An ergonomic chair is one that will support your spine, your own body, and your individual needs where you need it most. Ergonomic chairs are the type that will provide your body the circulation it requires, without interfering with the size of your body, or the flow of blood in the human body. You may check this link to get more info about Ergonomics Chair.
Ergonomic seats are what you really need if you're sitting still for over three hours at a time. Sitting down before the video game, at your desk or whether you work where you're sitting all the time that it can be hard on your body, leading to aches and pains even though you are working and after you get out of work to the day.
Your toes should not be dangling off your seat. If you find that your leg legs are too short to get a seat, you want to correct the height amounts of your chair. The height amounts of your seat should also be corrected if you feel your legs are too long and your legs are scrunched up when you sit down.
A chair which will lift up and down is a good start to finding the seat which will fit your specific personal body needs. The ergonomic chair is one that will provide your body support while not damaging circulation at exactly the same time.