How to Sit With Good Posture Without Feeling Stiff
Good sitting posture gives you a useful starting position, then leaves room to move. It should not feel like a pose you have to defend.
Let your feet and seat do some of the work
Place both feet on the floor or on a footrest, and let the chair support your hips and back. Keep your knees roughly level with or slightly below your hips if that feels comfortable. You should be able to shift your weight without sliding forward or gripping the chair.
A good starting position is one you can leave easily. If you need to brace your stomach, pull your shoulders back, or hold your head in place, the setup is asking too much of you.
Keep your work close
Bring the screen, keyboard, and mouse close enough that you do not have to reach or lean toward them. Put the monitor in front of you rather than at an angle that keeps your head turned. These small changes reduce the number of times you have to chase your work with your body.
OSHA describes neutral positions as a way to reduce awkward reach and twist. It does not mean staying still. Change your position throughout the day.
Use movement as part of sitting well
Stand up, walk a few steps, or stretch your arms before you feel locked into the chair. A short reset can be tied to a meeting ending, a glass of water, or a new work block. The cue matters because sitting posture usually drifts when attention moves elsewhere.
If you want a guided version, Uncurled turns short posture exercises into repeatable sessions with reminders. The aim is to make movement easier to remember, not to police your position.
When sitting feels painful
General posture advice cannot explain every symptom. Stop if movement causes pain, dizziness, numbness, or unusual discomfort. If the problem keeps returning or you have an injury, ask a qualified healthcare professional for individual guidance.