1-I don’t know a person what had suffered from RSI or SAD.
2-I work in the office and I know what I don’t sit down very well because sometimes I have pain in my back.
3-When the people buy the chair, what the chair is comfortable from they sit down in front of the computer very hours. Sit down correctly. Straight back, It’s necessary to move the legs.
4-Yes. The exercises are very useful and effective
5-No, I haven’t time