What is good posture?

Posture is the position your body takes while you sit, stand, walk and work, and it changes all the time. Good posture is not one perfect position. Healthy spines vary a lot in shape, no single posture has been shown to prevent pain, and the spine is built to move and load in many positions. A better definition of good posture is one you can hold comfortably and leave easily, with plenty of movement through the day.

What posture is

Posture describes where the head, trunk, pelvis and limbs sit relative to each other and to gravity. It is shaped by the task, the chair or surface, your strength and endurance, your eyesight, how tired you are and how you feel. That is why it is better thought of as a pattern over a day than as a single snapshot.

Clinicians describe common patterns with names such as forward head posture, rounded shoulders, flat back and sway back. These are descriptions, not diagnoses.

Is there a perfect posture?

No. A 2019 review of the evidence on posture and back pain set out four points:¹

1. There is no strong evidence that one optimal posture exists, or that avoiding “incorrect” postures prevents back pain.
2. Spinal curves vary naturally between people, and no single curvature is strongly associated with pain.
3. Posture can reflect emotions and beliefs, and some postures are protective responses to pain or worry.
4. The spine is robust and adaptable, and safe to move and load in many positions.

A 2023 review of spinal posture assessment adds that small asymmetries are normal and that the methods used to measure posture still lack a standard approach.²

The idea that you should sit bolt upright all day is an old piece of advice that the evidence does not support.

Then what is good posture?

A practical definition:

• Comfortable: you can hold it without strain.
• Changeable: you move out of it often, and easily.
• Supported: your setup does not pull you forward for hours.
• Strong enough: you have the endurance to sit or stand tall when you want to, without effort.

Long bouts in any one position, slumped or upright, build discomfort. Office workers who stood up during a two hour session kept moving more and felt less discomfort than those who stayed seated.³ That is why posture variability is a better goal than perfect posture.

Does posture cause pain?

The links are weaker than most people assume. In adults, a forward head is associated with somewhat more neck pain, but studies are mostly snapshots and age changes the picture. The detail is in posture and pain: what the reviews say.

How to improve your posture

The practical plan, with sources, is in how to improve your posture: move often, train strength and endurance, set up your screens, and use feedback to learn when your posture slips.

Footnotes

1. “Sit Up Straight”: time to re-evaluate. 2019. ↩

2. Spinal posture assessment and low back pain. 2023. ↩

3. Postural strategies among office workers during a prolonged sitting bout. 2022. ↩