Taking a power nap on a night shift can leave you feeling groggy. And eating a large meal can reduce your alertness. So, what's a tired shift worker to do to make it through the night?
How to eat yourself brighter.
Non-stop public transport might suit the 24-hour party people, but it could have rougher consequences for others.
New research suggests disrupted sleep patterns could have more impact on some measures of women's performance than men's.