Ab Twists: 5 Twisting Exercises That Train Your Obliques

An ab twist is a core exercise where you turn your ribcage from side to side while your hips stay still. It mainly trains your obliques, the muscles along the sides of your waist that rotate your trunk. The classic version is the seated Russian twist, and the steps below show how to do it with good form.

How to Do an Ab Twist

1. Sit on the floor with your knees bent and your feet flat, or hovering just off the ground.
2. Lean your torso back to about 45 degrees. Keep your spine long and your chest lifted — do not round your lower back.
3. Clasp your hands together in front of your chest, or hold a light weight.
4. Rotate your torso to one side, leading with your ribcage rather than your arms. Stop when your hands reach the floor beside your hip.
5. Rotate back through the center and to the other side. That is one rep. Exhale on each rotation.

Start with 2 sets of 10 reps per side. Add weight only once you can complete all reps without your lower back rounding or your feet dropping.

Easier version: keep your heels on the floor, lean back less, and turn only as far as you can while your lower back stays long.

Three mistakes that make ab twists hurt your back

• Swinging your arms instead of rotating your spine. If your hands move but your ribcage does not, your obliques are not doing the work. Slow down until you feel the rotation start at your ribs.
• Rounding your lower back as you lean. When your lower back rounds, the movement comes from your spine instead of your ribcage. Sit taller, lean back less, and keep your feet down until you are stronger.
• Going too fast. Fast, swinging reps let momentum do the work and make it harder to keep your lower back still. A controlled two seconds per side beats a fast twenty reps.

What Are Twisting Exercises for Abs?

Twisting exercises for abs are core moves that turn your torso around your spine. Trainers call this the transverse plane. They differ from crunches and leg raises, which bend your trunk forward and back.

Your core moves in three planes of motion:

• Sagittal plane — forward and backward movement (crunches, sit-ups, leg raises)
• Frontal plane — side-to-side movement (side bends)
• Transverse plane — rotational movement (twists, wood chops, cable rotations)

The National Academy of Sports Medicine (NASM) lists Russian twists, woodchops, cable rotations and standing torso rotations among its transverse-plane exercises.

The main muscles behind a twist are your two obliques. According to Kenhub's anatomy reference, the external oblique is the largest and most superficial of the side abdominal muscles, and it works with the internal oblique on the opposite side to rotate your trunk. So when you twist to the right, your left external oblique and right internal oblique do most of the turning. Your rectus abdominis and deeper muscles such as the transverse abdominis help hold your trunk steady while you turn.

Rotation vs. Anti-Rotation: Two Ways to Train Your Obliques

Your obliques have two jobs. They turn your torso (rotation), and they stop it from turning when something pulls you sideways (anti-rotation), like carrying a heavy bag in one hand. Twisting exercises train the first job. Exercises such as the Pallof press, where you hold a resistance band still while it tries to pull you around, train the second.

Four of the five exercises below are rotation drills. The dead bug is the exception: it is a control drill that teaches you to keep your trunk still while your arms and legs move. That same skill keeps your twists coming from your ribcage instead of your lower back.

Why Add Rotation to Your Ab Workout?

Many home ab routines are built from crunches, sit-ups and planks, which train your trunk to bend forward or to hold still. Adding rotation covers a movement you use every day: turning to reach the back seat, swinging a racket, or lifting something from one side.

What rotation training can't promise is a fix for back pain. Research on core training for chronic low back pain is encouraging, but it has mostly tested stabilization, Pilates and core strength programs rather than twisting exercises. A 2015 review in the Journal of Physical Therapy Science found core strength training more effective than typical resistance training for easing chronic low back pain, and recommended focusing on the deep trunk muscles. A 2025 meta-analysis of 57 trials in Frontiers in Physiology reached a similar conclusion for core training overall. Neither tested ab twists specifically, so if your back hurts, treat twists as one part of a broader plan rather than the treatment itself.

The 5 Best Twisting Exercises for Abs

These five exercises train your obliques from different positions: seated, lying down and standing. Each one includes a starting set and rep range, a form cue and a way to make it harder once it gets easy.

1. Russian Twist

The Russian twist is a seated rotation where you lean back slightly and turn your torso side to side. Your obliques do the turning, while your rectus abdominis and hip flexors hold the lean-back position.

• Sets/reps: 3 × 20 (10 per side)
• Form cue: Keep your chest tall — don't let your lower back round. Start the twist from your ribcage, not your arms.
• Progression: Lift your feet off the floor, then hold a light medicine ball or dumbbell

2. Bicycle Crunch

The bicycle crunch combines a crunch with rotation: you bring one elbow toward the opposite knee while the other leg straightens. In a 2001 study commissioned by the American Council on Exercise (ACE), researchers at San Diego State University used EMG to measure muscle activity in 30 adults. The bicycle crunch produced about 290% of the oblique activity of a standard crunch, second only to the captain's chair at 310%. Higher muscle activity during a set doesn't by itself mean faster visible results, but it shows the move works your obliques hard.

• Sets/reps: 3 × 24 (12 per side)
• Form cue: Slow down. Most people rush bicycle crunches and lose the rotation. Take 2 seconds per rep.
• Easier version: Keep the straightened leg higher off the floor, which is easier on your lower back
• Progression: Pause for 1 second at full rotation before switching sides

3. Standing Wood Chop

The standing wood chop uses a cable machine or resistance band to pull diagonally, from high to low or low to high. Because you do it standing, your hips and legs share the work, which is closer to how you turn in daily life.

• Sets/reps: 3 × 12 per side
• Form cue: Drive the movement with your hips and core, not your arms. Let your back foot pivot slightly as you rotate.
• Easier version: Use a light band and a shorter range
• Progression: Increase the resistance, slow the return, or pause at the end of the chop

4. Seated Oblique Rotation

The seated oblique rotation takes your lower body out of the movement so only your torso turns. Sit tall on a chair, a bench or the floor. On the floor, bend one knee and hug it lightly to help keep your hips facing forward, as shown below. It's a good option for beginners, or if floor exercises that lean you back bother your hips or lower back.

• Sets/reps: 3 × 20 (10 per side)
• Form cue: Keep your hips and lower body still. The rotation should happen only from the waist up.
• Progression: Hold a light weight at your chest, or turn against a resistance band anchored at chest height

5. Dead Bug (with a Cross-Body Reach)

The dead bug is the control drill in this list. Lie on your back with your arms pointing at the ceiling and your knees bent over your hips. Slowly lower one arm and the opposite leg toward the floor while pressing your lower back down, then switch sides. Once that's easy, add a cross-body reach: as one leg extends, reach the opposite hand toward the bent knee, so your obliques have to control a small turn.

• Sets/reps: 3 × 10 per side
• Form cue: Press your lower back into the floor throughout. Never let it arch away from the surface.
• Easier version: Move your arms only, or your legs only
• Progression: Add a 3-second pause at full extension, or hold a light dumbbell in the reaching hand

A 15-Minute Twisting Ab Routine

This routine puts the five exercises together. Do it 3 times a week with at least one rest day between sessions. With 2 sets of each exercise it takes about 15 minutes; once you move to 3 sets, plan on about 20 minutes.

Weeks 1–2: Do 2 sets of each exercise at bodyweight or light resistance. Focus on the quality of each rotation, not speed.

Weeks 3–4: Move to 3 sets. Add a light dumbbell or plate to the Russian twist, increase bicycle crunches to 15 per side, and add a 1-second pause to the dead bug.

If you'd like a full month of ab training laid out day by day, our 30-day ab workout calendar shows how to build up week by week.

Can You Do Ab Twists on an Ab Machine?

You don't need equipment for any of the exercises above. If you'd rather train rotation seated, the Wonder Core 2 ($169.99) has a twisting seat that its product page says "enhances oblique and cardio workouts," plus dual springs that help you return to the start position and pulley resistance bands for rowing-style moves. The springs assist rather than resist, so they make crunch-style moves easier, not harder. New owners can start with our first-month Wonder Core 2 routine.

Ab Twists: Frequently Asked Questions

Do ab twists really work?

Yes — for building rotational strength and oblique endurance. No — for burning fat off your waist. Spot reduction is not physiologically possible, so visible obliques come from overall body composition, not from twisting more. What ab twists reliably do is train rotation, which crunches and planks don't train directly.

That matters more than it sounds. Rotation is how you swing a golf club, lift a child out of a car seat, and reach for something behind you. A core trained only with crunches and planks never practices turning.

What is an ab twist?

An ab twist is any core exercise where your torso rotates while your hips stay relatively still. The classic version is the Russian twist — seated, leaning back, rotating side to side — but seated rotations, bicycle crunches and standing wood chops belong to the same family.

The defining feature is not the equipment or the position. It is that the movement happens across your body rather than up and down, which is what recruits the internal and external obliques.

Do Russian twists work your obliques or your lower abs?

Mostly your obliques, because they're the muscles that turn your trunk. Holding the lean-back position also makes your rectus abdominis and hip flexors work to keep you from tipping back. "Lower abs" aren't a separate muscle — they're the lower part of the rectus abdominis — so no twist can isolate them, and none can burn fat from your lower belly.

What are the big 3 ab exercises?

The best-known "big 3" is the McGill Big 3: the curl-up, the side plank and the bird dog. Spine researcher Stuart McGill developed them to train the muscles that keep your spine stable, as Harvard Health explains. None of them is a twist; they teach your core to hold steady. Many people pair them with one rotation move, such as a wood chop or an ab twist.

What is the no. 1 exercise for abs?

There is not one, and any list that names a single winner is oversimplifying. Your abs are several muscles working in three planes of motion — no single exercise trains all of them. If you are forced to pick one, the plank is a useful all-rounder because it trains your core to resist your lower back sagging.

But a plank alone leaves rotation untrained. That is the gap ab twists fill.

Are twisting exercises safe for my lower back?

For most healthy adults, slow, controlled twists with a comfortable range are fine. Stop before your lower back rounds, and skip added weight until your form is solid. If you have a disc problem, a recent back injury, or back pain that flares when you twist, check with a doctor or physical therapist first. Research on core training for back pain has mostly tested stabilization programs, not twisting.

Do twisting exercises reduce belly fat or love handles?

No. Spot reduction does not work — you cannot choose where your body burns fat. Twisting exercises strengthen the oblique muscles underneath, but whether that shows depends on your overall body fat, which is driven by diet and total activity. The honest version: twisting will change how your waist functions long before it changes how it looks.

How often should I do twisting exercises for abs?

Two to three times a week works for most people. Beginners can start with 2 sessions; if you add weight, leave a rest day between those harder sessions.

What's the difference between a Russian twist and a seated oblique rotation?

In a Russian twist you hold yourself in a lean-back position, so your hip flexors and abs work to keep you from tipping back while you turn. In a seated oblique rotation you sit upright, so the work is just the turn itself. Seated rotations are easier to learn and often more comfortable if the lean-back position bothers your hips or lower back.

Can I do twisting exercises every day?

Light bodyweight drills such as dead bugs or gentle seated rotations are fine most days. For weighted twists, treat them like other strength training and leave a day between sessions.

Keep Reading

• Best Ab Machines for Obliques & Lower Abs 2026 — how different ab machines handle oblique and lower-ab training.
• Are Sit-Ups Bad for Your Back? 5 Safer Core Workouts — if ab twists still bother your lower back, start here instead.
• Slim Waist Workout at Home: A Practical Routine for Busy Women — how rotational work fits into a complete waist-focused routine.