Smith Machine Hip Thrust: How to Set Up and Do It Properly

A Smith machine hip thrust is a hip thrust where the bar runs on the machine's fixed rails instead of rolling free, and it's one of the easiest ways to load your glutes heavily without a spotter or a fiddly barbell setup. You sit on the floor with your upper back on a bench, the Smith bar across your hips, and drive your hips up until your body forms a straight line from knees to shoulders. The rails take care of balance and the hooks let you rack the bar at any point. The catch is that the bar only moves straight up and down while your hips move in a slight arc, so the setup matters more than with a free bar. Get the bench in the right spot and it's a brilliant glute builder.

Muscles worked

Your gluteus maximus does most of the work. In a hip thrust it's under the most tension right at the top, when your hips are fully extended, which is the opposite of a squat where the glutes work hardest near the bottom.

That difference shows up in the research. In a study of 13 trained women lifting estimated 10-rep maximums, the barbell hip thrust produced roughly twice the mean upper and lower glute EMG activity of the back squat, while quad (vastus lateralis) activity was similar between the two (Contreras et al., 2015). A later systematic review reached a similar conclusion on glute activation, though it pointed out that EMG readings don't automatically translate into bigger strength or size gains (Neto et al., 2019). Those studies used a free barbell; nobody has properly tested the Smith version head to head, but the joint action is the same.

The supporting cast:

• Hamstrings. They help extend the hip, and they work harder if your feet sit further from the bench.
• Quads. They hold your knees at roughly 90 degrees at the top. Bring your feet closer and you'll feel them more.
• Adductors and glute medius. Pushing your knees slightly outwards keeps both switched on and stops your knees caving.
• Core. Your abs keep your ribs down so the movement comes from your hips, not your lower back.

How to set up a Smith machine hip thrust

Setup takes a couple of minutes the first time. After that you'll remember your numbers (bench position, stop height) and be ready in seconds.

1. Place the bench. Put a flat bench side-on, behind the Smith bar, parallel to it. Most flat benches stand around 40cm to 45cm high, which suits most people. Very tall lifters may want something slightly higher; shorter lifters sometimes prefer a step or low box.
2. Set the safety stops. Sit on the floor with your upper back against the bench and set the stops so the bar can't drop below hip height in that seated position. On many home machines the stops are the part that limits you, so check this before you load plates.
3. Pad the bar. Wrap a thick barbell pad around the middle of the bar. Smith bars are usually standard diameter, so a normal squat or hip thrust pad fits.
4. Get under the bar. Sit down, slide your legs under, and roll the bar until it sits in your hip crease, just below your hip bones. Rest the bottom edge of your shoulder blades on the bench edge.
5. Place your feet. Feet flat, roughly hip-width apart, toes turned out a touch. At the top of the rep your shins should be close to vertical, so you may need to shuffle once or twice.
6. Find the bench-to-bar position. Here's the bit that matters on a Smith: drive up once with an empty bar. If the bar slides towards your stomach at the top, move the bench back a few centimetres. If it rolls towards your thighs, move it forward. You want the bar sitting in your hip crease at full lockout, because that's where the load is heaviest.
7. Unrack. Grip the bar just outside your hips, push up a few centimetres, then rotate the bar to free the hooks. Lower under control.
8. Rack. Finish the last rep at the top, rotate the bar back onto the nearest hook, and slide out.

Some Smith machines have rails angled at around 7 degrees rather than dead vertical. If yours does, try facing both ways with an empty bar and keep the direction where the bar stays in your hip crease through the whole rep.

How to do the rep

Start with your hips a few centimetres off the floor and the bar resting on your hips. Tuck your chin slightly and look forward, not at the ceiling; your gaze should follow your torso as it rises. Brace your abs, then push through your heels and drive your hips up until your thighs and torso form a straight line. Squeeze your glutes hard for one second at the top, then lower under control until your bum hovers just above the floor (or the bar touches the stops).

Smith machine vs barbell hip thrust

The Smith version wins on convenience. You don't need to wrestle a loaded barbell over your legs, and the rails stop the bar rolling or tipping sideways, which matters when you're pushing a heavy set. Bailing out is simple too: rotate the bar onto a hook, or let it settle on the stops. For anyone training alone, that alone makes it worth using.

Loading is easier on the knees and shins as well. On a free barbell you have to roll the bar over your thighs; on a Smith you can set the stops at hip height and just slide underneath.

But it isn't free of compromises. Your hips don't travel straight up during a hip thrust; they follow a slight arc as your torso pivots around the bench. A free bar follows that arc. A Smith bar can't, so if the bench is in the wrong place the bar either drifts up your stomach or slides onto your thighs at the top. Bench placement (step 6 above) fixes most of this, but some people simply find the free bar more comfortable. There's also no requirement to stabilise the bar, which reduces the work for small stabilising muscles. Research comparing free weight and Smith machine squats found higher overall muscle activity in the free weight version (Schwanbeck et al., 2009); it's reasonable to expect a similar pattern here, although nobody has measured it for hip thrusts.

My take: if your goal is bigger, stronger glutes, use whichever one you'll do consistently and progress on. For many home gym owners with a Smith machine already, that's the Smith.

Common mistakes

Bar in the wrong spot at lockout. Covered above, but it's the number one problem. Fix the bench position with an empty bar before you load anything.

Arching instead of extending. If your lower back is doing the lifting, you'll feel it there rather than in your glutes. Keep your ribs down and finish with a slight pelvic tuck.

Feet too far forward or too close. Feet too far out shifts the work onto your hamstrings (and sometimes causes cramping). Too close and your quads take over. Aim for vertical shins at the top.

Craning your neck. Staring at the ceiling makes it harder to keep your ribs down. Keep your chin slightly tucked and let your head move with your torso.

Rushing the lockout. The top is where the glutes work hardest. A one-second pause there makes a lighter weight far more effective than bouncing through quick reps.

No pad. It sounds minor until you've done 3 sets with 60kg on your hip bones. Bruising will cut a session short.

Variations

Once the standard version feels solid, these keep things progressing.

• Single-leg Smith hip thrust. Lift one foot off the floor and drive through the other. Use a light load (often just the bar). It's a great way to find and fix a weaker side.
• B-stance hip thrust. Keep both feet down but move one foot slightly forward with only the heel touching. The back leg does most of the work, so you get a single-leg effect with better balance.
• Pause reps. Hold the top for 3 seconds on every rep. Brilliant for learning the lockout and for training when you don't have heavier plates.
• Banded Smith hip thrust. Loop a mini band just above your knees and push your knees out against it throughout. It keeps your glute medius working and stops your knees caving.
• Dead-stop reps. Lower the bar onto the safety stops between every rep and restart from a dead stop. This removes momentum and is easy to set up on a Smith.

If you want more ideas for working the same muscles, have a look at the hip thrust alternatives guide.

Sets and reps

The hip thrust responds well to a range of rep schemes. A simple starting plan:

• Strength: 4 sets of 6 to 8 reps, resting 2 to 3 minutes.
• Muscle building: 3 to 4 sets of 8 to 12 reps with a one-second squeeze, resting about 90 seconds.
• Finisher or pump work: 2 to 3 sets of 15 to 20 with a lighter load or a band.

Do it once or twice a week, alongside a squat or lunge pattern. The NHS recommends muscle-strengthening work for all major muscle groups on at least two days a week, and pairing a hip thrust with a Smith machine squat covers the lower body nicely. Add 5kg to 10kg once you hit the top of your rep range with clean form. And because Smith bar weights vary a lot (see our guide to Smith machine bar weight), keep tracking on the same machine.

Check price: DMoose hip thrust barbell pad

If you're thinking about a Smith machine for home, our round-up of the best Smith machines in the UK covers what's worth buying, and our Marcy MD9010 review looks at one of the more popular home options in detail.

Recommended reads

1. Hip thrust: how to do it and muscles worked
2. The best hip thrust alternatives
3. Smith machine squat: technique and benefits
4. The best Smith machines in the UK
5. Marcy MD9010 Smith machine review