9. Hold your stomach in 收腹运动

This is easy exercise if you're feeling lazy. Just holding your stomach in when you're walking or waiting for the bus can help tone your belly.

这个很简单，尤其当你感觉懒得做运动的时候。只是保持收腹就可以了，当你走路时，或等待公共汽车时，都可以做。这个姿势可以有助于你操持腹部平坦。