Sitting

How to sit with good posture in a chair

By Gabi Moreno · 1 November 2026

It is mid afternoon, your lower back is nagging, and you catch yourself slumped over the keyboard again. You sit up tall, hold it for a minute, and slide right back down. If "sit up straight" actually worked, you would not be searching how to sit with good posture.

This guide gives you a chair setup you can do in under a minute, a version for the desk and a version for the couch, and the part almost every posture article skips: what to do with your body between sittings.

It is also honest about what sitting posture can and cannot do for your back, because the 2 things are not the same.

What good sitting posture actually is

Good posture is not a single rigid position you hold for 8 hours. It is a comfortable starting point that your body can stay in without effort, and that you leave often.

Here is the honest part. People search for bad sitting posture causes expecting slouching to be the villain, but the evidence does not back that up. Some people slouch all day and feel nothing. Some people sit very upright and hurt anyway.

What does build discomfort is staying in 1 shape for hours, whatever that shape is. Muscles that do not move get stiff, and stiff muscles complain. So the goal is not a perfect position. It is a relaxed position plus regular movement.

Your best sitting posture is your next one. Changing position often beats holding any single position perfectly.

How to sit with good posture on a chair, step by step

Do this once, slowly, with the chair you use most. After that it takes 10 seconds.

Slide your hips all the way back until they touch the backrest. Perching on the front edge is what pulls you into a slump.
Put your feet flat on the floor, about hip width apart. If they dangle, lower the chair or put a box under them.
Get your knees level with your hips, or slightly below. If your knees sit higher than your hips, the chair is too low.
Lean back a little and let the backrest carry some of your weight. Sitting is allowed to feel restful.
Keep your elbows close to your body, forearms roughly level with the desk or armrests.
Bring the screen up to eye height so your chin does not drop toward your chest.

The test is simple. If holding this position takes effort, something in the setup is off. Good sitting posture should feel like the easiest option in the room, not like a plank.

Sitting posture at work, at a desk and at home

Sitting posture at a desk

The chair steps above cover most of it. The extra piece at work is the screen. A laptop flat on the desk forces your head down for hours, so raise it on a stand or a stack of books and add a separate keyboard if you can.

If you cannot change the equipment, change the dose. Shorter stretches of laptop work, broken up with standing, beat a perfect setup you never leave.

Sitting posture at home

The couch is built for lounging, not for typing, and that is fine. Do not fight it. For watching TV, a cushion behind your lower back makes leaning back more comfortable. For working from the couch, put the laptop on a table instead of your lap when you can, and swap positions every time you notice yourself sinking.

There is no banned position. Crossed legs, feet tucked under you, deep couch slouch, all of it is fine in short doses. The problem is any position held too long.

The part that matters more than the position

You could sit in a flawless position for 3 hours straight and still stand up stiff. Your back likes movement more than it likes any posture, so the real habit to build is interrupting the sitting.

Aim to get out of the chair roughly every 45 minutes. It does not need to be a break. 20 seconds of standing already counts.

Stand for phone calls, or at least for the ones you take alone.
Use a glass, not a bottle, so refilling water forces you up.
Set a quiet timer for 45 minutes and stand when it goes off, even if you sit right back down.
Walk to a person instead of sending the message, when they are in the same place as you.

None of these need willpower once they are attached to things you already do. That is the point.

Sitting posture exercises and stretches you can do in the chair

If you were looking for a sitting posture workout, here it is. These are gentle moves that ease the stiffness sitting builds up, and you can do all of them without leaving the chair. The whole round takes about 5 minutes.

Upper back

Seated twist

: sit tall, put a hand on the opposite knee and rotate gently. Hold 20 seconds each side.

20 seconds

Neck

Chin glide

: slide your chin straight back, as if making a double chin, then release. 5 slow reps.

Shoulder rolls

: roll both shoulders up, back and down. 10 slow circles.

Chest

Chest opener

: hands behind your head, elbows wide, look slightly up and breathe. Hold 20 seconds.

20 seconds

Seated fold

: let your chest drop toward your thighs, arms hanging. Hold 20 seconds and roll back up slowly.

20 seconds

Stand and reach

: stand up, reach both arms overhead and stretch tall for a breath or 2.

Nothing here should hurt. Gentle means gentle. If a move feels sharp, make it smaller or skip it.

When this is not for you and it is time to see a healthcare professional. This guide is for everyday stiffness from sitting. It is not for you right now if the pain keeps you from sleeping, runs down a leg or an arm, comes with tingling or loss of strength, started after a blow or a fall, or has gone on for weeks without any change. Those signs are a reason to see a healthcare professional, not to adjust your chair.

What to do with what you have read

Do not try to hold a perfect position starting tomorrow. That plan fails by lunch. Do these 3 things instead.

Set up your chair once, following the 6 steps, so the easy position is also the comfortable one.
Pick 1 movement trigger, like standing for calls or the 45 minute timer, and run it for a week before adding another.
Do 5 minutes of gentle moves a day, from the list above, at whatever time you will actually do them.

Posture is the setup. Movement is what eases the discomfort. You need less of the first and more of the second than the internet told you.

If you would rather move than read

5 minutes a day for your back

BackPain gives you 5 minutes of gentle exercises a day, chosen by where it bothers you and what you are after. At home, no equipment, guided one at a time. If there are exercises you like more, build your own routines with them: the best exercise is the one you will actually do.

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Quick questions

how to sit with good posture

Slide your hips all the way back in the chair, put your feet flat on the floor, keep your knees level with your hips and let the backrest take some of your weight. Then forget perfection and change position often. A relaxed posture you leave regularly beats a rigid one you force.

does bad sitting posture cause back pain

The evidence does not support slouching as the cause. Some people slouch with no pain, and some sit very upright and hurt. What builds discomfort is staying in 1 position for hours without moving. Regular movement is what makes the difference, not a perfect shape.

what is the best sitting posture at a desk

Hips back against the backrest, feet flat, elbows close to your body with forearms level with the desk, and the screen raised to eye height. If you work on a laptop, lift it on a stand and add a separate keyboard. Then stand up roughly every 45 minutes.

are sitting posture exercises worth doing

Yes, as a way to ease the stiffness that builds during long sitting. Gentle moves like seated twists, shoulder rolls and chin glides take about 5 minutes and need no equipment. They work best as a daily habit, not as a one-off when your back is already complaining.

how often should I get up from my chair

Roughly every 45 minutes is a good rhythm to aim for. The break can be tiny, 20 seconds of standing or a walk to refill a glass of water already counts. Attaching it to things you do anyway, like calls, works better than relying on willpower.

is sitting with crossed legs bad for you

Not in short doses. No single sitting position is banned, including crossed legs or feet tucked under you. The issue is holding any 1 position for a long time, so cross them, uncross them, and keep changing.

BackPain is a wellness app, not a medical device. This guide is general information and is no substitute for a healthcare professional. It does not diagnose, treat, cure or prevent any condition. If your pain persists, see a healthcare professional.