I won't lie, I didn't quite get the importance of nutrition. It wasn't until I went an entire die of barely eating anything and went for a run. It wasn't a short run either. I went for an eight mile run that day.
When I finished I ate a small bowl of cereal without milk. For some idiotic reason I believed that would suffice. The following day I was lethargic, sore and completely out of whack. I clearly didn't fuel my body properly. I ate as much as possible the entire day. It took that one lesson to understand that carbs were my best friend.