The quarter squat gets a bad reputation. Scroll any fitness forum and you'll find people calling it "ego lifting" or "cheating." But that criticism misses the point. The quarter squat is a distinct exercise with a specific purpose — building explosive power through a shortened range of motion that mimics athletic movements like sprinting and jumping.
Research backs this up. A 2012 study published in the Journal of Strength and Conditioning Research found that training with quarter squats led to significant improvements in squat jump height and 40-yard sprint times compared to deeper squat variations (Hartmann et al., 2012). The mechanism is straightforward: the quarter squat trains the specific joint angles used during explosive athletic movements.
That said, the quarter squat is not a replacement for the full squat. It's a complement. If you only train quarter squats, you'll miss out on the deeper muscle activation and range-of-motion strength that full squats provide. Used strategically, though, the quarter squat fills a gap that deeper squats simply can't.
Quick Facts
| Movement Type | Compound (multi-joint) |
| Primary Muscles | Quadriceps |
| Secondary Muscles | Glutes, Calves, Core |
| Category | Strength — Lower Body |
| Equipment | Bodyweight (no equipment needed) |
| Difficulty | Intermediate |
| Knee Flexion | ~45 degrees (about one-quarter of full range) |
Step-by-Step: How to Do a Quarter Squat
- Set your stance. Stand with your feet shoulder-width apart, toes pointed slightly outward at about 15-30 degrees. Distribute your weight evenly across both feet. This is the same setup as a standard squat.
- Brace your core. Take a deep breath into your belly and engage your core muscles. Keep your chest up, shoulders back, and eyes forward. A strong brace matters even at shallow depths.
- Initiate the descent. Push your hips back slightly and bend your knees to lower yourself about 4-6 inches — roughly a 45-degree knee bend. Your torso should stay as upright as possible. Unlike a full squat, you won't need to hinge at the hips as much.
- Drive back up. Press through your midfoot and heels to return to standing. This is where the quarter squat differs most from other variations — focus on speed and explosiveness during the ascent. Squeeze your glutes at the top.
- Breathe with the movement. Inhale as you lower into the quarter squat. Exhale forcefully as you drive back up. Maintain your core brace throughout each rep.
Common Mistakes (And How to Fix Them)
Going Too Deep
What it looks like: Lowering past a 45-degree knee bend, turning the quarter squat into a half squat.
Why it's a problem: Defeats the purpose of the exercise. The quarter squat targets a specific joint angle range for power development. Going deeper shifts the training stimulus away from what makes this variation useful.
The fix: Film yourself from the side during your first few sets. Mark the depth with a box or bench behind you as a tactile cue — when your glutes barely graze it, you've gone far enough.
Collapsing the Knees Inward
What it looks like: Knees caving toward each other during the descent or the drive back up.
Why it's a problem: Places shearing stress on the knee ligaments and reduces power output. Even at shallow depths, valgus collapse can become a habit that carries over to deeper squat variations.
The fix: Actively push your knees outward over your toes. Think about "spreading the floor" with your feet. A light resistance band above the knees provides useful feedback.
Rising Onto the Toes
What it looks like: Heels lifting off the ground as you lower into the squat.
Why it's a problem: Shifts your center of gravity forward, reduces power through the posterior chain, and increases knee stress.
The fix: Focus on driving through your heels and midfoot. If your heels consistently lift, tight calves or limited ankle mobility are likely the culprit — add ankle mobility work to your warmup.
No Explosive Intent
What it looks like: Performing quarter squats slowly, like a traditional hypertrophy exercise.
Why it's a problem: The primary benefit of the quarter squat is explosive power development. Moving slowly misses the point entirely — you'd be better off doing full squats for slow, controlled reps.
The fix: Lower under control (1-2 seconds), then drive up as fast as you can. Think "controlled down, explosive up."
Get this exercise in a personalized workout
FitCraft's AI coach Ty programs quarter squats into plans built for your fitness level, equipment, and goals.
Take the Free Assessment Free • 2 minutes • No credit cardVariations
Easier (Regression)
- Wall-Assisted Quarter Squat. Stand with your back against a wall and slide down into the quarter squat position. The wall provides stability and helps you maintain an upright torso. Good for learning the depth cue before going freestanding.
- Bodyweight Full Squat (Slow Tempo). If explosive quarter squats feel uncontrolled, build your base with slow, full-depth bodyweight squats first. Master the full range of motion, then add the quarter squat as a power-focused variation.
Harder (Progression)
- Barbell Quarter Squat. Load a barbell on your upper traps and perform the quarter squat with added resistance. This is the classic version used for athletic power training. Start light and focus on explosive drive.
- Jump Squat. Lower into a quarter squat depth, then explode upward into a jump. This adds a plyometric component and trains peak power output. Only progress here if your quarter squat form is dialed in.
Alternative Exercises
- Box Squat. Sit back onto a box at your desired depth, pause briefly, then drive up. Teaches the hip-hinge pattern and lets you calibrate depth precisely.
- Wall Sit. An isometric hold at a partial squat depth. Builds quad endurance and time-under-tension without the explosive component.
Programming Tips
- Sets x Reps: Beginner: 3x8-10 (bodyweight) / Intermediate: 4x6-8 (bodyweight or light load) / Advanced: 4-5x3-5 (barbell, heavier load)
- Rest Period: 60-90 seconds for bodyweight, 2-3 minutes for loaded variations
- Frequency: 2-3 times per week, ideally on lower body or power-focused training days
- When in your workout: Early in the session, after your warmup. Power exercises like quarter squats perform best when you're fresh — doing them after heavy squats or lunges defeats the purpose.
FitCraft's AI coach Ty automatically programs quarter squats into your personalized plan based on your fitness level and goals. The app includes interactive 3D demonstrations so you can see exactly how deep to go and how fast to drive up — no guesswork about depth or tempo.
When to Use Quarter Squats (And When Not To)
The quarter squat is a tool, not a lifestyle. Here's when it makes sense and when it doesn't:
Use quarter squats when:
- You want to develop explosive power for sports like basketball, football, or track
- You're working around a knee or hip injury that limits squat depth
- You're adding variety to a leg program that already includes full-depth squats
- You want to train the specific joint angles used in sprinting and jumping
Skip quarter squats when:
- They're your only squat variation — you'll miss critical glute and hamstring development
- You haven't learned full squat mechanics yet — build the foundation first
- You're using them as an excuse to load more weight than you can handle safely
Frequently Asked Questions
What muscles do quarter squats work?
Quarter squats primarily target the quadriceps, with secondary engagement from the glutes and calves. Because the range of motion is shorter than a full squat, the quads handle most of the load while the glutes and hamstrings contribute less than they would at deeper depths.
Are quarter squats good for beginners?
Quarter squats can work for beginners who need a low-impact entry point, but they are not a substitute for learning full squat mechanics. They are better suited for intermediate athletes who already have solid squat form and want to train explosive power or work around joint limitations.
Do quarter squats build muscle?
Quarter squats build some quad strength but are less effective for overall muscle growth compared to full squats. Research shows that deeper squats activate more muscle across the glutes, hamstrings, and adductors. Quarter squats are best used for power development, not hypertrophy.
Are quarter squats bad for your knees?
Quarter squats actually place less stress on the knee joint than full squats because the knee flexion angle is smaller. They can be a good option for people managing knee issues or recovering from injury. However, using excessively heavy loads with poor form can still cause problems.
How are quarter squats different from regular squats?
A quarter squat lowers only about one-quarter of the way down, with roughly a 45-degree knee bend. A full squat lowers until the thighs are at least parallel to the floor. The shorter range of motion makes quarter squats better for explosive power, while full squats are superior for overall strength and muscle building.