Swollen elbows, finger numbness, wrist pain, forearm ache, tendinitis, or even small cysts known as ganglions can be the result. Like tennis elbow, it afflicts those with bad form far more often than those who use good techniques and take preventive measures.
People working at home or on the road are especially vulnerable.
But no one has to suffer any longer. An ergonomically-sound chair should first of all feel comfortable to you. Pick a stable and firm one that lets you sit relaxed with enough unrestricted movement to do your work. Padded arm rests are okay, but shouldn't prevent the chair from sliding under your desk to put you close to your work. If necessary, get a footrest.