[Desi Tarka] Exercise?

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 PEOPLE TELL ME TO EXERCISE!