Legs · Split squat

Smith Machine Bulgarian Split Squat

The Smith machine Bulgarian split squat is a single-leg squat with your rear foot on a bench and the Smith bar across your upper back. The rails remove most of the balance demand, so you can focus on the working leg and load the quads and glutes with a stable bar path.

Also known as: Smith split squat, Smith machine rear foot elevated split squat, Smith Bulgarian split squat

Muscle group: Legs
Movement pattern: Split squat
Type: Compound
Equipment: Smith machine, Bench
Difficulty: Intermediate

What muscles does the smith machine bulgarian split squat work?

Primary movers

Quadriceps
Gluteus maximus

Assisting muscles

Adductors
Hamstrings
Calves
Core

With the rear foot elevated, the front leg does most of the work. The quads and glutes lift you, and a deeper split increases the glute involvement.

The Smith machine keeps the bar on a fixed path. That is a big reduction in balance demand compared with a free barbell, and a common reason to choose it.

The rear leg gives some help and stretches the hip flexor, which can feel uncomfortable at first.

Front foot position matters. A longer stance emphasises the glutes, and a shorter one the quads.

How to do the smith machine bulgarian split squat

Setup

1
Place a bench behind you, in line with the Smith bar.
2
Set the bar at shoulder height and duck under it, resting it on your upper traps.
3
Place the top of your rear foot on the bench and step the front foot forward.
4
Unhook the bar and brace your core.

Execution

1
Lower yourself by bending your front knee.
2
Keep your torso upright and your front heel flat.
3
Descend until your front thigh is parallel to the floor or lower.
4
Drive through your front foot to stand.
5
Complete all reps on one leg, then switch.
6
Re-hook the bar when finished.

Common smith machine bulgarian split squat mistakes

Front foot too close

The knee then travels too far forward and the heel lifts.

The fix: Step further out so your shin is near vertical at the bottom.

Leaning forward

Folding at the waist shifts the load away from the legs.

The fix: Keep your chest up and your torso upright.

Pushing off the back foot

The rear leg then does too much.

The fix: Use the back foot for balance only.

Wrong stance

A foot placement that does not match the bar path feels awkward.

The fix: Adjust the bench and front foot until the movement is smooth.

How many sets and reps?

Goal	Sets	Reps	Load	Rest
Hypertrophy	3	8–12 per leg	Moderate to heavy	90 s
Strength	3–4	5–8 per leg	Heavy	2 min
Beginner	2–3	8–10 per leg	Light	60–90 s

A good way to load single-leg squats when balance is a limiting factor. Start light and find your foot position. Match reps on both legs.

Running the smith machine bulgarian split squat in your next block? Hercules logs every set, shows last session's numbers before you lift, and suggests when to add weight.

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