Sled Pull

What the sled pull actually trains

A sled pull is a loaded locomotion exercise in which you attach yourself to a weighted sled with a harness or hand straps and walk or run forward, dragging it behind you.

The training effect is conditioning and, at heavier loads, leg drive. The glutes, hamstrings and quads produce the force, the calves push off, the trunk holds a forward lean against a constant backwards pull, and the forearms work if you are using straps rather than a harness.

The feature that makes sled work genuinely different from everything else in a gym is what is missing. There is no eccentric component. Nothing lowers you, nothing stretches under load, nothing decelerates. Roig and colleagues found that eccentric training produces greater gains in muscle strength and mass than concentric training, which is exactly why sled work builds so little: you are doing concentric only work, and a lot of it.

The flip side of that is the reason to do it. No eccentric loading means almost no muscle damage and almost no soreness. You can pull a sled hard the day after squats, or the day before them, and turn up to the next session unaffected. Very few hard things you can do in a gym have that property.

So be clear about the trade. This is not leg training. Schoenfeld and colleagues found a dose response between weekly hard resistance training sets and hypertrophy, and dragging a sled does not contribute to that count in any useful way. What it does is add hard work to your week without spending recovery.

It is also close to the lowest technical risk exercise in the building. Nothing to balance, nothing overhead, nothing to drop, and the failure mode is that the sled stops moving. Alongside carries and ergometers, it deserves more credit than the flashier conditioning options.

Setting up and executing

Load the sled and attach the harness or hand straps.

Step into the harness, or take a strap in each hand, and walk forward until the slack is gone and the strap is tight.

Set the feet under the hips, brace the abdominals and lean forward from the ankles into the resistance. The lean is what gives you leverage.

Drive the first few steps hard to break the sled loose, since static friction is always the hardest part.

Once it is moving, take short, powerful steps rather than long strides, keeping the eyes forward and the chest up.

Hold the same lean for the whole length, then stop, turn the sled around and go again.

The mistakes that cost you the most

Standing too upright is the fault that makes sled pulling feel useless. Without a forward lean you have no angle to push against, so the sled drags you back into a shuffle and you end up walking on the spot. Lean from the ankles with a stiff body, as though the strap is holding you up.

Turning to look at the sled breaks that lean and twists the trunk under tension. It is also entirely unnecessary. Face forward.

Overloading it is the most common programming error. A sled loaded to the point where you grind forward at a crawl trains grinding. Moderate loads moved with intent give you more total work and a better use of the time. Heavy is a variation, not the default.

Taking long strides puts you in weak positions against constant resistance. Short, frequent steps move a sled better.

And treating it as a leg builder leads to disappointment. Schoenfeld's review of squatting kinematics describes how joint angles determine loading in lower body exercise, and a sled never puts your legs in the loaded, lengthened positions a squat does. Cholewicki and colleagues also showed spinal position under load matters greatly, so the forward lean deserves a braced trunk rather than a rounded one.

Sets, reps and rest by goal

Programme in distance rather than reps.

For general conditioning in a muscle building phase, four lengths of twenty to thirty metres at a moderate load with ninety seconds between them, placed at the end of a session. Hard enough to matter, light enough that it costs you nothing tomorrow.

For heavier leg drive work alongside a strength focus, five lengths of around fifteen metres with a heavy sled and two minutes rest. This is the version that feels most like lifting, and it is the version most worth limiting.

In a fat loss phase, eight lengths of thirty metres at a brisk pace with a minute of rest is a straightforward conditioning session. Total activity and effort determine the result, not the equipment.

Progress by adding distance, adding lengths or reducing rest before you add load. Most people go heavy far too early and end up doing a slow, unpleasant version of the exercise.

Sled work can be done frequently, two or three times a week, precisely because it does not accumulate the fatigue that running or heavy lifting does.

Where it fits in your split

At the end of a session, or on its own day.

On push, pull and legs, it works as a leg day finisher or as a standalone conditioning session. On an upper and lower split, use it after lower days or on off days. On a bro split it fits at the end of leg day or on a rest day. If you have access to a sled and a stretch of turf, a session of nothing but sled work and carries is a perfectly good use of forty minutes.

The reason to place it after lifting rather than before is simply that the first few lengths are hard on the legs, and there is no reason to arrive at squats already tired.

The most valuable role sleds play, though, is on days when you would not otherwise train. A sled session on a rest day gives you hard work, a raised heart rate and a genuine training stimulus while leaving your next lifting session completely intact. Very little else does that.

Variations worth knowing

The sled push, driving from handles rather than dragging from a strap, loads the quads and calves more directly and is the version most people find hardest.

The backward sled drag, walking in reverse while facing the sled, loads the quads heavily and is widely used by people whose knees dislike other quad work.

A harness sprint drag with a light sled trains acceleration rather than conditioning, and should be done in short, fully rested efforts.

The rope pull, hauling the sled towards you hand over hand from a standing or seated position, turns the exercise into back and grip work.

The sled row walk, stepping backwards while rowing the strap into your ribs, adds a genuine upper back component to the drag.

And plain loaded carries with dumbbells or a trap bar deliver much of the same conditioning stimulus with no sled and no turf required.

What the evidence says

Roig and colleagues found that eccentric training produces greater improvements in muscle strength and mass than concentric training, which is the most useful study for understanding sled work. A sled drag is concentric only, which explains both the lack of soreness and the lack of growth.

Speirs and colleagues compared unilateral and bilateral squat training in rugby players and found single leg work favourable for sprint and agility outcomes, supporting the value of the alternating leg drive a drag demands.

Liao and colleagues reviewed unilateral versus bilateral resistance training and found broadly comparable improvements, a helpful corrective to any claim that sled work is uniquely necessary. It is useful, not magic.

Schoenfeld's review of squatting kinematics describes how joint angles and torso position govern lower body loading, which explains why a forward lean gives you leverage and an upright posture leaves you shuffling.

McGill's work on core training emphasises trunk stiffness under load rather than trunk movement, which is what holding a lean against constant tension requires.

Cholewicki and colleagues measured lumbar spine loads during heavy lifting and found spinal position has a substantial effect on compression, supporting a braced, flat trunk during the lean.

Schoenfeld and colleagues found a dose response between weekly hard sets and hypertrophy, which is why sled lengths should not count as leg training volume however hard they feel.

Common questions

Will sled pulling build my legs?

Not meaningfully. There is no eccentric loading, and eccentric work is a large part of what drives growth. Your legs will burn and your heart rate will climb, but the stimulus for size is far below what squats and lunges provide. Use sleds for conditioning and loaded lifts for size.

How heavy should the sled be?

Lighter than you think. A load that lets you move continuously with a strong lean and short powerful steps gives you far more total work than one that reduces you to a grind. Save the very heavy sled for occasional short lengths.

Push or pull?

Close siblings with different emphases. The push loads the quads and calves more directly and is generally harder; the harness pull is easier on the shoulders and simpler to sustain for distance. Most people should do both. There is no meaningful winner.

Why am I never sore from sled work?

Because there is no eccentric component. Nothing lowers under load, so there is very little muscle damage. That is a feature rather than a defect, and it is what lets you do hard sled sessions without compromising your lifting.

Can this replace my cardio?

Yes, if you have access to a sled and enough space. It raises the heart rate as effectively as an ergometer, involves more muscle, and carries no impact. The limits are equipment, space and the fact that you cannot pace it as precisely as a machine.