Floor Wipers

What the floor wiper actually trains

A floor wiper is a supine rotational trunk exercise in which you hold a barbell at arms' length above your chest, raise your straight legs, and sweep them from one hand to the other without letting the bar or your shoulders move.

The external and internal oblique produce and control the rotation of the pelvis. The rectus abdominis holds the trunk flexed and keeps the lower back pressed towards the floor. Quadratus lumborum and the erector spinae resist the sideways pull as the legs travel. The hip flexors, meaning psoas major, iliacus and rectus femoris, hold the legs up for the entire set, which is a substantial isometric job in its own right.

The bar is not resistance. This is the point people miss. The barbell is an anchor, something for your hands to hold so your upper body stays fixed and gives the legs a target. Loading it heavily does not make the exercise harder in any useful way; it mostly makes the overhead position more precarious while you are busy attending to your legs.

Which leaves you with a bodyweight rotational movement whose difficulty is set by the length of your legs and nothing else. That is the central problem with floor wipers. There is no clean way to progress them. You can bend the knees to make it easier or straighten them to make it harder, and beyond that you are adding repetitions to a movement that is already limited by trunk control rather than muscular endurance.

Compare that with a cable chop, where you can add five kilos, or a hanging leg raise, where you can hold a dumbbell between your feet. Both give you a decade of progression. The floor wiper gives you about two steps.

It is not a bad exercise. It loads rotation honestly and demands real control. But it is a demonstration more than a training tool, and it belongs low on the list.

Setting up and executing

Lie on your back with a barbell pressed to arms' length above your chest. An empty or lightly loaded bar is correct.

Set the hands wider than shoulder width, so they give your feet a clear target on each side.

Brace the abs and press the lower back towards the floor. Hold that pressure throughout; it is the difference between an abdominal exercise and a lumbar one.

Raise both legs straight up towards the bar, legs together, knees close to locked.

Lower the legs in an arc towards one hand, stopping before the feet reach the floor. Then sweep them back up and across towards the other hand.

The shoulders and the bar stay completely still. If the bar wanders, the set is over.

Alternate until the set is finished, then lower the legs under control rather than dropping them.

The mistakes that cost you the most

Letting the lower back arch is the fault that matters. As the legs swing wide, the hip flexors pull hard on the front of the pelvis, and if the abdominal wall cannot resist that, the lumbar spine lifts off the floor and takes the strain. The fix is not to blame the hip flexors, which are doing exactly what they are built for, but to reduce the range until your abs can hold the position.

Swinging for momentum is the second problem. Fast sweeps let the legs travel further than your trunk can control, which makes the movement look impressive and train very little.

Too much weight on the bar is a misunderstanding of the exercise. The bar anchors you. Adding plates makes the overhead position less stable without adding meaningful demand to the trunk.

Bending the knees quietly halves the difficulty. That is a legitimate regression if you choose it deliberately, and a problem if it creeps in as you fatigue.

And doing this at all when you cannot control a slow lying leg raise is putting the cart in front of the horse. Build the basic position first.

Sets, reps and rest by goal

Low reps, high control, generous rest.

For muscle gain, three sets of eight to twelve total sweeps with ninety seconds. For strength, three sets of six to ten with two minutes. In a fat loss phase, three sets of ten to sixteen with a minute.

Count a sweep to each side as one rep, and stop the set the moment your lower back starts lifting off the floor. That is the real end of the set, not the point where your abdominal muscles fail.

Progression is genuinely limited, as discussed. Straightening the knees, widening the arc and slowing the tempo are the levers available. Once you have used them, the honest move is to spend the training time on something that loads more easily.

Schoenfeld and colleagues found a dose response between weekly hard sets and hypertrophy, and the practical implication here is unhelpful for this exercise: floor wipers are a poor way to accumulate volume, because control fails long before the muscle does.

Refalo and colleagues found stopping short of failure produces comparable growth to training to failure, which removes any argument for grinding out ragged final repetitions.

Where it fits in your split

At the end of a session, on a day when nothing else needs your trunk.

On push, pull and legs it fits at the end of pull day. On a bro split it is the rotational movement on ab day. On an upper and lower split the full body session is the natural home. On a full body programme it is only worth the slot if you already have the strength for it.

Never before heavy compound lifting. Cholewicki and colleagues showed the size of the loads the lumbar spine carries during heavy lifting, and the trunk musculature is what manages them. Turning up to a heavy squat with fatigued obliques is a bad trade.

Frequency should stay low, once a week at most, not because the movement is dangerous but because it is not efficient enough to justify more.

If your programme already contains a chop, a Pallof press or a hanging windshield wiper, the floor wiper adds nothing you do not already have.

Variations worth knowing

The lying windshield wiper drops the barbell entirely and spreads the arms on the floor, which is simpler, safer and almost identical in what it trains.

The hanging windshield wiper moves the whole thing to a pull-up bar, adding grip and shoulder demand and a longer range, and is the harder and more impressive version.

The bent knee floor wiper shortens the lever and is the sensible entry point for anyone whose lower back lifts during the full version.

The lying leg raise removes the rotation and trains straight trunk flexion against the weight of the legs, and is a better first exercise for almost everyone.

The dead bug is slow, unloaded and unglamorous, and builds precisely the anti-extension control that floor wipers demand.

And the cable half-kneeling chop trains rotation with load you can add in small increments, which is the thing floor wipers cannot offer.

What the evidence says

McGill's review of core training argues for training the trunk to resist unwanted motion, and the floor wiper is largely an exercise in resisting the pelvis being dragged into extension and rotation by the weight of the legs.

Cholewicki and colleagues quantified lumbar spine loads during extremely heavy lifting, which is the reason to keep demanding trunk work away from your heavy compound sessions.

Escamilla and colleagues compared a wide range of commercial and common abdominal exercises and found substantial differences in muscle involvement, supporting the idea that novelty does not equal effectiveness.

A further study from Escamilla and colleagues compared Swiss ball and traditional abdominal exercises and found the harder looking option did not reliably produce more abdominal involvement, which is a useful caution here.

Vigotsky and colleagues warned that surface electromyography amplitudes should not be treated as direct measures of growth potential, so an activation figure for a spectacular exercise proves less than it appears to.

Schoenfeld and colleagues found a dose response between weekly hard sets and hypertrophy, which is exactly why an exercise that cannot be loaded is a weak vehicle for building muscle.

Refalo and colleagues found stopping a rep or two short of failure produces comparable hypertrophy to training to failure, so ending the set when control goes costs you nothing.

Common questions

How much weight should be on the bar?

Very little, and often none. The bar is an anchor for your hands, not the resistance. Adding plates makes the overhead position less stable while doing almost nothing for your trunk, which is the opposite of a good trade.

Why does my lower back hurt during these?

Almost always because the lumbar spine is lifting off the floor as the legs swing out. Press the lower back down before the legs move and reduce the arc until you can hold it. If that means small sweeps, do small sweeps.

Is this better than a hanging windshield wiper?

No. The hanging version has a longer range, more available progression and a grip demand you would otherwise have to train separately. The floor version is the accessible one, which is a different virtue.

Are floor wipers worth doing at all?

They are fine, and they are not necessary. They train rotation honestly and they demand real control. What they cannot do is progress, which means they suit an occasional appearance rather than a permanent slot in your programme.

Will these give me a smaller waist?

No. Spot reduction does not work, and no rotational exercise burns fat from the area it works. Nor will oblique training visibly widen your waist. Waist size is a body composition question, not a training one.