Is the Sled Backward Drag good for sore knees?

Many coaches and physical therapists use it for people whose knees dislike squats and lunges, because the load is easy to scale and there is no weight to lower. It is a way to keep training around knee pain, not a treatment for it, so keep the load where the knees stay comfortable and get persistent pain assessed.

Why does it cause so little soreness?

Most post-workout soreness comes from the lowering phase of a lift, and a backward drag has none. In a study of strength-trained men doing five sets of two 20 m maximal backward sled drags at 75% of body mass, a blood marker of muscle damage did not rise, and jump power was back to baseline by 3 hours after the session.

How heavy should the sled be?

Choose a load you can drag with steady, continuous steps and straight arms. For conditioning, use a lighter sled over a longer distance or time, and for quad strength, go heavier over shorter drags while keeping every step smooth.

How is it different from the Sled Push?

Both are leg-driven sled exercises with no lowering phase. The Sled Push uses a deep forward lean with the hips driving, while the backward drag makes every step finish with the knee straightening as you push away from the sled, so the quads do a larger share of the work and the hands have to hold the straps.

Can I do it without a sled?

Walking backward up a slope or on an inclined treadmill trains the same pattern without a sled. It is harder to load progressively, though, so a sled remains the easier way to keep adding resistance.

Sled Backward Drag

What Is the Sled Backward Drag?

Sled Backward Drag is a compound exercise that primarily targets the quads and also engages the calves, the front of the shins, and the grip and back muscles that hold the straps. It is an intermediate-level movement, although a light sled makes it approachable for most beginners and the load scales easily for stronger lifters.

You face the sled, hold a strap in each hand with straight arms and walk backward in a quarter-squat, so every step finishes with the front knee straightening against the load. The sled only moves when you push yourself away from it and there is no weight to lower, so the quads work almost entirely by shortening rather than lengthening under load. That is why coaches use the drag to add quad volume, as a conditioning finisher, or between heavy squat days with little added soreness, and why it appears in knee-focused strength programs and return-to-training plans.

The quads do most of the work, and a lower stance with a deeper knee bend shifts even more of the load onto them. The calves and the muscles at the front of the shin work at the ankle with each step as the reaching foot lands on the ball of the foot and the body moves back over it. The hips contribute less than in a Sled Push, where a deep forward lean brings the glutes in more. Because the arms stay straight, the forearms and back hold the body's position against the straps rather than moving the sled, which separates the drag from a Sled Row or a Sled Pull, where the arms do the pulling.

The drag suits athletes and general gym-goers who want quad and conditioning work that is easy on recovery, and lifters whose knees dislike deep loaded squats. If a loaded sled is too hard, start by walking backward unloaded, then add a light sled and build distance before adding weight. Holding the straps for a full set also takes grip endurance, so at first the hands may tire before the legs do.

Muscles Worked

MuscleActivation

Rectus Femoris: Primary
Vastus Lateralis: Primary
Vastus Medialis: Primary
Gastrocnemius (Lateral Head): Medium
Gastrocnemius (Medial Head): Medium
Soleus: Medium
Erector Spinae: Low
Flexor Carpi Ulnaris: Low
Gluteus Maximus: Low
Tibialis Anterior: Low

Instructions

Clip the straps and handles to the front of the sled, load it, and check that the path behind you is flat and clear for the full distance.
Face the sled, take a handle in each hand and walk backward until the straps are taut and your arms are straight out in front of you.
Sit your hips back and bend your knees into a quarter-squat, with your back flat, chest up and body weight leaning away from the sled.
Reach one foot straight back and land on the ball of that foot.
Push through the front foot and straighten the front knee to drive your body away from the sled, drawing the sled after you.
Step the front foot back past the other to take the next step, keeping the knees bent and the hips at the same height.
Keep your arms straight and the straps taut throughout, taking short, even steps so the sled never stops and starts.
Continue for the set distance or time, then stand up, step toward the sled to slacken the straps and set the handles down.

Common Mistakes

Rounding the back
Letting the back round to reach toward the sled moves load off the legs and strains the spine.
Bending the arms
Rowing the straps toward the chest turns a leg drill into an arm pull and tires the grip before the quads.
Standing too tall
Walking backward with nearly straight knees takes most of the work off the quads and turns the drag into a walk.
Overreaching steps
Very long steps make the sled lurch and stall, while short, even steps keep the quads working on every stride.
Letting the straps go slack
A slack strap jerks the shoulders and back when it snaps taut again, so keep steady tension from the first step to the last.
Knees caving in
Letting the driving knee drift inward under load stresses the knee, so keep it tracking over the middle of the foot.

Injuries

Sled Backward Drag is a low risk exercise when performed with proper technique. There is no weight to lower, nothing overhead and no impact, so the load stays easy to control, and the sled simply stops when you do.

The lower back takes the most strain when it rounds under a heavy sled, and the front of the knee can become irritated when the load is too heavy for the depth of the stance. Walking backward also means you cannot see where you are going, so tripping over equipment or uneven ground is a real risk. Check that the path is clear before every set, use a flat surface, start with a light sled and add load only while every step stays smooth.

To make it easier, walk backward unloaded or drag an empty sled with a slightly taller stance. To progress, add weight, lengthen the distance or hold a lower stance, or pair it with the Sled Push for a full sled circuit.

Stop if you feel sharp pain at the front of the knee or in the lower back, if knee pain is worse the following day, or if you feel dizzy after a hard conditioning set. Anyone returning from a knee injury should progress the load with their clinician.

Overview

Primary Focus: Quads
Equipment: Sled
Modality: Strength
Difficulty: Intermediate

Alternative Exercises

Other Names for the Sled Backward Drag

The Sled Backward Drag is also known as:

Reverse Sled Drag

Frequently Asked Questions

Q: Is the Sled Backward Drag good for sore knees?: Many coaches and physical therapists use it for people whose knees dislike squats and lunges, because the load is easy to scale and there is no weight to lower. It is a way to keep training around knee pain, not a treatment for it, so keep the load where the knees stay comfortable and get persistent pain assessed.
Q: Why does it cause so little soreness?: Most post-workout soreness comes from the lowering phase of a lift, and a backward drag has none. In a study of strength-trained men doing five sets of two 20 m maximal backward sled drags at 75% of body mass, a blood marker of muscle damage did not rise, and jump power was back to baseline by 3 hours after the session.
Q: How heavy should the sled be?: Choose a load you can drag with steady, continuous steps and straight arms. For conditioning, use a lighter sled over a longer distance or time, and for quad strength, go heavier over shorter drags while keeping every step smooth.
Q: How is it different from the Sled Push?: Both are leg-driven sled exercises with no lowering phase. The Sled Push uses a deep forward lean with the hips driving, while the backward drag makes every step finish with the knee straightening as you push away from the sled, so the quads do a larger share of the work and the hands have to hold the straps.
Q: Can I do it without a sled?: Walking backward up a slope or on an inclined treadmill trains the same pattern without a sled. It is harder to load progressively, though, so a sled remains the easier way to keep adding resistance.