Is it normal to get a headache after a 4 hour lecture at school?

Headache: Its not abnormal to get a headache after sitting for a 4 hour lecture but you have to figure out ways to calm yourself, taking mental breaks to ease the buildup of tension when your in class. It is not realistic to sit for 4 hours, i would assume you take breaks, when you do consume a good snack, greek yogurt, nuts, hydrate so when you return your refreshed, do wall push ups to get blood flow.