The Lateral Lunge: A Complete Guide From First Rep to Advanced Variations
Also called Side Lunge, Lateral Squat
Quick Intro
The lateral lunge is a lower-body exercise performed by stepping one leg out to the side, bending that knee and sitting the hips back while the other leg stays straight, then pushing back to standing.
Equipment Needed
No equipment is needed, just enough open floor space on either side to step wide.
Why the Lateral Lunge Matters
The lateral lunge asks the inner thigh (adductors) of the straight leg to lengthen under control while the side glute (gluteus medius) and the front of the thigh (quadriceps, vastus medialis) of the bent leg manage the sideways load, and the glutes (gluteus maximus) drive the return to standing. Stepping sideways instead of forward or back is what shifts so much of the demand onto the inner and outer thigh, a plane a forward lunge or a squat barely touches.
That sideways plane is the real reason this exercise earns its own place in a training routine, not just a sideways version of a familiar movement. A forward lunge and a squat both move the body up and down in a single plane, working the front and back of the thighs and the glutes in a straightforward line. The lateral lunge trains the same legs through a side-to-side range most lower-body exercises skip entirely, which matters for anything that involves cutting, side-stepping or catching balance sideways.
The lateral lunge is a useful muscular endurance exercise for the adductors, glutes and quads, with flexibility carryover from the straight leg’s stretch. Balance sees solid engagement too, from controlling the sideways step.
When to Do It
The lateral lunge fits well anywhere in a lower body session, and pairs naturally with a forward lunge or squat to cover more planes of motion in the same workout. Two to three sessions a week on non-consecutive days lets the legs recover fully between sessions.
- Existing hip or groin tightness. The straight leg’s inner thigh lengthens more here than in a forward-facing lunge or squat. Starting with a shorter sideways step and shallower depth, and building general hip mobility first, is the safer approach until that range feels comfortable.
For most people without an active hip or groin issue, this is a genuinely useful way to train a plane of motion most lower-body routines miss.
Getting Ready
A minute of hip circles and a few standing side-to-side leg swings warm up the hips and inner thighs before asking them to control the added sideways range this version introduces.
Keep the toes of both feet pointing forward throughout the step, resisting the urge to let the bent knee’s foot turn outward to make the range feel easier.
Step-by-Step Instructions
1. Starting position. Stand with your feet together, hands on your hips or clasped in front of your chest.
2. The step. Step one leg out wide to the side, bending that knee and sitting the hips back while keeping the other leg straight and both feet flat on the floor.
3. The return. Push through the bent leg’s heel to return to standing, bringing the stepping leg back to the starting position.
Complete the full set on one side, then switch, treating each leg as its own separate training effort.
How Many, How Often
| Level | Where you’re at | What to do |
|---|---|---|
| Beginner | New to the sideways stepping pattern | 3 sets of 8 to 10 reps per leg, using a shorter step and shallower depth while the hips adapt. Resting 1 minute between sets. |
| Intermediate | 12 reps per leg come easily | 3 to 4 sets of 12 reps per leg, deepening the lunge and widening the sideways step. |
| Advanced | 15 or more reps per leg come easily | Move on to the Cossack Squat, since a wider step alone stops adding much new demand at this point. |
Letting the straight leg’s knee bend during the step is the easiest way to make the range feel more comfortable while quietly taking the stretch away from the inner thigh that’s supposed to be lengthening, so a locked straight leg matters more here than how wide the step gets.
Modifications and Variations
The lateral lunge connects to two clear branches, one a different technique on the same basic movement and one a harder step forward.
For a different technique, the Bodyweight Lunge steps forward or back instead of sideways, removing the inner-thigh stretch this version adds on top of the basic lunge pattern.
For more challenge, the Cossack Squat deepens the sideways step into a full squat on the bent side, dropping the hips much closer to the floor than a standard lateral lunge asks for.
Progression path: Bodyweight Lunge (technique variant) → Lateral Lunge → Cossack Squat
Widening the sideways step, or adding a brief pause at the bottom, are reasonable ways to add difficulty within this exercise before looking to the deeper squat variation.
Common Mistakes to Avoid
Letting the straight leg’s knee bend. A bent straight leg removes the inner-thigh stretch the movement is meant to build, which is the one feature that separates this exercise from a forward-facing lunge. Keep that leg locked and the foot flat throughout the step.
Letting the bent knee track past the toes. A knee that travels too far forward over the foot places extra strain on the joint rather than the hip and thigh muscles doing the work. Sitting the hips back as the knee bends keeps the load where it belongs.
Rising up onto the toes of the straight leg. Lifting the heel off the floor on the straight side shortens the stretch through the inner thigh and takes away part of the exercise’s real benefit. Keeping that foot flat throughout the step preserves the full range.
Rushing the return to standing. Pushing back up too quickly uses momentum more than the glutes and quads that are supposed to be driving the movement. A controlled push through the bent leg’s heel keeps the muscles doing real work on the way up.
After Your Set
Stepping wide to the side works the inner thigh through a range most other lower-body exercises never reach, worth its own dedicated cool-down. A wide seated straddle, legs spread apart and the torso leaning gently forward, finishes lengthening the inner thigh that controlled every sideways rep. A standing figure-four stretch afterward, one ankle resting on the opposite knee while sitting back slightly, opens the outer hip and glute on the side that drove the return to standing.
Going Deeper
The lateral lunge sits alongside the forward lunge and the squat as a plane-of-motion variation, usually added by anyone who already handles a full forward lunge progression and wants inner-thigh and hip stability work outside the forward-and-back plane. It pairs naturally with a squat-pattern exercise like the Bodyweight Squat in the same session, balancing a sideways, single-leg movement with a straightforward two-leg one.
The straight leg’s knee tends to soften more and more as the legs fatigue late in a set, letting someone finish the reps while the inner thigh stops actually lengthening under control. Checking the straight leg on every rep, not just the first few, and shortening the step the moment that knee starts to bend, keeps the exercise doing its intended job.
Someone with a solid forward lunge already can expect eight clean reps per leg at a shorter step within the first two to three weeks, and twelve reps per leg with a full sideways step somewhere in the five to seven week range.
How to Know You’re Improving
- Eight clean reps per leg at a shorter, shallower step
- Twelve reps per leg completed with a full sideways step and deeper lunge
- Fifteen reps per leg in a row with the straight leg staying locked throughout
- A comfortable first attempt at the deeper Cossack Squat position
Whether the straight leg stays fully locked and the trailing foot stays flat through an entire set is the real marker to watch, well ahead of how wide any single step reaches.
Muscles Worked
- Adductors (the inner thigh muscles, lengthening on the straight leg and pulling the body back to centre)
- Gluteus Medius (a smaller glute muscle at the side of the hip, controlling the bending hip as the weight shifts sideways)
- Vastus Medialis (the inner portion of the quadriceps, extending the bent knee to push back to standing)
- Gluteus Maximus (the largest glute muscle, extending the loaded hip out of the sideways squat)
FAQ
How is a lateral lunge different from a regular lunge? Stepping sideways shifts real work onto the inner and outer thigh, a plane a forward lunge or squat doesn’t train.
Why do I feel a stretch in my straight leg during the movement? That’s the intended effect of the sideways step. The straight leg’s inner thigh lengthens as the hips shift toward the bent side, a stretch a forward-facing lunge doesn’t create.
How wide should I step to the side? Wide enough that the bent knee reaches roughly a right angle without the straight leg’s foot lifting off the floor. A step that’s too narrow won’t create the intended sideways range.
Is the lateral lunge safe for people with tight hips? It can be, with care. Starting with a shorter step and shallower depth keeps the inner-thigh demand manageable while building the range gradually.
Next in this series: the Bodyweight Squat, a two-leg pairing that balances out this exercise’s single-leg, sideways focus.