One of the prob­lems with office work is that many of us are using chairs that don’t fit our bodies very well or give ade­quate sup­port to the back, said Jack Den­ner­lein, a pro­fessor at Northeastern’s Bouvé Col­lege of Health Sci­ences in Boston who spe­cial­izes in ergonomics and safety. If you are expe­ri­encing back pain, you may be able to adjust your chair to increase its lumbar sup­port. A good office chair will have an adjustable seat pan that you can slide back and forth as well as adjustable back and height fea­tures. First, sit in the chair so the lumbar region of your back, your lower back, is resting on the back sup­port. At the same time, your feet should be resting com­fort­ably on the ground and the back of your knees should be about three-​​finger widths from the edge of the chair, said Dr. Dennerlein.

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