A new study puts some statistical evidence to something that we all pretty much know... a healthy lifestyle is good for longevity.
The study used data from about a half million people (avg. age 58) and followed them over the course of a decade. The research showed that someone with a healthy or very healthy lifestyle score lived 3.5 to 7.6 years longer. Lifestyle factors included physical activity, diet, smoking, and alcohol consumption.
Importantly, this extension was true both for people with multiple comorbidities (20% of the population group) and for those without. Thus, even if you have something going on - diabetes, high blood pressure, etc - a healthy lifestyle will still reap the rewards.