article_snippet.sent: If power napping, it is important to get no more than 20 minutes or inertia will set in .
article_snippet.sent: If choosing to break up your eight hours of sleep, napping throughout the day is the answer.
article_snippet.sent: Professor David Hillman advises 20 minute power naps to avoid falling into deep sleep and suffering from inertia which makes you feel temporarily worse off. '
article_snippet.sent: The longer naps, you get the sleep inertia
highlights_snippet.sent: Power naps should not be longer than 20 minutes or inertia will set in .