A kneeling chair is what you need if you have to pass a lot of time in your office.Unfortunately this type of chairs is quite expensive and not very common. This is one reason to make your own kneeling chair, which will also make you very proud.
Variable balans kneeling chair by Varier | Ergo Depot
Vintage Balans Variable Ergonomic Danish Modern Chair
Stokke Balans - Danish modern ergonomic chair.
A portable stool that settles you into a relaxed, healthy posture for meditation and low seating.
This ergonomic chair with unique geometry keeps your back straight while you are working and improves concentration and productivity.