What are the factors that affect life expectancy and how much does each contribute? Is the healthcare system a contributing factor, if so by how much?
nutrition - obviously alot, for obvious reasons
crime - dont want to get shot
education - if you dont know what to look for or expect things can get worse
habits - if you smoke your lungs or drink your liver away, then your done son
pride - you need help, dont be afraid to admit it
no drug plan 0 gotta buy those meds now
sanitation - dont want dysntery
cleanliness- if you stink you probally have alot of germs living on you
how much does each contribute? well that depends on the individual
do you mean like infant mortaility, still births that kind of stuff?
Running is one, yes. Any exertion that makes you breathe heavy will do it, though.I heard when you do alot of running it will help clean your lungs out, because of the heavy breathing is this true?
Geography. People that live in flood plains, earthquake zones, slide areas, near volcanoes, tornado alleys, etc. probably won't live as long as others.
Stress. Lower stress probably means longer life. Certainly better quality of life.
I think a big part is your genes but you can of course make a huge differnece by the foods you eat and the lifestyle you follow. Stress can really be a killer.