There is not one perfect posture. Change your posture frequently. Look around your office. There are probably very few people sitting up perfectly straight.
There are a couple of simple things you can do to create different ergonomic sitting positions:
- Check your chair and see if the back rest or chair can go into a ‘floating mode’. Typically this is done by adjusting a tension adjustment knob located underneath the front of the chair or a “back lock” lever on the side (Ohhh!!! So that is what it’s for!)
- Even if you can’t do this, change your chair adjustments throughout the day, stand up when you can, or even occasionally sit forward on your chair.