I think that article, or another one like it, stated that if you run more than 15 miles a week you are doing it for something other than health benefits. I think the marathon runners dropping dead with heart problems are probably running more than that. You don't need more than that to be healthy and you can do much less than that and be healthy.
Female, 5'3", 49, Starting weight: 163lbs. Current weight: 135 (more or less).
Starting squat: 45lbs. Heaviest squat: 180 x 2. Heaviest Deadlift: 230 x 2