There are a ton of ergonomic chairs on the market and simply saying it’s ergonomic does not necessarily mean it will be. In fact, a better way to discern if the chair is ergonomic is if it’s referenced as a ‘task chair’. That term indicates that it has certain adjustability features to adjust it to fit the user.
For more information on ergonomic task chairs and a starting point for looking at some options on the market that may be right for you, please see the article below.
If you’re thinking about alternative type chairs, such as the ‘ball chair’, you’ll find the following article enlightening about how this options stacks up against an ergonomic task chair.