What is the best form of exercise?

What is the best form of exercise?

“Probably running. It is important to do any form of exercise so that he do not get fat.”
Jordan Lewis, Independence

“Anything cardiovascular is good to keep in shape. We are the most obese country in the world and if as a nation we start exercising and get in shape, then we can change that.”
Matt Cooper, Independence

“Definitely something like running. Anything you can do to slim do is good so you are not huffing and puffing going up the stairs.”
Courtney Gapelu, Independence