Short workout or nap can help protect memory after sleepless night: Study

A short workout or a nap can help protect memory after a sleepless night, a McGill University-led study found. Researchers found that people who either completed 20 minutes of moderate-to-vigorous exercise or took a 90-minute nap performed about 22% better on memory tests after 30 hours without sleep than those who did neither. The study involved 54 healthy young adults.