Humor

My mother sent this to me:

Health Message:  1. If walking/cycling is good for your health, the postman would be immortal. 2. A whale swims all day, only eats fish, drinks water and is fat. 3. A rabbit runs and hops and only lives 15 years. 4. A tortoise doesn't run, does nothing. yet lives for 450 years. AND YOU TELL ME TO EXERCISE