Barbell Lunge
Also works: Calves · Glutes · Hamstrings
A loaded step forward, down into a deep split position, and back to the start on the same leg. With the bar on your back you cannot counterbalance by leaning, so the barbell lunge exposes hip stability and side-to-side strength differences that a two-legged squat hides completely.
Own the movement
Set up first, then execute. Every cue below is something you can check on your next set.
Before the first rep
- Set the hooks just below shoulder height and rack the bar across the rear delts, exactly as for a back squat.
- Step back into open floor with at least two metres of clear space in front of you.
- Feet hip-width, not touching. A narrow start line makes every rep a balance test you did not sign up for.
- Brace the trunk and set the ribs down before the first step — the step itself should not change your torso position.
- Pick a fixed point on the wall at eye level and keep your eyes there; looking down tips the bar forward.
Every rep
Breathing & tempo — Inhale and brace at the top of each rep, hold through the descent, exhale as you drive back up. Two to three seconds down, controlled up — never rush the step out.
Before you load it
- Take the bar out of a rack and walk into open floor. Lunging inside a rack means a failed rep with nowhere to step.
- If your balance is genuinely poor, learn the pattern with dumbbells first. A barbell falling off your back mid-lunge lands on your feet or your neck.
Sets, reps & load
Where to start, and what to change when it stops being hard.
Start with the empty 20 kg bar and prove you can hit 10 controlled reps per leg with a vertical torso before adding a plate. A useful marker is 40-50% of your back squat for sets of 8 per leg. Add 2.5 kg only when both legs match for reps and neither knee drifts inward.
What goes wrong
The errors that show up most often, and the cue that fixes each one.
Lengthen the step until the front shin is near vertical at the bottom. Mark the landing spot with a tape line and hit it every rep.
Drive the front knee out over the second toe on the way up and slow the descent to three seconds. If it still caves, cut the load by a third — this is hip control, not leg strength.
Keep the bar stacked over your hips and squeeze the glute of the rear leg to stop the pelvis tipping forward. Film one set from the side to see what upright actually looks like.
Do all the reps on one leg, then all on the other, and start each set with your weaker side. Match the strong side's reps to whatever the weak side managed.
Why bother
One leg carries roughly your whole load while the other only stabilises, so the front hip has to control the knee against a moment arm that a bilateral squat splits in half. That is why a lifter who back-squats 140 kg often struggles with 50 kg on their back here, and why the weaker side shows up within the first two reps.
The barbell placement is what separates this from a dumbbell lunge. Dumbbells hang below your centre of mass and act as a keel; a bar on your traps sits above it and makes every wobble larger. That is more balance demand and more trunk work, but it also means you should be conservative with the load — falling out of a barbell lunge has nowhere good to go.
Where it fits
After your main squat or hinge, 3-4 sets of 8-10 per leg, once or twice a week. Do all reps on one leg before switching so fatigue is symmetrical. Skip it in the same session as heavy Bulgarian split squats — the overlap is near total and the soreness is memorable.
If this one isn't it
No kit, too hard, or too easy — here's where to go instead.
Same job, different kit
When this gets easy
Asked and answered
Forward lunge or reverse lunge?
Reverse lunges are kinder to the front knee and easier to balance, because you step into the position rather than decelerating into it. Forward lunges demand more deceleration control, which has value if you play sport. If your knees complain, step backwards instead.
Should my knee stay behind my toes?
Some forward knee travel is normal and fine. What matters is that your front shin is not so steeply angled that your heel comes off the floor — that means the step was too short and the knee is taking load it does not need to.
Why is one leg so much weaker?
Because bilateral squatting has been hiding it. Almost everyone has a 5-15% difference. Start every set with the weaker leg, cap the stronger leg at the same rep count, and expect the gap to close over two or three months rather than two or three sessions.
Barbell or dumbbells?
Dumbbells for most people most of the time: they load the legs just as well, hang below your centre of mass and can be dropped safely. Use the barbell when your grip or your dumbbell rack has run out of load, and accept that the balance demand goes up sharply.