Cable Russian Twists
Lying face-up across a stability ball with arms extended toward a mid-height pulley, you rotate the torso a quarter turn away from the machine and back. The hips stay high the whole time, so the obliques rotate while the glutes hold a bridge — two demands the floor version of a Russian twist never makes.
Own the movement
Set up first, then execute. Every cue below is something you can check on your next set.
Before the first rep
- Single handle on a pulley set roughly at the height of your chest when you are lying on the ball.
- Lie back across the ball perpendicular to the cable, upper back and shoulders supported, head resting.
- Walk your feet until you are about an arm's length from the tower with the stack already lifted.
- Press your hips up so your body is flat from shoulders to knees, and hold that line before the first rep.
- Both hands on the handle, arms locked out straight above your chest, hands in line with the pulley.
Every rep
Breathing & tempo — Exhale as you rotate away, inhale on the return, and never fully release the brace between reps. One second out, one second held, two to three seconds back.
Before you load it
- Only your upper back is on the ball. Check the floor is clear on both sides before you start — rolling off mid-set with a loaded cable in your hands is the failure mode here.
Sets, reps & load
Where to start, and what to change when it stops being hard.
Start at 5 kg on the stack and expect to stay there for weeks. The arm's-length lever multiplies whatever is on the pin. Good looks like a full quarter rotation with the hips level and a one-second pause at end range. Add weight only after that pause holds on the last rep; before then, add rotation range or slow the return.
What goes wrong
The errors that show up most often, and the cue that fixes each one.
Squeeze the glutes hard before the first rep and hold that squeeze for the whole set. If they still sag, cut the reps to six and rebuild from there — the bridge is the limiting factor, not the rotation.
Lock the elbows out and think of your arms as a fixed pole bolted to your chest. If the handle drifts sideways while your chest stays put, you have lost the exercise.
Stop at a quarter turn and no more. Set the ball so your shoulder blades stay on it at end range, and film one set from overhead if you are not sure where that point is.
Pick a weight you can rotate away from and hold for one full second. Long lever plus rotation means honest loads here are single-digit kilos.
Why bother
Arms extended over the chest turns the cable into a long lever. A 10 kg stack held at arm's length asks far more of the obliques than 10 kg held at the sternum, which is why the weight you use here looks trivially small next to what you would twist with a plate on the floor.
The ball adds the second job. Because only your upper back is supported, the glutes and hamstrings have to hold the bridge while the torso rotates on top of it. If the hips drop as you turn, you have found the real limiting factor, and it is not your abs.
Where it fits
Accessory slot at the end of an upper-body or core session, two or three times a week. It needs a free cable station, a ball and floor space, so it suits a quiet gym; in a busy one, a standing chop gets the same job done faster.
If this one isn't it
No kit, too hard, or too easy — here's where to go instead.
Same job, different kit
Asked and answered
Can I do this on a bench instead of a ball?
You can, and it is more stable, but you lose most of what makes the exercise distinct. On a bench your torso is pinned and the rotation gets shorter; on the ball your shoulders can rotate freely while the hips hold position. Use the bench if the ball is genuinely unmanageable, otherwise use the ball.
How far should I rotate?
A quarter turn from the start position — chest ending roughly perpendicular to where it began. Chasing more range means either rolling off the ball or twisting the lumbar spine, which rotates about five degrees per segment and is not built to be the source of the movement.
Why does this feel so much lighter on one side?
Almost everyone rotates better one way, usually toward the side they throw or swing with. Start each set on the weaker side, note the reps you get, and cap the strong side at the same number. Chasing symmetry with extra sets for the weak side works slower than simply refusing to overtrain the strong one.
Is this safe for my lower back?
Loaded rotation gets a worse reputation than it deserves, but the caution is real if the turn comes from your lumbar spine. Rotation should happen at the hips and thoracic spine while the lower back stays braced. Keep the load light, the pace slow, and stop the set when the hips sag — that sag is when the lumbar starts absorbing the twist.