Stiff-Leg Deadlift: Target Your Hamstrings with This Hinge Variation

The stiff-leg deadlift (SLDL) keeps your legs straighter than a conventional deadlift or Romanian deadlift, putting maximum stretch on your hamstrings. It's a classic bodybuilding exercise for building hamstring size and improving hip hinge mechanics.

Often confused with the Romanian deadlift, the stiff-leg deadlift has distinct differences that change the muscle emphasis and stretch.

Stiff-Leg Deadlift vs Romanian Deadlift

These are often used interchangeably, but they're different:

| Aspect | Stiff-Leg Deadlift | Romanian Deadlift | |--------|-------------------|-------------------| | Knee bend | Minimal (nearly straight) | Slight (15-20°) | | Bar path | Descends in front of legs | Stays close to legs | | Range of motion | Usually to floor or near it | Stops at mid-shin typically | | Hamstring stretch | Maximum | High | | Lower back demand | Higher | Moderate | | Starting position | Floor or hang | Hang (unrack or deadlift up first) |

The key difference: Stiff-leg = straighter legs, bar drifts slightly forward. RDL = slight knee bend, bar drags along legs.

Stiff-Leg Deadlift Technique

Setup (From Floor)

1. Stand with feet hip-width apart
2. Bar over mid-foot
3. Hinge at hips to grip the bar
4. Keep legs nearly straight (soft knees, not locked)
5. Back flat, chest up
6. Grip just outside legs

The Lift

1. Drive through the floor, extending hips
2. Keep legs straight throughout
3. Bar travels slightly in front of legs (not dragging against them)
4. Stand tall at the top, squeeze glutes
5. Shoulders back, hips fully extended

The Descent

1. Push hips back, initiating the hinge
2. Keep legs straight (minimal knee bend)
3. Lower bar toward the floor
4. Go as low as flexibility allows without rounding
5. Feel the deep hamstring stretch
6. Reverse and repeat

Key Points

| Point | Why It Matters | |-------|---------------| | Legs stay straight | Maximizes hamstring stretch | | Hips push back | Proper hinge pattern | | Back stays flat | Protects spine, keeps tension on hamstrings | | Bar path slightly forward | Natural path with straight legs | | Go to full stretch | Where the stimulus happens |

Common Mistakes

Rounding the Lower Back

The problem: Losing spinal neutrality to get more range of motion.

The fix: Only go as low as you can with a flat back. Flexibility improves over time.

Bending the Knees Too Much

The problem: Turns into a Romanian deadlift or conventional deadlift.

The fix: Keep a soft knee but minimal bend. Legs should look nearly straight.

Pulling with the Arms

The problem: Using arms instead of hip extension.

The fix: Arms are hooks. The lift comes from hip extension and hamstring/glute contraction.

Not Going Low Enough

The problem: Stopping early, missing the stretch.

The fix: With good form, go until you feel a full hamstring stretch. This might be mid-shin or lower depending on flexibility.

Going Too Heavy

The problem: Form breaks down, lower back takes over.

The fix: Stiff-leg deadlifts aren't for ego lifting. Use moderate weight and focus on the stretch.

Benefits of Stiff-Leg Deadlifts

Maximum Hamstring Stretch

The straight-leg position puts hamstrings in their most lengthened state under load. This stretched position is powerful for muscle growth.

Hip Hinge Practice

Reinforces the hip hinge pattern with minimal knee movement — pure hip extension.

Posterior Chain Development

Targets hamstrings primarily, with significant glute and lower back involvement.

Flexibility Improvement

Regular practice increases hamstring flexibility over time.

Deadlift Carryover

Strengthens the hip extension pattern that applies to conventional and sumo deadlifts.

Programming Stiff-Leg Deadlifts

For Hypertrophy

• 3-4 sets of 10-15 reps
• Moderate weight
• Control the descent (2-3 seconds)
• Full stretch at the bottom

For Strength

• 3-4 sets of 6-8 reps
• Heavier weight (still controlled)
• Full range of motion

Placement in Workout

On Leg Day:

1. Squat: 4x6
2. Leg Press: 3x12
3. Stiff-Leg Deadlift: 3x12
4. Leg Curl: 3x15

On Pull/Back Day:

1. Deadlift: 4x5
2. Barbell Row: 4x8
3. Stiff-Leg Deadlift: 3x10
4. Pull-ups: 3x8

As Primary Hamstring Movement:

1. Stiff-Leg Deadlift: 4x10
2. Leg Curl: 3x12
3. Glute-Ham Raise: 3x10

Frequency

• 1-2x per week
• Can alternate with RDLs for variety
• Complement with knee flexion work (leg curls)

Stiff-Leg Deadlift Variations

Dumbbell Stiff-Leg Deadlift

Dumbbells at your sides. Allows more freedom of movement and can feel more natural for some.

Single-Leg Stiff-Leg Deadlift

Massive balance challenge plus unilateral hamstring work. Great for addressing imbalances.

Deficit Stiff-Leg Deadlift

Stand on a plate or platform. Increases range of motion for those with good flexibility.

Banded Stiff-Leg Deadlift

Band around feet and shoulders. Adds accommodating resistance (harder at top).

Snatch-Grip Stiff-Leg Deadlift

Wide grip increases range of motion and upper back demand.

Who Should Do Stiff-Leg Deadlifts

Great For:

• Those wanting hamstring hypertrophy
• Lifters with tight hamstrings (improves flexibility)
• Anyone wanting a deeper stretch than RDLs provide
• Bodybuilders targeting hamstrings specifically

Approach Carefully:

• Those with lower back issues (the forward bar path increases back demands)
• Complete beginners (learn RDL first)
• Those with very tight hamstrings (build flexibility gradually)

May Prefer RDLs Instead:

• Those with lower back sensitivity
• Lifters wanting more glute emphasis
• Anyone uncomfortable with the forward bar path

Stiff-Leg vs RDL: Which to Choose?

Choose Stiff-Leg When:

• You want maximum hamstring stretch
• Your flexibility can handle the range
• Your lower back is healthy and strong

Choose RDL When:

• You want slightly more glute emphasis
• You prefer keeping the bar closer to your body
• You have lower back concerns

Best Approach: Use both, alternating through training phases. They're similar enough to be interchangeable but different enough to provide variety.

The Bottom Line

The stiff-leg deadlift maximizes hamstring stretch by keeping your legs nearly straight. It's a classic mass-builder that also improves flexibility and reinforces the hip hinge pattern.

Use moderate weight, focus on the stretch, and maintain a flat back. Don't let ego push you into range of motion your flexibility can't support with good form.

Add it to your hamstring training rotation alongside leg curls and RDLs for complete development.

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Related:

• Romanian Deadlift Guide
• Hamstring Exercises Guide
• Hip Hinge Guide