Why does reading make you so sleepy?

Question

In 6th hour today we had to listen to a story on tape and follow along in a book;it made me so tired and I kept catching my eye lids falling...and I was just wondering, why does reading make you so sleepy?

Answer 1

you are not reading the right stuff.

Answer 2

You are bored and probably need glasses. You get tired when your eyes are sore (need glasses and don't know about it).