Person How Do You Motivate A Person To Exercise?

How do you motivate a person to exercise? - person

I have a close friend who does nothing but sit all day, and the person, the lessons for about 12 hours. He goes home and sits and sits on your computer. I try to have to get up and some jumps, but the person just ignored me. As you do not motivate a person to their anger? The person who is gaining weight and I do not think a little practice will help a lot.