Ergonomic office chairs are best for blood circulation. However, long-term sitting in one position can affect your coccyx and back. Despite sitting in one place, one should keep the legs apart and back straight to keep the circulation going.
Further, the chairs with leg rest and working table attached make the working easy and comfortable.
Moreover, the office chairs with S-shaped and adjustable backrests serve best for spinal posture. In addition to that, chairs with leg rest and proper height adjustment knobs serve equally well for increasing blood circulation.