If you've spent hours playing games like Tetris, you might have felt that bit of guilt for having played so long. It might seem like a total waste of time, but as it turns out there may be some concrete benefits to playing the game. 

That's the result of a new study in the journal Appetite. It found that playing the video game can reduce our urges to eat, smoke and drink. We're joined by Plymouth University researcher Jackie Andrade, who was one of the authors on the study.