  • Stay level
  • Slow steps
  • Tight grip

Common mistakes

  • Leaning away from the dumbbell.
  • Choosing a weight light enough to swing.

Swap for: Farmer's Walk, Plate Overhead Carry

Build a session with Dumbbell Suitcase Carry

Put them together: example sessions

Each session below picks from the exercises above for one situation, with the sets, reps, rest and RIR filled in. Open one in the session builder to change a pick, price it from a recent set, and add it to RIRLift.

Session 1

One cable station, busy gym, 15 minutes

Open in the session builder
  • Workouts2× a week
  • Working sets18 a week
  • Per workout~20 min
  • EquipmentAdjustable Cable

Your gym is crowded and you can claim one cable tower for a quarter hour after your workout.

One cable stack covers all three things the abs do: the crunch with the rope up high, the woodchop from the same pulley, and the hip flexion with an ankle strap at the bottom. You never have to give up the station. Each move is loaded like a lift in the 8 to 15 range at 1 RIR, and 9 sets twice a week is plenty on top of lifting.

Cable Abs
ExerciseSets × repsRIRRest
Cable CrunchPause at the bottom. 3 × 10–15 1 1 min
Cable WoodchopPer side. 3 × 8–12 1 45 s
Standing Cable Hip FlexionPer leg. 3 × 10–15 1 45 s
How to run it
Do it after two of your regular workouts. Set the pulley high for the crunch and chop, then lower it for the hip flexion.
How to progress
Add reps until all sets reach 15, then move the pin one plate down.
Open in the session builder

Session 2

A dedicated ab day, full gym

Open in the session builder
  • Workouts1× a week
  • Working sets14 a week
  • Per workout~30 min
  • EquipmentPull-Up Bar, Ab Crunch Machine, Landmine, Barbells +1

You want a separate weekly ab session and have time to move between stations.

A full ab day uses the strongest version of each move: the hanging leg raise for the lower abs, the ab crunch machine for heavy curling, the landmine twist for rotation and the barbell rollout and heavy suitcase carry for bracing. With a whole session to spend, it gets 14 sets, more than any finisher. Most sets end at 1 RIR; the rollout stays at 2 so the back never sags.

Ab Day
ExerciseSets × repsRIRRest
Hanging Leg Raise 3 × 6–12 1 90 s
Machine Crunch1 warm-up set first 3 × 8–12 1 75 s
Landmine TwistPer side. 3 × 8–12 1 1 min
Barbell Rollout 3 × 6–10 2 90 s
Dumbbell Suitcase CarrySteps per hand. 2 × 20–30 1 1 min
How to run it
Do it once a week on a day without heavy squats or deadlifts. Add a short finisher from the cable plan on a second day if you want more.
How to progress
Each week, add a rep or a plate to the crunch and twist and a few seconds' control to the rollout. Swap the leg raise for strict knee raises if your form breaks.
Open in the session builder

Session 3

New to the gym, machines first

Open in the session builder
  • Workouts2× a week
  • Working sets16 a week
  • Per workout~15 min
  • EquipmentAb Crunch Machine, Dip Bar, Adjustable Cable, Decline Bench

You have just joined a gym and want ab exercises you can set up without help.

Machines and the captain's chair are the easiest stations to learn: the ab crunch machine sets the path, the captain's chair supports your back, and the Pallof press only asks you to hold still. A decline crunch gives you one free move to learn. Two sets of each at 2 RIR keeps soreness low while you learn the stations.

Beginner Abs
ExerciseSets × repsRIRRest
Machine Crunch 2 × 10–15 2 1 min
Captain's Chair Knee Raise 2 × 8–15 2 1 min
Pallof PressPer side, 2 s hold. 2 × 8–12 2 45 s
Decline Crunch 2 × 10–15 2 1 min
How to run it
Do it twice a week after your main workout. Start each move with the lightest weight and work up in the first set.
How to progress
When a move hits the top of its range at 2 RIR, add weight or switch to its next step: captain's chair to hanging raises, Pallof press to the cable woodchop.
Open in the session builder

Make it fit you

Questions

Which machines at the gym are for abs?

The seated ab crunch machine, the cable stack with a rope, the decline bench and the captain's chair. A pull-up bar and a landmine also give you strong ab moves even though they are not ab machines.

What is a good ab workout to do at the gym?

A cable crunch, a captain's chair knee raise and a Pallof press, 3 sets each at 1 to 2 reps short of failure. That covers curling, the lower abs and anti-rotation in about 15 minutes.

What are good exercises for the lower abs at the gym?

The captain's chair knee raise, the hanging leg raise and the standing cable hip flexion. All of them pull the legs and pelvis up toward the ribs, which works the lower part of the abs harder.

Should I do an ab day at the gym?

Either works. A weekly ab day with 10 to 15 sets or a short block after two other workouts gives about the same weekly volume. Pick the one you will actually do.

Can I get a six-pack in 2 weeks?

Only if you are already lean. Two weeks of gym ab work makes your abs stronger, but most people need months of fat loss to see the outline.

How heavy should I go on ab machines?

Pick a weight you can curl for 8 to 15 controlled reps with 1 to 2 left in reserve. If you can do 25, it is too light to build much muscle.