Windshield Wipers

What windshield wipers actually train

Windshield wipers are a rotational abdominal exercise in which you raise your legs, either hanging from a bar or lying on your back, and rotate them side to side like a pair of wipers.

The external oblique on one side and the internal oblique on the other produce and then control the rotation, working as a pair across the trunk. The rectus abdominis holds the legs up throughout, which is a continuous isometric demand on top of the rotational one. The quadratus lumborum and the erector spinae stabilise, and in the hanging version the lats and the grip are working the whole time as well.

The thing that makes wipers hard is the lever. Your legs are long and heavy, and holding them out at arm's length from the pivot while turning them is a much larger demand than any standing rotation. That is also what makes them dangerous to attempt too early. The failure mode is not a gentle stall; it is your legs falling to one side and your trunk catching them at the bottom of the arc with no control.

Which leads to the honest assessment. Wipers are a good exercise for people who have already built a strict hanging leg raise and a controlled loaded rotation. For everybody else, they are an impressive looking way to swing, and a standing cable rotation trains the same muscles with a load you can pick to the kilogram.

The rotation itself is not the problem. Loaded rotation is a normal, safe thing to train. The problem is the combination of a very long lever, a load you cannot adjust, and gravity providing most of the force.

Setting up and executing

Hang from a bar with an overhand grip a little wider than your shoulders, or lie on your back holding something fixed behind your head.

Pull the shoulder blades down and stop any swinging before you begin. A hanging wiper started from a swing is finished before it starts.

Raise the legs until they point towards the ceiling, keeping them together with the knees locked or slightly bent depending on your progression.

Brace the abdominal wall and keep the ribs down.

Rotate the legs slowly to one side, stopping before the shoulder on that side starts to lift off the bar or the floor. Pause briefly.

Reverse the rotation smoothly through the middle to the other side. That is one repetition per side.

Finish the set by lowering the legs under control rather than dropping them.

The mistakes that cost you the most

Dropping the legs to one side is the fault that causes injuries. If gravity takes the legs and your trunk catches them at the bottom of the arc, you have handed a large eccentric load to muscles that were not ready for it, at speed. Move slowly enough that you could stop at any point in the arc.

Rotating before the legs are vertical makes the lever much longer and the exercise far harder than intended. Get the legs up first, then turn them.

Straight legs too early is the usual impatience. Bending the knees shortens the lever dramatically and is the correct starting point for almost everybody. Pallares and colleagues found full range training generally beats partial range work, but that applies to a range you can control; here, reducing the lever is how you earn the range.

Shoulders rolling off the bar or the floor tells you the rotation has gone past what you can hold. Shorten the arc rather than letting the whole torso roll.

And attempting them before you own a strict hanging leg raise is the ordering error that produces most of the bad repetitions you see. Build the raise, then add rotation.

Sets, reps and rest by goal

Low repetitions, strict control, and no chasing numbers.

For muscle gain, three sets of six to ten per side with ninety seconds rest. For strength, four sets of five to eight per side with two minutes. In a fat loss phase, three sets of eight to twelve per side with a minute.

Progress by lengthening the lever, not by adding repetitions. The path runs from bent knee lying wipers, to straight leg lying wipers, to bent knee hanging wipers, to full straight leg hanging wipers, and each step is a substantial jump.

Grip will limit the hanging version for many people. Straps are a reasonable answer, and using them shifts the limit back to the muscles you meant to train.

Schoenfeld and colleagues found a dose response between weekly hard sets and hypertrophy, and the practical implication is that this movement alone will not supply enough abdominal volume. Pair it with something you can load.

Refalo and colleagues found stopping a rep or two short of failure produces comparable growth to going all the way, which matters more than usual here, because a failing wiper is the repetition where your legs fall.

Where it fits in your split

At the end of an upper body session, once or twice a week, and only when you are not already exhausted.

On push, pull and legs it fits after the pulling on pull day. On a two day upper split it closes the shoulders and back session. On a bro split it belongs on abs day after your flexion work. On an upper and lower split it serves as the rotational movement in the upper session. On a bodyweight programme it is an advanced pull day option.

Do not put it after heavy deadlifts or chin ups, when your grip and lats are spent. You will fail on your hands, and failing on your hands in the middle of a rotation is exactly the scenario worth avoiding.

For most people the honest advice is that this is optional. If your programme already contains a loaded rotation and a hanging leg raise, wipers add difficulty rather than a missing quality. Train them because you want the skill and the challenge, not because you think your obliques require them.

Two or three sets, once or twice a week, is plenty.

Variations worth knowing

Lying windshield wipers on the floor, with the shoulders anchored under something fixed, are far easier to control and are where the movement should be learned.

Bent knee wipers shorten the lever considerably and are the correct first progression in either position.

Hanging windshield wipers are the full version, and are limited by grip and lat endurance as much as by the trunk.

Straight leg lying wipers sit neatly in the middle, giving you the full lever without the hanging demand.

The hanging leg raise is the prerequisite, and if it is not yet strict, that is the exercise you should be doing instead.

And the cable twist trains the same rotation standing, with a load you can select precisely, which makes it the better choice if oblique development rather than difficulty is the goal.

What the evidence says

Escamilla and colleagues compared traditional and nontraditional abdominal exercises and found that oblique involvement varies widely between movement patterns, which supports including a genuinely rotational exercise rather than assuming flexion work covers it.

In their comparison of Swiss ball and traditional abdominal exercises, Escamilla and colleagues found that positions demanding greater whole body control produced greater abdominal involvement, which is consistent with why a slow, controlled wiper is so much harder than a swung one.

McGill argued for training the trunk to control load and resist unwanted movement rather than repeatedly flinging the spine through range, which is the argument for slow rotation with a lever you can hold.

Cholewicki and colleagues measured lumbar loads during very heavy lifting and showed how rapidly spinal demands rise with load and position, which is the mechanical reason a dropped leg caught at the bottom of the arc is worth avoiding.

Pallares and colleagues found full range training produced better adaptations than partial range work, which supports building towards the full arc, provided you get there by shortening the lever rather than by swinging.

Schoenfeld and colleagues found a dose response between weekly hard sets and muscle growth, which is why wipers should sit alongside loaded abdominal work rather than replacing it.

Refalo and colleagues found stopping short of failure produces comparable hypertrophy to training to failure, supporting ending the set while every repetition is still controlled.

Common questions

Are windshield wipers bad for my back?

Rotation under load is not inherently harmful. What is unwise is a very long lever moving fast with gravity supplying most of the force, which is what a dropped and caught leg is. Slow the movement down, shorten the lever, and the exercise is fine.

Hanging or lying?

Lying, until you can do them slowly with straight legs. The floor version anchors your shoulders and removes the grip limit, so you can concentrate on controlling the rotation. Hanging is the progression, not the starting point.

How is this different from a cable twist?

The cable twist is standing, loaded by a stack you can choose to the kilogram, and easy to progress. Wipers are loaded by your own legs, which you cannot adjust. If oblique growth is the goal, the cable twist is the better tool; wipers are the harder skill.

Will they carve out my obliques?

They will train them. Whether the result is visible is a body fat question, and no abdominal exercise burns fat from the area around it. Rotation work builds muscle; it does not reveal it.

When am I ready for the hanging version?

When you can perform ten strict hanging leg raises with no swing, and hold your legs vertical for a few seconds at the top. If either is missing, work on those first and the wipers will arrive much faster.