It's vague because it's a mainstream recap of a scientific study. Usually, when they say 30% lower risk of death, they mean a lower chance of dying prematurely. The mainstream media tends to simplify too much in my opinion. I would assume that the people who didn't do housework likely had a cleaning service and were less active. Naturally, if you have a house cleaner and you spend your free time riding or working out, the data wouldn't apply to you. The main point here is that being activity reduces your chance of dying prematurely from things such a heart disease, Type 2 diabetes, and even cancer.

If you want to see another presentation with very similar information in a more 'scientific' format, check out this link.

Why Fitness Matters

The http://fitnessrocks.org website itself is also very good and you can subscribe to the podcast to hear weekly reviews of scientific studies about longevity.

Quote Originally Posted by malkin View Post
How do they establish a "30% lower risk of death?" Ever? or only during the housework hour? What were the other subjects doing? Riding motorcycles drunk and without helmets? or nibbling blueberries?

And they figured this out by studying people in their 70s and 80s...Does the result apply to anyone older or younger?

Still, pretty interesting things to think about.