The best office chair for office work would be a chair that provides great support and is adjustable - so that you can manipulate it into the most ergonomic shape for your body.
A quality office chair is definitely a worthwhile investment because when you are comfortable, you can get more done. Uncomfortable office chairs can lead to health issues and inhibit people from doing their best.
Heavy users who weigh between 120 and 180 kilograms will get more mileage out of a heavy-duty office chair than a standard quality desk chair (which is generally only rated up to 120 kilograms).
The seat on heavy-duty chairs are broader and can adjust higher - plus, these chairs are reinforced and can handle more weight than other chairs.
If you are tall, you could also benefit from a heavy-duty chair as they can generally be adjusted for people who are 190 centimetres and taller.
With an average workday of 8 hours, we sit for about a third of every weekday. It is difficult for most to maintain a good posture for such a long time, so the best chair would be an ergonomic seating solution that gives your legs and back support at the right angles.
Ergonomics is the study of how items can be designed around the human physiology to improve efficiency.
When an office chair is described as ergonomic, it means that it was created to be the most comfortable chair, that gives you support in all the right places.
Adjust the height of your seat so that your feet are flat on the floor. Your knees should ideally be slightly lower than your hips. When you sit down, push your hips as far back as they can go in the chair. Make sure your upper and lower back are supported by the back of the chair - the best way to do this, is to ensure the back of the chair reclines at a 105° angle.
If you like to cross both legs, with your knees pointing out - you should get a chair that is specifically designed for cross-legged sitters. But you can also opt for a chair without armrests and a wider seat cushion that supports your legs while they are crossed.