Squats vs Leg Press: Which Is Better for Building Legs?

The Short Answer

Anyone who tells you leg press is “just as good” as squats is either selling leg press machines or hasn’t squatted properly. Squats are the king of lower body exercises and it’s not particularly close. That said, leg press has a genuine role — it’s a solid way to hammer your quads without loading your spine, and it’s perfect after squats when your back is fried. But if you can only do one, squat.

Muscles Worked

Muscle Group	Barbell Back Squat	Leg Press
Quadriceps	Primary	Primary
Glutes	Primary	Secondary
Hamstrings	Secondary	Low
Core / Erectors	High	Minimal
Adductors	Moderate	Moderate
Calves	Low	Low

The squat is a true compound movement that demands stability from your core, upper back, and even your ankles. The leg press removes most of that stability requirement, letting you focus purely on pushing with your legs.

Technique

Barbell Back Squat

1. Set the bar across your upper traps (high bar) or rear delts (low bar)
2. Stand with feet roughly shoulder-width apart, toes slightly turned out
3. Brace your core hard — take a deep breath and push your abs out
4. Break at the hips and knees simultaneously, sitting down and back
5. Descend until your hip crease is at or below your knee (parallel or deeper)
6. Drive through your whole foot to stand back up, squeezing your glutes at the top
7. Keep your chest up and avoid letting your knees cave inward

Leg Press

1. Sit in the machine with your back flat against the pad
2. Place your feet shoulder-width apart on the platform — higher placement hits more glutes, lower hits more quads
3. Release the safety handles and lower the platform under control
4. Descend until your knees are at roughly 90 degrees — don’t let your lower back round off the pad
5. Press through your whole foot back to the starting position
6. Don’t lock your knees completely at the top

Pros and Cons

Barbell Back Squat

Pros:

• Trains the entire posterior chain plus your core
• Best exercise for building functional, total-body strength
• Enormous progressive overload potential
• Directly improves athletic performance and daily movement

Cons:

• Technically demanding — takes time to learn proper form
• Requires adequate ankle and hip mobility
• Places significant load on the spine
• Needs a squat rack and ideally a spotter for heavy work

Leg Press

Pros:

• Easier to learn and execute safely
• No spinal loading — great for people with back issues
• Allows very heavy loads for quad-focused hypertrophy
• Easy to push close to failure without a spotter

Cons:

• Doesn’t train core or stabiliser muscles
• Less carryover to real-world movements
• Easy to ego-load and use too much weight with partial reps
• Fixed machine path doesn’t suit all body types

When to Use Each

Use squats when:

• You want to build total-body strength and athleticism
• You’re training for a sport or functional fitness
• You want the most bang for your buck in a time-limited session
• You’re tracking your estimated 1RM over time

Use leg press when:

• You have a back injury or spinal issue that prevents squatting
• You want to add extra quad volume after squats
• You’re training to failure and want a safer option
• You’re a beginner building confidence before moving to free weights

Use both when:

• You squat heavy early in your session, then leg press for higher-rep hypertrophy work
• You want to maximise leg development from multiple angles

The Verdict

Squats first, always. No other leg exercise comes close for building total-body strength and functional muscle. Leg press earns its spot as a finisher — once your squats have torched your back and core, leg press lets you keep pushing your quads without worrying about form breakdown. Programme squats as your main lift, leg press as your follow-up, and ignore anyone loading 8 plates per side on the leg press with 4 inches of range of motion.

Track both exercises and swap between them in PT Tracker.