In today's health matters, it seems many U.S. college students aren't getting the recommended seven to eight hours of sleep per night, a problem that could affect their ability to learn.
University of Cincinnati researchers asked nearly 200 undergraduate college students aged 18 to 24 who did not live at home about their sleep habits.
Most of them worked full- or part-time, and only 24 percent said they got at least seven to eight hours of sleep.
More than half said they slept less than seven hours, and 21 percent slept more than eight hours.
Researchers say lack of sleep can impair concentration and memory.