Many questions come to mind concerning running and runners and public health.

Here are a few.

1. Why do runners live an estimated 2 to 2.5 years longer than non-runners?

2. Why are runners rarely overweight?

3. Among runners do they have the same incidence of the following problems compared to non-runners that so far the causes of which are basically unknown? Muscular dystrophy, multiple sclerosis, Parkinson's disease, amelanotic lateral sclerosis and Alzheimer's disease?

4. Why do women runners have so much less breast cancer than non-runners?

5. Why do runners have so...

Many questions come to mind concerning running and runners and public health.

Here are a few.

1. Why do runners live an estimated 2 to 2.5 years longer than non-runners?

2. Why are runners rarely overweight?

3. Among runners do they have the same incidence of the following problems compared to non-runners that so far the causes of which are basically unknown? Muscular dystrophy, multiple sclerosis, Parkinson's disease, amelanotic lateral sclerosis and Alzheimer's disease?

4. Why do women runners have so much less breast cancer than non-runners?

5. Why do runners have so...