Discover why Bulgarian split squats (BSS) are superior to leg extensions and learn about their advantages for building lower body strength and stability.

As a veteran personal trainer with fifteen years of experience, I’ve seen many gym-goers arrive with preconceived notions influenced by hearsay and anecdotal evidence. For instance, some people swear by barbell bicep curls as the ultimate exercise and dismiss squats as the worst.

This love-hate relationship with squats often changes when I introduce clients to Bulgarian split squats. Many quickly label BSS as the most challenging exercise. This movement involves lunges with one foot on an elevated surface about 2-3 feet behind you.

While leg extensions are popular on leg day, relying solely on isolation movements can be counterproductive. Compound unilateral exercises like Bulgarian split squats improve strength and balance while effectively targeting your quads, glutes, and hamstrings.

Table of Contents:

• Benefits of Bulgarian Split Squats Over Leg Extensions
• Problems with Leg Extensions
• Muscles Worked — Bulgarian Split Squats
• How To Perform Bulgarian Split Squats
• Programming Bulgarian Split Squats
• Bulgarian Split Squats For Specific Goals
• FAQs
• Overview

Benefits of Bulgarian Split Squats Over Leg Extensions

Below are the advantages of Bulgarian split squats over leg extensions:

Functional Strength

Whether you are a hobbyist trainer or an elite athlete, Bulgarian split squats can significantly boost your overall functionality. This compound exercise builds strength that translates to real-world movements and enhances overall athleticism.

Improves Balance and Stability

While conventional lunges are beneficial, Bulgarian split squats elevate the challenge by requiring you to perform the movement with one leg elevated behind you. This variation demands significantly more core strength, stability, and balance. As you execute the exercise, your core muscles work harder to maintain your posture, and your stabilizing muscles engage more intensely to keep you steady.

Incorporating Bulgarian split squats into your routine can dramatically enhance your coordination and stability in everyday activities. For athletes, this can translate to better performance in sports that require quick directional changes and balance. For seniors, improved balance and stability can reduce the risk of falls and injuries, promoting safer and more independent living. Additionally, the unilateral nature of this exercise ensures that both sides of your body develop evenly, addressing any strength imbalances that could lead to injury.

Strength and Muscle Building

This is why most of us exercise, isn’t it?

For those aiming to build muscle mass, Bulgarian split squats are highly effective. To maximize muscle growth, choose a weight that allows you to complete 8-12 reps with perfect form. If your goal is to increase strength, opt for heavier weights and stay in the 1-5 rep range. Alternatively, for boosting muscular strength and endurance, perform 15-20 reps on each leg. This approach not only enhances muscle hypertrophy but also improves overall lower body strength and functionality.

Reduced Injury Risk

Isolation exercises like leg extensions can place significant stress on a single joint, increasing the risk of injury. Conversely, Bulgarian split squats promote a more natural movement pattern and distribute tension more evenly across multiple muscles and joints.

Moreover, a study published in the International Journal of Exercise Science found that the knee is less involved in Bulgarian split squats than in conventional back squats. This finding suggests that Bulgarian split squats may be a better choice for individuals with knee injuries or those focusing on hip strengthening.

It’s always advisable to work with a trainer to design a personalized workout program tailored to your unique needs and fitness goals.

Calorie Burning

The high metabolic demands of Bulgarian split squats are often understated. Because you are effectively training half your body in this exercise, it leads to a significant calorie expenditure. Compound movements like Bulgarian split squats should be an integral part of your training regimen if you’re looking to shed extra weight.

Problems with Leg Extensions

Below are the problems with over-relying on leg extensions in your lower body workout:

Isolation Work

Single-joint exercises like leg extensions focus on one muscle group at a time. While they can help build muscle mass, strength, and definition in the quads, they completely neglect the hamstrings, glutes, and calves.

In contrast, compound movements like Bulgarian split squats strengthen core stabilizers that work in concert with your legs, powering most real-world movements. Unlike isolation exercises, there is no everyday activity that involves only the quads without engaging other muscle groups.

Potential Knee Issues

Isolation movements concentrate tension on a single joint, which can strain the joint over time, particularly for individuals with a history of knee problems or injuries.

If you’re dealing with any form of knee issue, it’s crucial to consult with your healthcare provider to select exercises that distribute forces more naturally.

However, it’s important to note that potential knee issues shouldn’t be a reason to entirely exclude leg extensions from your training routine.

Not The Most Functional Exercise

Your legs form the foundation of your physique, so neglecting leg training can hinder overall functionality.

Leg extensions, where you sit and extend your knees, lack real-world relevance. Conversely, Bulgarian split squats involve complex movements that mimic hip, knee, and ankle flexion and extension, translating directly to everyday activities like standing, walking, climbing stairs, or sprinting.

For athletes aiming to enhance performance, Bulgarian split squats offer benefits such as building explosive lower body power, endurance, stamina, and improving balance and stability.

While leg extensions effectively isolate the quads, many seasoned exercisers prioritize exercises that offer athletic benefits beyond simply sculpting larger or more defined quads.

Muscles Worked — Bulgarian Split Squats

Bulgarian split squats are a cornerstone in my personal training programs, tailored to all clients regardless of their fitness goals. This exercise surpasses most isolation movements like leg extensions due to its unique mechanics and broad muscle engagement:

Quads: Primarily targeted, they extend the knees and support rising from the bottom position. Adjusting form can shift focus to the rear quad, hamstrings, or glutes.

Hamstrings: Actively engage in hip extension and stabilize the descent phase to maintain balance and control.

Glutes: Activate during hip and knee extension, crucial for returning to the standing position with controlled movement.

Core: Essential for maintaining upright posture, requiring engagement of abs and deep spinal stabilizers to resist rotational forces.

Calves: Often overlooked but crucial for ankle stability, particularly during the upward phase of the movement.

In contrast, Bulgarian split squats involve these additional muscle groups compared to leg extensions. If you had to choose only one exercise for your regimen, the versatility and comprehensive benefits of BSS make it the clear choice.

How To Perform Bulgarian Split Squats

Here’s a step-by-step guide on how to perform Bulgarian split squats with proper form:

1. Start by standing in front of an elevated object, such as a flat bench or chair, with your feet hip-width apart.
2. Place the top of one foot on the bench behind you, ensuring your shin is parallel to the floor.
3. Cross your arms against your chest or hold dumbbells for added resistance.
4. Take a deep breath, engage your core, and slowly lower yourself toward the floor by bending your front knee.
5. Lower your body until your front thigh is parallel to the ground, ensuring your knee stays behind your toes.
6. Push through your front heel to return to the starting position, keeping your core engaged throughout.
7. Complete the recommended number of reps before switching to the other leg.

Performing Bulgarian split squats with proper technique ensures you target your quads, hamstrings, glutes, and core effectively while maintaining balance and stability.

Pro Tip: To minimize lower back strain, maintain an upright torso and engage your core throughout the Bulgarian split squat. Avoid leaning forward, particularly during the lifting phase with heavier weights. Incorporate dumbbells, kettlebells, or weight plates to progressively increase resistance as your strength improves.

Programming Bulgarian Split Squats

The effectiveness of your workout routine depends greatly on how you organize it. Here’s a simple plan to integrate Bulgarian split squats into your exercise regimen:

Beginners

For beginners in my personal training sessions, I typically start with two to three sets of 8-12 reps per leg. I suggest using a sturdy object like a cable machine for support if needed. It’s best to practice this exercise two to three times a week to perfect the movement.

Since beginners often begin with full-body workouts, incorporating Bulgarian split squats or similar unilateral exercises like standing or walking lunges into each session shouldn’t pose any issues.

Intermediate 

At the intermediate level, I recommend adding resistance to your Bulgarian split squats. Hold a dumbbell or kettlebell in each hand to increase the challenge. Aim for three to four sets of 6-10 repetitions per leg. It’s beneficial to include this exercise at least twice a week in your training routine.

Advanced

For advanced training, consider replacing traditional barbell back squats with Bulgarian split squats as your primary lift. Aim to lift as heavy as possible.

If your focus is on strength, perform four to five sets of 4-6 repetitions per leg. For those emphasizing hypertrophy, aim for the 8-12 rep range.

To further enhance your training, incorporate advanced techniques such as drop sets, supersets, and intraset stretching into your workouts.

Bulgarian Split Squats For Specific Goals

Bulgarian split squats (BSS) are a versatile exercise that can be tailored to fit different fitness goals. Here’s how to customize this exercise based on your specific objectives:

1. Strength Training:

Strength training is all about making your muscles stronger. When you lift weights or use resistance, like bands or your body weight, you’re working on building up your muscles. This type of exercise helps you do everyday things more easily, like carrying groceries or playing sports.

In strength training, you do exercises that target different muscle groups. For example, you might do squats to work on your legs, or push-ups to strengthen your arms and chest. The goal is to challenge your muscles, so they get stronger over time.

Strength training isn’t just for athletes or bodybuilders—it’s for anyone who wants to feel stronger and more capable in their daily life. Whether you’re lifting heavy weights or using lighter ones with more repetitions, consistency and proper technique are key to seeing progress.

2. Muscle Hypertrophy (Size):

Muscle hypertrophy is about making your muscles bigger. When you train for muscle hypertrophy, you’re focusing on exercises and techniques that promote muscle growth and size. This type of training involves lifting weights or doing exercises that put stress on your muscles, causing them to adapt and grow larger.

To achieve muscle hypertrophy, you typically work with moderate to heavy weights and aim for higher repetitions, such as 8-12 reps per set. This approach helps to fatigue your muscles, thereby triggering them to repair and build more muscle tissue.

Exercises such as squats, deadlifts, and bench presses are staples for targeting large muscle groups and promoting hypertrophy. It’s crucial to complement this training with a balanced diet, ensuring adequate protein intake to support muscle growth and recovery.

Muscle hypertrophy training is favored by individuals aiming to enhance muscle size and definition. It’s a gradual process that demands consistency and progressive overload—gradually increasing the weight or intensity of your workouts—to achieve visible changes in muscle size.

If you’re interested in building muscle size, focusing on proper form, rest, and nutrition are essential parts of your training journey.

3. Functional Fitness:

Functional fitness focuses on exercises that help you perform daily activities more easily and without injury. Unlike traditional weightlifting or bodybuilding, which may isolate muscles, functional fitness exercises often mimic movements you use in everyday life, such as squatting, bending, lifting, and reaching.

The goal of functional fitness is to improve your overall strength, balance, flexibility, and coordination, which can enhance your ability to perform tasks at home, work, or during recreational activities. This type of training emphasizes movements that engage multiple muscle groups and joints simultaneously, rather than focusing on isolated muscles.

Exercises like squats, lunges, kettlebell swings, and movements with resistance bands are common in functional fitness routines. These exercises help improve core stability, joint mobility, and overall body awareness, which are essential for maintaining independence and reducing the risk of injuries as you age.

Functional fitness training can be beneficial for people of all fitness levels, from beginners to athletes, as it promotes a well-rounded approach to physical fitness. Incorporating functional exercises into your workout routine can help you build strength and endurance that translates into real-life activities, improving your quality of life and overall fitness level.

4. Endurance Training:

Endurance training focuses on improving your body’s ability to sustain prolonged physical activity. Unlike strength or hypertrophy training, which emphasize short bursts of intense effort, endurance training involves exercises that challenge your cardiovascular system over an extended period.

The goal of endurance training is to enhance your stamina, aerobic capacity, and muscular endurance, allowing you to perform activities like running, cycling, swimming, or other forms of continuous exercise for longer periods without fatigue. This type of training also improves your body’s efficiency in using oxygen and energy sources, such as carbohydrates and fats, to support sustained physical activity.

Common endurance exercises include jogging, cycling, rowing, and swimming, as well as activities like hiking and cross-country skiing that require sustained effort over varying terrain. Endurance workouts typically involve moderate intensity levels sustained over a longer duration, helping to build cardiovascular fitness and resilience.

Training for endurance often involves progressive overload, gradually increasing the duration or intensity of exercise sessions to challenge your body and promote physiological adaptations. This can include long-distance runs, interval training, or steady-state cardio sessions, depending on your fitness goals and preferences.

Incorporating endurance training into your fitness routine can improve your overall cardiovascular health, boost your energy levels, and enhance your ability to perform daily activities with less fatigue. Whether you’re training for a marathon, improving your general fitness, or simply aiming to increase your stamina, endurance training can help you achieve your fitness goals and maintain a healthy lifestyle.

5. Athletic Performance:

Athletic performance training focuses on enhancing physical abilities and skills specific to sports or competitive activities. This type of training aims to improve speed, agility, power, strength, coordination, and overall athleticism to excel in sports and athletic endeavors.

Athletes participate in tailored training programs designed specifically for the demands of their sport. These programs incorporate drills, exercises, and conditioning routines aimed at maximizing performance in competition. The emphasis is on enhancing sport-specific skills and physical attributes essential for success in various competitive arenas such as fields, courts, or tracks.

Key components of athletic performance training include:

1. Strength and Power: Exercises such as Olympic lifts, plyometrics, and resistance training are utilized to develop muscle strength, explosive power, and speed. These exercises enable athletes to generate force rapidly and effectively, crucial for executing sprints, jumps, and swift movements in sports.

2. Speed and Agility: Training drills and exercises focus on improving sprinting speed, acceleration, deceleration, and agility. Techniques such as ladder drills, cone drills, and shuttle runs enhance footwork, change of direction, and reaction time, crucial for sports that require quick movements and directional changes.

3. Endurance and Stamina: Endurance training methods, such as interval training, long-distance running, and sport-specific conditioning drills, not only enhance cardiovascular fitness but also bolster muscular endurance. By building stamina, athletes can sustain peak performance levels over prolonged periods of play or competition.

4. Flexibility and Mobility: Incorporating stretching routines, dynamic warm-ups, and mobility exercises into your regimen can significantly enhance joint flexibility, increase range of motion, and improve overall mobility. These practices not only reduce the risk of injury but also promote fluid and efficient movement patterns crucial for optimizing athletic performance.

5. Sport-Specific Skills: Engaging in deliberate practice and honing technical skills, strategies, and tactics specific to the athlete’s sport are essential components of performance training. This includes integrating sport-specific drills, simulated game scenarios, and mental preparation to sharpen decision-making abilities, spatial awareness, and overall competitive readiness.

Athletic performance training programs are customized for each athlete. They consider factors such as sport, position, strengths, weaknesses, and competitive goals. Coaches and trainers work closely with athletes to develop comprehensive training plans that address specific performance metrics, monitor progress, and adjust training strategies to optimize athletic performance during competition.

Other Articles for Squats:

• The Front Squat Decoded: A Comprehensive Guide to Mastering this Essential Exercise
• Hack Squats Workouts, Benefits, Variations, and Performance Tips
• Best Zercher Squat to Build Lower Body Size and Power
• One and a Half Squat: Muscles, Benefits, Mistakes, and Alternatives
• Best Bulgarian Split Squat For Leg Power, Size, and Mobility
• Goblet Squats For Optimal Lower Body Strength and Flexibility

FAQs — Bulgarian Split Squats

What muscles do Bulgarian split squats work?

Bulgarian split squats primarily target the quadriceps (front thigh muscles), hamstrings, glutes (buttocks), and calves. They also engage the core for stability.

Are Bulgarian split squats good for beginners?

Certainly! Initially, Bulgarian split squats can be adapted for beginners by starting with bodyweight only and using a stable support for balance. As strength improves, gradually adding weights or resistance can increase the difficulty.

How do Bulgarian split squats compare to regular squats?

Bulgarian split squats are unilateral exercises, focusing on one leg at a time, which improves balance and targets muscles differently than bilateral squats. They can also be less stressful on the lower back and knees for some individuals.

What equipment do I need for Bulgarian split squats?

To perform Bulgarian split squats effectively, first, you typically need a bench, step, or elevated surface to place one foot behind you. Additionally, adding dumbbells, kettlebells, or a barbell can increase resistance.

How often should I do Bulgarian split squats?

The frequency depends on your fitness goals and overall workout routine. Beginners may start with 1-2 times per week, while more advanced individuals may incorporate them into their leg workouts 2-3 times per week.

Can Bulgarian split squats help with knee pain?

For some people, Bulgarian split squats can be less stressful on the knees compared to other exercises like regular squats or leg extensions. Proper form and technique are essential to minimize strain.

Are Bulgarian split squats better than leg extensions?

Both exercises have their benefits. Bulgarian split squats are functional, engage multiple muscles, and improve balance, while leg extensions isolate the quadriceps. The choice depends on individual fitness goals and preferences.

Overview

Bulgarian split squats surpass machine leg extensions in various aspects such as weight loss, muscle building, strength development, and enhancing balance, stability, coordination, and functional strength.

However, integrating leg extensions into your workout routine is still beneficial. I recommend maintaining a balanced regimen that includes both compound and isolation exercises to promote muscle growth, strength, shape, symmetry, balance, and overall fitness.

If you have questions about Bulgarian split squats, leg extensions, or any other exercises, feel free to ask in the comments below, and I’ll gladly provide assistance!

References;

• 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 (Basel). 2021;9(2):32. Published 2021 Feb 22. doi:10.3390/sports9020032
• Mackey ER, Riemann BL. Biomechanical Differences Between the Bulgarian Split-Squat and Back Squat. Int J Exerc Sci. 2021;14(1):533-543. Published 2021 Apr 1.
• Krzysztofik M, Wilk M, Wojdała G, Gołaś A. Maximizing Muscle Hypertrophy: A Systematic Review of Advanced Resistance Training Techniques and Methods. Int J Environ Res Public Health. 2019;16(24):4897. Published 2019 Dec 4. doi:10.3390/ijerph16244897
• Calatayud, J., Vinstrup, J., Jakobsen, M. D., Sundstrup, E., Brandt, M., Jay, K., Colado, J. C., & Andersen, L. L. (2016). Importance of mind-muscle connection during progressive resistance training. European journal of applied physiology, 116(3),527–533. https://doi.org/10.1007/s00421-015-3305-7
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