All office chairs should be adjustable to suit the shape and size of their user. If your office chair is not adjustable, you should speak to the person in your company who is responsible for the procurement of office furniture. There is a wide range of adjustable office chairs available from online furniture retailers such as www.fashionforhome.co.uk. The benefit from having one of these designer chairs can be twofold; you get to sit in a comfortable seat that you can adapt to fit your body and the stylish chair design will help to brighten up your working environment. New, clean, crisp designs can be beneficial to mood and morale, more so than an old, threadbare seat could ever be.
To make your office chair fit your needs, set the seat to its highest setting before sitting down and adjusting it downward until your feet are flat on the floor and the backs of your knees are at the same level as the seat. The backrest of your chair should be at a angle where it provides support for the lumber region of your lower back, as this is the most common area of the back that office workers injure. Avoid reclining the back rest too far or bring it too far forward. Play around with the recliner function until you find a position that feels comfortable and provides support to your back.
If your office chair has arm rests, make sure they do not get in the way of typing or using your computer’s mouse. When using a computer, the arm rests of a chair should not be used. Only use your arm rests when you are taking breaks from typing. To prevent temptation to rest your arms on them, lower them while you are working.
By taking these things into account, you should be able to improve the way you sit at your desk, hopefully preventing any health issues that come from sitting for extended periods of time. If you have any questions, consult the Health and Safety Executive for guidance on working with computers.
Source: http://blog.brilliance.com/2012/marriage-proposal-guide-infograph