A few years ago I was walking on the street outside of my home and to noticed a fairly nice fabric office chair placed in the trash. It had been discarded because of the broken wooden armrest. Ever the clever repair and by glued the armrest together and brought the chair into my office. I used this chair for several months until suddenly I noticed that I was feeling a great deal of chest pain after work each day. Examining the office chair and my placement on it I discovered that I had been pushing myself up and down on the chair to maintain proper vision of my computer monitor.
This repetitive action resulted in excess muscle strain on both my arms shoulders and chest. Within weeks after replacing the found chair with a modern ergonomic office chair the pain was gone and I was back to normal. Ergonomic office chairs allow for adjustable lumbar support, seat height adjustment and adjustment or removal of armrests. These differences mean that your body is properly supported when seated.