What Muscles Work In A Lateral Lunge, And How To Work It Out For Any Exercise

What muscles work in a lateral lunge

The gluteus maximus and quadriceps of the bending leg, working eccentrically to control the body as it sinks sideways and down. The adductor group of the straight leg, lengthening as it slides out to the side, then contracting to help pull the body back to centre. The gluteus medius of the bending leg, stopping the pelvis tipping sideways under the shifted weight. And the deep core, resisting the trunk being pulled off to one side rather than staying stacked over the base.

That's the answer, and like the squat, the lunge, the deadlift, the press-up, the row, the shoulder press, the loaded carry, the suspended plank, the sprint, the medicine ball throw, the vertical jump, the kettlebell swing, the band wood chop, the bird dog, the single-leg overhead reach and the hip hinge before it, it came from a method rather than a memorised list.

Nobody's taken a client yet, and that's fine

Somebody weighing up a career change into personal training can watch a client step sideways into a lunge and file it under "a lunge, just sideways," which misses that the straight leg is doing something a forward lunge never asks of it: lengthening through the adductors under load, in the one direction most gym programmes never train. One of the things you learn on our CIMSPA-recognised personal training course is a method that turns a side-to-side movement into a specific list of muscles, each doing exactly the job it's built for, on every rep. The course teaches it in the browser too, so it can be watched, read or answered by dictating the answer back, whichever fits the hour you have.

Seventeen exercises in, and the method still hasn't changed

A squat, a lunge, a deadlift, a press-up, a row, a shoulder press, a loaded carry, a suspended plank, a sprint, a medicine ball throw, a vertical jump, a kettlebell swing, a band wood chop, a bird dog, a single-leg overhead reach and a hip hinge have all run through the same four steps:

1. Decide where the force is acting on the body
2. Identify which muscles work directly against that force (muscles that lengthen are easiest to see)
3. Identify which secondary muscles assist that movement
4. Identify which muscles would support that joint / movement

Run it on a lateral lunge.

One, where is the force acting? At the hip and knee of the bending leg, as the body shifts sideways over it and gravity pulls the mass down and out to that side.

Two, what works directly against it? The gluteus maximus and quadriceps of the bending leg, lengthening as the body sinks, then contracting to drive back up to standing. The adductor group of the straight leg, lengthening as it slides away from the body.

Three, what assists? The adductor magnus of the bending leg, helping the glute extend the hip back to standing, and the hamstrings of the bending leg, assisting the glute through the same range.

Four, what supports? The gluteus medius of the bending leg, holding the pelvis level rather than letting it drop toward the straight leg, and the deep core, keeping the trunk stacked over the base instead of leaning with the movement.

Why that fourth answer changes how it's coached

A trainer who only knows "lateral lunge, step sideways" has nothing specific to watch when a client's trunk tips over as they sink. A trainer who's run the four steps knows that's the glute medius losing the job of holding the pelvis level, and can cue the exact muscle instead of repeating a general "stay tall" that isn't landing.

Point it at anything

A curtsy lunge, where the moving leg crosses behind rather than out to the side, asking more of the adductors through a longer range. A lateral step-down off a low box, where the same sideways control happens under body weight alone instead of a stride. The side-to-side phase of an agility drill, where the hinge happens at speed instead of under a held position. Any sideways movement a client already does can be answered the same way, without a new list to learn.

PT Manager opens the moment you sign up with any FASTER course, and adding real clients unlocks the day you pass one. Read more about the Level 3 Personal Trainer Certificate this method comes from.

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