The Bulgarian split squat is one of the most demanding and most effective unilateral lower body exercises available. Adding a kettlebell to the movement opens up a range of loading positions that are either impossible or impractical with a barbell and less varied with dumbbells, each of which changes the training stimulus in specific and meaningful ways.
Understanding which kettlebell position produces which effect allows the exercise to be matched precisely to the training goal rather than defaulting to whichever grip feels most natural.
What the Bulgarian Split Squat Is
The Bulgarian split squat (also called the rear-foot elevated split squat) is a split squat variation where the rear foot is elevated on a bench, box, or sofa behind the athlete. The front leg performs the squatting movement while the rear foot is elevated for balance rather than for loading.
This rear-foot elevation changes the Bulgarian split squat significantly from a standard split squat:
Greater range of motion: The elevated rear foot allows the front hip to travel through a greater range of flexion before the rear knee contacts the floor, increasing the depth and the training stimulus.
Increased front leg loading: The elevated rear foot reduces its contribution to the movement, placing more of the total load on the front leg. Research suggests the front leg bears approximately 85 to 90 percent of the total load during the Bulgarian split squat, making it a near-unilateral exercise.
Hip flexor stretch on the rear leg: The extended and elevated position of the rear leg places the hip flexors of that leg under a sustained stretch throughout the exercise.
How the Kettlebell Changes the Bulgarian Split Squat
Compared to the barbell version (which places the load across the upper back) and the dumbbell version (which places the load at the sides), the kettlebell offers:
Multiple grip positions: The kettlebell can be held in the goblet position, the racked position, the suitcase position, or the overhead position, each creating a different loading pattern and a different neuromuscular demand.
Offset centre of mass: The kettlebell’s bell hangs below the handle, creating a lower centre of mass for the load than a dumbbell of equivalent weight. This changes the grip demands and the stability requirements compared to dumbbell loading.
Racked position accessibility: The kettlebell racked position (forearm vertical, bell resting on the outside of the forearm and upper arm) is much more practical for split squats than the barbell front rack and provides a unique anti-rotation core demand.
Better for home and travel training: A single kettlebell can provide meaningful loading for the Bulgarian split squat in contexts where barbells and dumbbell racks are unavailable.
Muscles Targeted
Primary (front leg):
- Quadriceps: Drive the knee extension during the return phase
- Gluteus maximus: Provides hip extension throughout
- Hamstrings: Contribute to hip extension and knee stability
Secondary:
- Gluteus medius: Maintains pelvic level throughout
- Core: Anti-rotation and anti-lateral-flexion stability (especially pronounced with asymmetric kettlebell positions)
- Hip flexors (rear leg): Under sustained eccentric stretch throughout
Position-dependent emphasis:
The relative contribution of each muscle changes significantly with the kettlebell position, as described below.
The Kettlebell Positioning Options
Position 1: Goblet Bulgarian Split Squat
What it is: The kettlebell is held at the chest in both hands with the handle pointing upward, identical to the goblet squat position covered in the closed chain knee exercises article on this site.
What it produces:
The goblet position shifts the centre of mass forward and upward, which assists with maintaining an upright torso during the Bulgarian split squat. This is the most accessible and most commonly recommended kettlebell position for the Bulgarian split squat because:
- The bilateral grip is the most stable of all positions
- The forward mass helps prevent excessive trunk lean
- The loading is symmetrical, eliminating the anti-rotation demand
- It allows the heaviest loading of any unilateral kettlebell position
Who it is best for: Beginners to the Bulgarian split squat, anyone prioritising maximum loading, and anyone using the exercise as a primary quad and glute development exercise.
How to do it:
- Hold the kettlebell at the chest with both hands
- Place the rear foot on the bench
- Lower until the front thigh is approximately parallel and the rear knee approaches (without touching) the floor
- Drive through the front heel to return
- Complete all reps on one side before switching
Sets and reps: 3 to 4 sets of 8 to 10 per side
Position 2: Racked Bulgarian Split Squat
What it is: The kettlebell is held in the racked position on one side: forearm vertical, elbow tucked to the body, the bell resting on the outside of the forearm and upper arm.
What it produces:
The racked position creates an asymmetric loading that challenges the anti-rotation and anti-lateral-flexion core stability significantly more than the goblet position. The core must resist the tendency of the loaded side to collapse.
Two racked variations:
Rack on the front leg side: The kettlebell is racked on the same side as the front (working) leg. This loads the working side directly and creates a core anti-lateral-flexion challenge toward the working side.
Rack on the rear leg side: The kettlebell is racked on the opposite side from the front leg. This creates a counterbalance that some people find assists with depth and an anti-lateral-flexion challenge away from the working side.
Who it is best for: Intermediate to advanced athletes who want to combine the kettlebell Bulgarian split squat with a shoulder stability and core anti-rotation demand.
How to do it:
- Clean the kettlebell to the racked position on the chosen side
- Place the rear foot on the bench
- Maintain the racked position throughout the movement (forearm vertical, wrist straight)
- Lower and return as described above
- Complete all reps on one side before switching the racking side
Sets and reps: 3 sets of 6 to 8 per side per racking position
Position 3: Suitcase Bulgarian Split Squat
What it is: The kettlebell (or a dumbbell) is held at the side in one hand, hanging at hip height like a suitcase.
What it produces:
The suitcase position creates a lateral loading challenge where the weight on one side pulls the trunk toward that side. The core must resist this lateral pull to maintain an upright trunk throughout the Bulgarian split squat.
Two suitcase variations:
Suitcase on the front leg side: The weight is held on the same side as the working (front) leg. The core resists the tendency to lean toward the loaded side.
Suitcase on the rear leg side (counterbalance): The weight is held on the opposite side. This creates a partial counterbalance that may assist with depth and balance while creating an opposite core challenge.
Who it is best for: Athletes who want to develop lateral core stability alongside the primary lower body demand, or those who have mastered the goblet and racked positions.
Sets and reps: 3 sets of 8 per side
Position 4: Overhead Bulgarian Split Squat
What it is: The kettlebell is pressed to the overhead position on one side (arm fully extended, shoulder packed, wrist straight) and held throughout the Bulgarian split squat.
What it produces:
The overhead position is the most technically demanding and most total-body-integrating of all the kettlebell Bulgarian split squat positions. It adds:
- Shoulder stability throughout
- Thoracic mobility and extension demand
- Significant core anti-lateral-flexion demand (the overhead load amplifies any lateral trunk lean)
- The most challenging balance demand of any position
Prerequisites: Adequate shoulder mobility for a stable overhead position, solid racked and goblet Bulgarian split squat technique, and a well-established overhead press.
How to do it:
- Press the kettlebell to the overhead position on one side
- Lock out the arm and pack the shoulder (shoulder blade down and back, away from the ear)
- Place the rear foot on the bench
- Perform the Bulgarian split squat while maintaining the overhead position
- The overhead arm should remain vertical throughout, not tilting sideways
Sets and reps: 3 sets of 4 to 6 per side (the technical demand limits the appropriate rep range)
Step-by-Step Technique: Goblet Position (Primary)
The following detailed technique covers the goblet position as the primary and most accessible version.
Setup
Bench height: The rear foot elevation should be approximately knee height (40 to 50 centimetres). Higher elevation increases the hip flexor stretch and the range of motion but becomes uncomfortable above approximately 50 centimetres for most people.
Front foot distance from the bench: This is the most commonly misunderstood setup variable. Standing too close to the bench causes the front knee to travel excessively forward. Standing too far causes excessive trunk lean. The correct position is typically discovered through the first few reps: if the shin is excessively angled forward at the bottom, step further from the bench. If the trunk is leaning excessively forward, step closer.
Practical test: At the bottom of the movement, the front shin should be approximately vertical to slightly angled forward. The front knee should be at approximately 90 degrees or slightly more. The rear knee should be close to the floor without touching it.
The Descent
- Hold the kettlebell at the chest in the goblet position
- Stand on the front leg with the rear foot elevated
- Lower the body by bending the front knee and allowing the rear knee to descend toward the floor
- The front knee tracks over the second and third toe throughout
- The torso remains relatively upright, assisted by the forward mass of the kettlebell
- Continue until the front thigh is approximately parallel and the rear knee approaches the floor
- Do not allow the rear knee to contact the floor: this would provide a brief rest and reduce the training stimulus
The Return
- Drive through the front heel to extend the front knee and hip simultaneously
- The knee tracks over the toes throughout the return
- Return to the fully standing position with the hips extended and the front knee straight
- Pause briefly before the next descent
Key Technique Cues
Front heel drive: The primary force production cue. Pressing through the front heel (not the toes) shifts the loading toward the posterior chain and away from the knee. Toe-dominant loading shifts the exercise toward quad dominance and increases patellofemoral stress.
Upright torso: The torso should remain relatively upright rather than leaning significantly over the front leg. The goblet position specifically assists with this. If significant forward lean is occurring despite the goblet position, the front foot may be too far from the bench or the hip flexors of the rear leg are too tight.
Level pelvis: The pelvis should remain horizontal throughout. Any drop on the rear leg side indicates gluteus medius weakness on the front leg side.
Rear knee close to the floor: The rear knee should descend to within 3 to 5 centimetres of the floor on each rep. Stopping short of this reduces the range of motion and the training stimulus.
Controlled tempo: 2 to 3 seconds for the descent, 1 second at the bottom, 1 to 2 seconds for the return. The eccentric phase is as important as the concentric for muscle development.
Common Errors and Fixes
Error 1: Front Knee Valgus
What it looks like: The front knee drifts inward during the descent or return.
Fix: As covered in the what is knee valgus article on this site, strengthen the gluteus medius and hip external rotators. Reduce the load until correct knee tracking can be maintained throughout.
Error 2: Excessive Trunk Lean
What it looks like: The torso leans significantly forward during the descent.
Fix: Check the foot position first (too far from the bench causes lean). If foot position is correct, use the goblet kettlebell position which actively assists torso uprightness. Reduce the load if lean is load-dependent.
Error 3: Rear Foot Slipping
What it looks like: The rear foot slides off the bench during the movement.
Fix: Use a non-slip surface on the bench (a yoga mat or towel) or wear shoes with better grip. Position the rear foot with the top of the foot (laces) on the bench rather than the heel, which provides better contact.
Error 4: Rear Knee Hitting the Floor
What it looks like: The rear knee contacts the floor at the bottom of each rep, providing a brief rest and reducing the muscular demand.
Fix: Raise the bench height slightly or focus on the descent cue of stopping 3 to 5 centimetres above the floor. Use a thin mat on the floor as a visual target without allowing weight transfer.
Error 5: Loss of Racked Position
What it looks like: The forearm tilts forward, the elbow drops, or the wrist bends during the racked position variation.
Fix: Ensure the elbow stays tucked to the body and the forearm remains vertical. If the racked position cannot be maintained, the kettlebell is too heavy or the shoulder and wrist stability for this variation is not yet established.
Progressions
Beginner: Goblet position, bodyweight or light kettlebell (8 to 12 kilograms), box height at knee level. Focus entirely on technique.
Intermediate: Goblet position with moderate to heavy kettlebell (16 to 24 kilograms), or introduction of the racked position with a lighter kettlebell.
Advanced: Heavy racked position, suitcase position, or introduction of the overhead position with a light kettlebell.
Loaded progression within each position:
- Week 1 to 2: Light load, 3 x 10 per side (technique focus)
- Week 3 to 4: Moderate load, 3 x 8 per side
- Week 5 to 6: Heavy load, 4 x 6 per side
- Week 7 to 8: Maximum manageable load, 4 x 5 per side
Programming the Kettlebell Bulgarian Split Squat
As a primary lower body exercise:
When the Bulgarian split squat is the primary leg exercise in a session:
- Goblet position: 4 sets of 8 per side at moderate to heavy load
- 2 to 3 times per week
As an accessory exercise:
After primary bilateral strength work (conventional deadlift, barbell squat):
- Goblet or racked position: 3 sets of 8 to 10 per side at a moderate load
- Once per week as a unilateral accessory
Pairing with complementary exercises:
The kettlebell Bulgarian split squat develops the anterior chain (quad and glute) through a single-leg squat pattern. Pair with posterior chain exercises for a balanced session:
- Kettlebell Bulgarian split squat: 4 x 8 per side (anterior unilateral)
- Single-leg Romanian deadlift: 3 x 8 per leg (posterior unilateral)
- Lateral band walk: 3 x 15 per direction (hip abductor maintenance)
Asymmetry correction:
As with all unilateral exercises, the Bulgarian split squat reveals side-to-side strength differences. Give the weaker side one additional set per session until symmetry is within 10 percent.
Frequently Asked Questions
Is the kettlebell Bulgarian split squat as effective as the barbell version?
For most training goals, yes. The goblet and racked positions allow meaningful loading that provides sufficient stimulus for hypertrophy and strength development. The barbell version allows greater absolute loading, which is relevant for advanced athletes seeking maximum strength development. For most people, the kettlebell version offers equal or better outcomes for general athletic development while also developing the core and shoulder stability demands that the barbell version does not include.
Which kettlebell position should I start with?
The goblet position. It is the most accessible, most stable, and most commonly recommended starting point. Once the goblet version can be performed for 3 sets of 10 per side with a moderately heavy kettlebell and clean technique, the racked and other positions can be introduced progressively.
How heavy should the kettlebell be for the Bulgarian split squat?
This depends on the position and the training goal. For the goblet position, most trained adults find 16 to 32 kilograms appropriate for the 8 to 10 rep range. For the racked and overhead positions, use approximately 50 to 60 percent of the goblet weight initially. Begin conservatively and progress based on technique quality.
Can I use two kettlebells for the Bulgarian split squat?
Yes. Two kettlebells in the racked position (double rack) or hanging at the sides (double suitcase) allows greater loading than a single kettlebell. The double racked position is particularly effective, replicating some of the loading benefits of the barbell front squat while maintaining the kettlebell-specific racking position.
Is the Bulgarian split squat better than the lunge?
They develop similar muscles but through different patterns and with different demands. The Bulgarian split squat allows greater depth, greater unilateral loading, and a hip flexor stretch that lunges do not provide. The lunge involves a stepping pattern that is more sport-specific for some activities. Both belong in a complete programme rather than one replacing the other.