Yet even after we've put away the books, logged off the Internet and returned from our final trip to the all-night convenience store, millions of us still have trouble sleeping. It's time to sleep . We want to sleep. But we just can't. Several factors may be involved.
Stress is perhaps the best known.
Almost every college student has tossed and turned with worry about an unwritten paper or an unfinished problem set. Stress increases heart rate and blood pressure, raising excitement levels. Students say the sensation can become almost electric. It can keep a person awake for hours. While there are various ways of controlling stress, it will most likely remain a constant pressure in the lives of college students and beyond.