当你跑步时，你的身体内部会发生什么。这个视频用搞笑的动画形式来告诉你答案。
Let's get running, team!
Give it everything you've got!
It's only three miles, right?
We'll run to the port and back, alright?
It's a piece of cake!
And at the same time, we'll kick out that unwanted guest in our stomach!
What?
Are you talking about me again?
Alright!
You've got a super motivated heart here!
