08/28/2012 05:57 pm ET Updated Oct 28, 2012

15 Ways 20-Somethings Ruin Their Twenties | Thought Catalog

Flickr: Lel4nd

1. Letting themselves get out of shape. If you've ever watched The Biggest Loser and questioned the contestants desire, based on their struggles -- you've never been out of shape. You'll find that the rumors are true, and your metabolism moves slower than a snail at the DMV as you get older. If you continue washing down brownies with Mountain Dew and discounting the value of working out, you will pay. I assure you that once you've officially gotten out of shape, it's so much harder to get fit. The mere sight of a treadmill will make you want to run anywhere but on it.