From FortWayne.com, an article that examines the relationship between the physiological effects of stress and the rate of aging. Like inflammation, stress causes changes that can be considered as "running the engine hot" or as a form of cellular damage. As the Reliability Theory of aging tells us, either of those things are likely to reduce our life span and make us less healthy as time goes on. You should skip over the flawed discussion of an upper limit to life span, however - Reliability Theory suggests that there is no such thing (aging is a consequence of accumulated damage), and even if aspects of aging turn out to be programmed into to your genes then future biotechnology will be developed to do something about that programming.
Link: http://www.fortwayne.com/mld/journalgazette/living/11985302.htm