Stiff-Legged Barbell Deadlift
The stiff-legged barbell deadlift pulls a bar from the floor the way a conventional deadlift does, but with your knees kept nearly straight the whole time, which shifts the demand almost entirely onto your hamstrings and lower back. It's a hamstring builder first and a general strength exercise second, trading some of the total weight you can lift for a much deeper stretch under load.
Why it works
Keeping your knees locked removes your quads from the lift, so your hamstrings have to do almost all the work of extending your hips back to standing. Because the bar starts on the floor rather than racked on your back, your hamstrings also get loaded through a longer range of motion than a good morning allows, stretching under tension at the bottom before contracting hard to pull you upright. That strength directly carries over to the bottom portion of a conventional deadlift, which is usually the sticking point most lifters struggle to break through.
Set up
- Stand with the bar over your mid-foot, feet about hip-width apart.
- Keep your knees only slightly bent, nowhere near the bend you'd use in a conventional deadlift.
- Grip the bar just outside your legs with your arms fully extended.
- Pull your shoulder blades back and brace your core before the bar leaves the floor.
How to do it
- Push your hips back as you lower into the starting position, keeping the bar close to your shins.
- Keep your spine in a neutral, flat line as you set your grip.
- Pull the bar up by driving your hips forward, keeping your knees locked throughout.
- Stand fully upright at the top, with your hips and knees both extended.
- Lower the bar back down by pushing your hips back first, keeping the bar close to your legs the entire way.
Form cues
- Keep the bar brushing close to your legs on both the way up and the way down.
- Send your hips back before you let your torso drop.
- Keep your lats engaged so the bar doesn't drift away from your body.
- Stop the descent the moment your lower back starts to round, even short of the floor.
Breathing: Take a full breath and brace your core before you hinge down, holding that brace until you've pulled the bar back to standing.
Common mistakes
Letting the knees bend more as the weight gets heavier.
Fix: Keep a fixed, slight knee bend throughout the lift; if you need to bend your knees more to move the weight, the load is too heavy for this exercise.
Rounding the lower back to reach the bar on the floor.
Fix: Stop the descent at the point where your back stays flat, even if that means the bar doesn't reach all the way to the floor yet.
Letting the bar drift forward away from your shins.
Fix: Keep the bar brushing your legs through the whole range, which keeps the load closer to your hips instead of your lower back.
Jerking the bar off the floor instead of pulling it with control.
Fix: Build tension in your hamstrings and back before the bar moves, then pull smoothly rather than yanking at the start.
How to program it
- This is a genuinely loaded barbell hip hinge, so default to once a week unless it's the only hamstring or posterior-chain work you're doing that week.
- 3 to 4 sets of 6 to 8 reps with a weight well below your conventional deadlift builds hamstring strength without needing maximal loads.
- Place it after your main deadlift or squat work in a session, since it's demanding on the hamstrings and works best as accessory volume.
- Prioritize range of motion and a flat back over the number on the bar; this exercise rewards control far more than raw load.
Safety notes
- Use noticeably less weight than you would on a conventional deadlift, since the locked knees remove your quads from sharing the load.
- Stop immediately if your lower back rounds under load rather than pushing through a rep with poor positioning.
- Build hamstring flexibility gradually; a tight hamstring that can't reach a flat-backed hinge position needs mobility work, not more load.
Exercise profile
- Force
- Pull
- Mechanics
- Compound
- Category
- Strength
Frequently asked questions
How much weight should I use on a stiff-legged deadlift?
Noticeably less than your conventional deadlift, since locking your knees removes your quads from the lift and shifts all the demand onto your hamstrings and lower back.
How many sets and reps work best?
3 to 4 sets of 6 to 8 reps, once a week, builds real hamstring strength without the fatigue of a near-maximal lift.
What's the difference between this and a Romanian deadlift?
A stiff-legged deadlift starts from the floor with locked knees, while a Romanian deadlift starts from standing with a slight, fixed knee bend and usually stops above the floor.
Can I do this with dumbbells instead?
Yes, the stiff-legged dumbbell deadlift trains the identical pattern and is a good way to learn the hinge before loading a barbell.
Why can't I reach the floor without rounding my back?
Tight hamstrings are the usual cause. Stop the bar at the lowest point where your back stays flat, and work on hamstring flexibility separately rather than forcing the range.
Is this exercise good for hamstring size as well as strength?
Yes, the long time under tension at a deep stretch is one of the more effective ways to add hamstring muscle, not just strength, when programmed with moderate reps and controlled tempo.