ProgreviaBulgarian split squat: proper form, muscles worked and common mistakes
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How to do it
Rear foot elevated on a bench with the load on the front leg. Descend vertically until the front thigh is parallel, leaning the torso slightly forward to bias the glute.
Muscles worked
Main muscle: quads. Also worked: glutes. When it plans weekly volume, the generator counts each set of this exercise as one full set for quads and half a set for each secondary muscle (what is known as fractional counting).
Bulgarian split squat vs. cyclist squat: one leg against two
The Bulgarian split squat works one leg at a time, with the rear foot up on a bench; the cyclist squat, with the heels raised, works both legs at once and mainly targets the quads. In the Bulgarian the back leg is just a kickstand, so the front leg does nearly all the work and you need far less weight than on a two-leg squat. It also demands balance and hip stability, and it stretches the hip flexor of the trailing leg. Compared with dumbbell lunges or the dumbbell step-up, there's no stepping or hopping: your position stays fixed, so you can focus on going down and up.
Slot it after your heavy leg lift, or make it the main lift if you have no rack. It helps you spot and fix differences between legs and build volume with little load on your back. If your knee or hip complains, adjust the distance to the bench before touching the weight. Working 8 to 12 reps per leg, raise the dumbbells once every set reaches the same depth.
Find your distance with a test set: on the way down, the front heel should stay flat. Always start with your weaker leg, and rest the back foot on the laces or on your toes, whichever feels steadier.
Technical sheet
- Movement pattern
- Squat
- Minimum level
- Intermediate
- Technical demand
- Needs coaching
- Fatigue it generates
- High (1.4 out of 2.2)
- Risk if technique breaks down
- Medium
- Peak tension in the stretched position
- Worked one side at a time
These are the values the generator uses to decide where the exercise goes within the session.
Recommended sets and reps
As a compound lift, it fits in 3–5 sets of 5–12 reps leaving 1–3 reps in reserve (RIR). Prioritize it at the start of the session, when you're fresh.
Common mistakes to avoid
- Pushing off the back leg (or bouncing off it on the step-up) instead of loading the front leg.
- Letting your dominant side do more of the work: each arm or leg completes the same range, at the same pace.
- Always starting with your good side and doing fewer reps on the other: start with the weaker side and match its reps on the strong one.
What the research says
Because it is a multi-joint lift, the 2021 review of the repetition continuum by Schoenfeld and colleagues leaves room to choose: both heavy and moderate sets build muscle if they finish near failure, but maximal strength needs some heavy work.
Its peak tension comes with the muscle stretched, and that matters: in the trial by Maeo and colleagues (2021), seated leg curls, which stretch the hamstrings more, built more muscle than lying curls, and Pedrosa and colleagues (2022) saw something similar in the quads when training the long end of the range.
It works one side at a time. Speirs and colleagues (2016) compared the Bulgarian split squat with the back squat in rugby players over five weeks and strength improved by a similar amount, so a single-leg version does not mean giving up progress.
You do not need to reach failure on every set: according to the meta-analysis by Refalo and colleagues (2023), stopping one or two reps short gives very similar growth. The generator prescribes it with RIR for that reason.
- Schoenfeld BJ, Grgic J, Van Every DW, Plotkin DL. Loading recommendations for muscle strength, hypertrophy, and local endurance: a re-examination of the repetition continuum. Sports. 2021;9(2):32.
- Maeo S, Huang M, Wu Y, et al. Greater hamstrings muscle hypertrophy but similar damage protection after training at long versus short muscle lengths. Medicine & Science in Sports & Exercise. 2021;53(4):825-837.
- Pedrosa GF, Lima FV, Schoenfeld BJ, et al. Partial range of motion training elicits favorable improvements in muscular adaptations when carried out at long muscle lengths. European Journal of Sport Science. 2022;22(8):1250-1260.
- Speirs DE, Bennett MA, Finn CV, Turner AP. Unilateral vs. bilateral squat training for strength, sprints, and agility in academy rugby players. Journal of Strength and Conditioning Research. 2016;30(2):386-392.
- Refalo MC, Helms ER, Trexler ET, Hamilton DL, Fyfe JJ. Influence of resistance training proximity-to-failure on skeletal muscle hypertrophy: a systematic review with meta-analysis. Sports Medicine. 2023;53(3):649-665.
How Bulgarian split squat compares with other quads exercises
Of the 16 quads exercises in the catalogue, ranked from least to most fatiguing by the values the generator uses, Bulgarian split squat is number 11.
It sits in the middle of its group: it works as the day's main exercise or as a second or third one.
With different equipment, the same movement pattern offers 9 alternatives, such as Static lunge, Banded squat and Leg press.
| Exercise | Equipment | Fatigue | Technique |
|---|---|---|---|
| Leg press | machine | High (1.2 out of 2.2) | Basic |
| Dumbbell lunges | dumbbells | High (1.2 out of 2.2) | Basic |
| Box jump | bodyweight | High (1.3 out of 2.2) | Needs coaching |
| Cyclist squat | dumbbells | High (1.3 out of 2.2) | Needs coaching |
| Bulgarian split squat | dumbbells | High (1.4 out of 2.2) | Needs coaching |
| Hack squat | machine | High (1.5 out of 2.2) | Needs coaching |
| Sumo barbell squat | barbell | Very high (1.8 out of 2.2) | Needs coaching |
| Paused squat | barbell | Very high (1.9 out of 2.2) | Needs coaching |
Tension with the muscle stretched. Bulgarian split squat loads the muscle when it is longest. In the review by Kassiano et al. (2023), across eleven studies, full range of motion and partials performed in the initial part of the movement — with the muscle long — produced more growth than partials performed at the end.
One side at a time. The meta-analysis by Kassiano et al. (2025), across nine studies, found no significant difference in hypertrophy between unilateral and bilateral training; for strength, each format improved most in its own type of test.
- Kassiano W, Costa B, Nunes JP, Ribeiro AS, Schoenfeld BJ, Cyrino ES. Which ROMs lead to Rome? A systematic review of the effects of range of motion on muscle hypertrophy. Journal of Strength and Conditioning Research. 2023;37(5):1135-1144.
- Kassiano W, Nunes JP, Costa B, Ribeiro AS, Loenneke JP, Cyrino ES. Comparison of muscle growth and dynamic strength adaptations induced by unilateral and bilateral resistance training: a systematic review and meta-analysis. Sports Medicine. 2025;55(4):923-936.
Related guide
Bulgarian split squat: variations and programming
Alternative exercises
More squat exercises
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Frequently asked questions
What muscles does Bulgarian split squat work?
Bulgarian split squat mainly works the quads muscle group, plus synergist and stabilizer muscles depending on the variation.
How many sets of Bulgarian split squat should I do?
Between 3 and 5 sets per session, adjusting the total weekly volume for quads to your level (about 10–20 sets per muscle per week).
How far from the bench should my front foot be in the Bulgarian split squat?
Start with a long step, like a comfortable lunge, and do one rep without weight. If the front knee drifts too far forward or the heel lifts, lengthen the step; if the rear hip feels very tight, shorten it. Once you find the right distance, mark the spot on the floor and repeat it every session.
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