You may be surprised to know there's evidence that moderate consumption of alcohol has health benefits, especially for the heart. Of course, excessive alcohol intake is known to be detrimental.

http://www.mayoclinic.org/healthy-living/nutrition-and-healt...

Interestingly the same can be said for aerobic exercise. 30 minutes of aerobic exercise four times per week has positive health effects. Running 100 miles per week (the training schedule of a serious marathon runner) is bad in the long run (pardon the pun).

Of course, all this is for an average person. If you have a family history of liver cancer or alcoholism, it's probably a good idea to be a teetotaler. If you have bad joints, certain heart conditions or are too heavy it's possible that running is a net negative for you.