![Portion Distortion screen shot](https://webarchive.library.unt.edu/web/20161103005437im_/https://choosemyplate-prod.azureedge.net/sites/default/files/misc/tools/PortionDistortion-screenshot.png)
To see if you know how today's portions compare to the portions available 20 years ago, quiz yourself on Portion Distortion by the National Heart, Lung, and Blood Institute (NHLBI). You will also learn about the amount of physical activity required to burn off the extra calories provided by these larger portions.