rsi or sad

1.- No, I don't know anybody with RSI or SAD.
2.- No, I I don’t sit correctly when I use a computer. I have pain in my back and in the neck.
3.- Sit correctly while you work
4.- Yes, they are very useful
5.- No, I don´t
2.- No, I I don’t sit correctly when I use a computer. I have pain in my back and in the neck.
3.- Sit correctly while you work
4.- Yes, they are very useful
5.- No, I don´t