Stiff leg deadlifts

What makes stiff leg deadlifts different

Stiff leg deadlifts are a specific variation of the loaded hip hinge. The defining features differentiate them from Romanian deadlifts and conventional deadlifts.

The defining feature

Straight or nearly straight knees throughout the movement. Some coaches allow a very slight knee bend. Others insist on locked knees. Either approach is acceptable. The point is the knees do not actively contribute to the movement the way they do in Romanian deadlifts (slight bend) or conventional deadlifts (significant bend).

The range of motion

Stiff leg deadlifts typically go lower than Romanian deadlifts. The bar usually travels to mid shin or lower rather than stopping at knee height. The deeper range is possible because the straighter knees allow a fuller hamstring stretch. Some lifters lower until the plates touch the floor between each rep.

The loading pattern

The straight knees and deeper range produce particularly strong loading of the upper hamstrings near the attachment to the pelvis. The lower back also works harder than in Romanian deadlifts because of the increased lever arm. The stress on the lower back is one reason stiff leg deadlifts are less commonly recommended than Romanian deadlifts.

When to use them

For variety from Romanian deadlifts and conventional deadlifts. For lifters who want to emphasise the upper hamstring stretch. For experienced lifters with good back health. Not generally recommended for beginners or anyone with lower back issues. Romanian deadlifts cover most of the same training purposes with less back demand.

The technique

Stiff leg deadlift technique builds on the basic hinge pattern but with specific differences from Romanian deadlifts.

The starting position

Stand with the barbell on the floor or at standing height in a rack. Feet hip width apart. Grip width slightly outside the shoulders. For a floor start, hinge down with straight knees to grip the bar. Stand fully upright with the bar held at thigh height. Chest up. Knees straight or with minimal bend.

The descent

Push your hips back as you let the bar travel down close to your legs. Keep the back flat throughout. Knees stay straight or nearly so. The bar should travel down close to your legs, essentially brushing against them. Continue until the bar reaches mid shin or lower depending on your flexibility.

The ascent

Drive your hips forward to reverse the movement. The bar travels back up close to your legs. The knees stay straight throughout. Stand fully upright with a squeeze of the glutes. Avoid hyperextending or leaning backward.

Tempo and breathing

Lower over 2 to 3 seconds. Brief pause at the bottom. Drive up over 1 to 2 seconds. Take a breath at the top of each rep, brace, hold through the descent and rise, breathe out at the top. The bracing matters more than in many exercises because of the back demands.

What goes wrong

Stiff leg deadlifts have specific common errors that limit results or increase injury risk.

Rounding the lower back

The most dangerous error. The straight knees and deep range combine to demand significant flexibility. Lifters who go beyond their current range round their back. This puts unnecessary stress on the lower back. Range should be limited to what you can achieve with a flat back. Build the range gradually.

Bending the knees too much

Bending the knees turns this into a Romanian deadlift or even a conventional deadlift. The exercise loses its specific stimulus. The knees should stay essentially straight throughout. If you need to bend the knees significantly to hit depth, you are not flexible enough for stiff leg deadlifts yet. Work on Romanian deadlifts instead.

Bar drifting forward

The bar should travel close to your legs throughout. Letting it drift forward changes the loading pattern significantly and stresses the lower back further. Keep the bar essentially brushing your legs. Engage the lats to pull the bar toward your body if it drifts.

Going too heavy

Stiff leg deadlifts have inherently higher injury risk than Romanian deadlifts because of the back demands. Going heavy makes the risk higher. Use weights significantly lighter than your Romanian deadlift. Quality of movement and the hamstring stretch matter more than the load.

How to use them

Stiff leg deadlifts work best as a variation rather than a primary exercise. The application depends on your training context.

As an accessory exercise

Three sets of 8 to 12 reps with moderate weight as accessory work after compound hamstring exercises. The volume should be lower than for Romanian deadlifts because of the increased back demand. Once a week is enough. The exercise adds variety without replacing the primary hamstring work.

For hypertrophy

Three sets of 10 to 15 reps with moderate weight and slow eccentrics. The deeper range and upper hamstring stretch produce useful hypertrophy stimulus. Some lifters prefer stiff leg deadlifts for this specific stimulus. Most stick with Romanian deadlifts as the primary tool.

In rotation with other hinges

Some programmes rotate between Romanian deadlifts, stiff leg deadlifts and conventional deadlifts across training cycles. Each variation provides slightly different stimulus. This rotation can prevent staleness and produce ongoing progress. The total volume of hinge work matters more than which specific variation you use.

Not for beginners

Beginners should learn Romanian deadlifts first. The slight knee bend and shorter range make Romanian deadlifts easier to perform with good form. Stiff leg deadlifts should come later, once the hinge pattern is solid and lower back conditioning is good. Building up to them takes months or years of foundation work.

More hamstring exercises

For the more common variation, our Romanian deadlifts covers the primary hinge exercise. Dumbbell Romanian deadlifts covers the dumbbell alternative. And Hip hinges covers the underlying pattern.