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Barbell lunge: one leg at a time, under a bar

Also called: barbell walking lunge, barbell reverse lunge. All one movement, one page.

By

We compute it and we cite it. We do not test gear. How we know this.

Short answer

Bar on your back, step out, drop the back knee toward the floor, drive back up. One leg at a time.

Pattern
Lunge
Equipment
Barbell · Plates · Squat rack
Usual bar
45 lb / 20.4 kgOhio Power Bar, 45 lb

Barbell lunge setup

  1. 01Bar on your back as if you were squatting. Unrack and step clear.
  2. 02Feet under your hips. Chest up.

Barbell lunge form, step by step

  1. 01Step forward (or backward) into a long stride.
  2. 02Drop straight down until the back knee is just off the floor.
  3. 03Drive through the front heel to come back up.
  4. 04Alternate legs.

How to load the bar for the barbell lunge

Before the barbell lunge is a rep, it is a number on the bar. Plates go on in pairs, one per sleeve, and the bar itself is part of the total — a 45 lb bar with a 45 on each side is 135 lb, not 90. This animation walks the three loads you will meet most often.

Our own render, modelled to the IPF bar spec and the published plate spec table.An original 3D animation showing how the three most common barbell loads are built. A 45 lb bar starts empty; a 45 lb plate slides onto each sleeve to make 135 lb, a second pair makes 225 lb, and a third pair makes 315 lb. The running total and the plates-per-side count are shown throughout. This is an illustration of a class of equipment, not footage of a specific product.Original animation by BarWeight — an illustration of this class of equipment, not footage of a specific product, and not a demonstration of how to perform a lift.

Need a different number? Run it through the plate math calculator.

Barbell lunge video demonstration

Reading the steps only gets you so far, and a render cannot show you what a human body does under a bar. This is the barbell lunge demonstrated by a coach, not by us — we did not make this video, we do not host it, and we do not earn anything from it.

Demonstration

The Almighty Lunge: DB / Barbell

Alan Thrall (Untamed Strength)

The Almighty Lunge: DB / Barbell — Alan Thrall (Untamed Strength). Embedded from YouTube; this site did not produce the video.Alan Thrall co-owns Untamed Strength Gym and has produced widely-referenced barbell technique tutorials for over a decade; long-standing reputation in the strength training community.

Common barbell lunge errors

  • Stride too short, which jams the front knee forward.
  • Torso pitching over the front leg.
  • Losing balance because you loaded it like a squat.

Barbell lunge: muscles worked

Primary

  • Quadriceps
  • Gluteus maximus

Secondary

  • Hamstrings
  • Adductors
  • Erector spinae
  • Abdominals

How we know: Standard functional anatomy — which joints move and which muscles cross them. Convention and reasoning, not a measured EMG result.

Barbell lunge: what the evidence does and does not say

No EMG source was located for the barbell lunge. The muscle list is standard functional anatomy for a single-leg squat pattern under load.

How to program the barbell lunge

Training convention: 3 sets of 8-12 per leg as a squat accessory. Balance limits the load long before strength does.

Rep ranges are training convention. They are what most lifters and coaches do, not a measured result, and nothing on this page is medical advice.

Run the numbers

Knowing the lift is half of it. The other half is loading the bar correctly.

Questions people actually ask

▶How long should my stride be on a barbell lunge?

Long enough that you can drop straight down without the front knee jamming forward. A stride that is too short is the most common setup error on this lift.

▶Forward or reverse lunge with a barbell?

Both are done under a bar and both are covered here. The difference is the direction you step; the drop and the drive through the front heel are the same.

▶Why can I lunge so much less than I squat?

Balance runs out long before strength does. You are supporting a bar on your back over one leg, and stability is the limiter for almost everybody.

The kit this lift needs

Straight from this movement’s own equipment list. Each page below compares published specs across every model we have verified — no prices, no ratings, nothing we claim to have tested.

Sources

No study is cited for this movement because none was verified for it. The description above is mechanical instruction and standard functional anatomy. We would rather tell you the shelf is empty than put something on it.

How this page is built and what we will and will not claim: read the methodology.