A rocking chair or good armchair will make sitting more comfortable.
The seat must be at the proper height so that your thighs rest comfortably when your feet are flat on the floor. It should be deep enough to support the length of your thighs but shallow enough to let your upper and lower back rest against the back of the chair.
The back should be high enough to support your shoulders. It is even better if it can support your head.
The armrests should be at the right height so that you can rest your arms comfortably when you are sitting straight.
If you do not have a comfortable rocking chair or armchair, you can make any chair more comfortable by using a pillow, footrests, or footstools for support.
Here are a few tips to adopt a good sitting position.