Smith Machine Hip Thrust: How to Set Up and Do It Properly
How to do a Smith machine hip thrust: bench height, bar pad, foot position and safety stops, the muscles worked, mistakes to fix, variations and sets and reps.
By Mike Shilling, Recovery & Training Editor · Updated 24 July 2026
The Superman is a floor exercise named for the pose it puts you in: lying face down, arms stretched out in front, then lifting your arms, chest and legs off the ground like you're flying. It strengthens the muscles running down the back of your spine along with your glutes, and it does it with nothing but a bit of floor space. Most people spend their days rounded forward over a desk or a phone, so a move that trains the opposite pattern, extending and holding the back, earns its keep. Here's how to do it well, what it works, and how to make it easier or harder to suit you.
All you need is a soft surface. A carpet, a folded towel or a yoga mat keeps your hip bones comfortable.
Lift long, not high
The instinct is to yank everything up as far as it will go, which crunches your lower back and strains your neck. Don't. Imagine someone gently pulling your fingertips forward and your toes backward, lengthening your body as you lift. A small, long, controlled rise works the muscles far better and keeps your spine happy. If your lower back pinches, you're lifting too high.
The Superman trains the whole posterior chain in a straight line, top to bottom.
To round out your core alongside this, train the front and sides too with a plank and a dead bug, so you're not only strengthening one direction.
Lifting too high. Hyperextending into a deep backbend pinches the lower spine and does nothing extra for the muscles. Keep the arc shallow and long.
Cranking your neck. Craning your head up to look forward strains your neck. Keep your gaze on the floor so your head follows the line of your spine.
Forgetting the glutes. If you lift purely with your lower back and leave your glutes slack, you dump all the load onto your spine. Squeeze your bum on every rep.
Bouncing off the floor. Slamming down and rebounding uses momentum instead of muscle. Lower under control, pause, then lift.
Holding your breath. People tend to lock up and stop breathing. Exhale as you lift, breathe steadily through the hold.
Once you've got the basic Superman, or if the full version is too much to start, these give you an easier on-ramp and a harder finish.
When floor extensions feel too easy across the board, step up to a full back extension on a bench or Roman chair for a bigger range and the option to add weight.
A simple, back-friendly plan:
Rest 45 to 60 seconds between sets. Add reps, a longer hold, or light load once your form stays clean and pain-free throughout every set. Slow and steady wins with back work, so resist the urge to pile on volume.
The Superman mainly works your erector spinae, the muscles running either side of your spine that extend your back, along with your glutes and hamstrings which lift your legs. Your rear shoulders and upper back help raise your arms, and your deep core muscles fire to stabilise you. It is a back-of-the-body exercise that needs no equipment and no weight.
For most people, yes. It strengthens the back extensor muscles that hold you upright, and weak, deconditioned back extensors are strongly linked with lower back pain. Building their endurance is one of the more reliable ways to support the spine. If you have an existing back injury or acute pain, check with a physio first, because some conditions do not respond well to repeated back extension.
Hold each rep at the top for 2 to 5 seconds, squeezing your glutes and back, then lower under control. Endurance matters more than a marathon single hold, so a set of controlled reps with short holds beats one shaky 30-second attempt. If you prefer timed holds, work up to 3 sets of 20 to 30 seconds with good form rather than sagging.
Usually because you are cranking your lower back too hard and lifting too high, hinging at the spine instead of using a smooth, moderate extension. Lift only as far as your glutes and back can raise you without pinching, keep your neck long and your gaze down, and squeeze your glutes to share the load. If it still hurts, drop to a gentler variation like alternating limbs or the bird dog.
Both train the same back extensor muscles. The Superman is done face down on the floor with no kit, lifting your arms and legs off the ground. A back extension, or hyperextension, is done on a bench or Roman chair where your upper body hangs off the edge and you extend up against gravity through a bigger range. The Superman is the easier, more accessible starting point.
Yes, it is one of the most beginner-friendly back exercises because you control exactly how high you lift and there is no weight or machine involved. Start by raising just your arms, or just your legs, or lift opposite arm and leg at a time. Once that feels easy and pain-free, progress to lifting all four limbs together in the full Superman.
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