THE POWER NAP

“Naps can absolutely be part of a healthy sleep routine,” Dr Robbins says, “but I recommend sticking to 20 minutes, unless you’ve had a really terrible night’s sleep, when you can stretch it to 90 minutes.” Studies back her up: New Zealand researchers found that those in high-pressured jobs scored better on tests of alertness and performance after they had a short sleep during work hours The best time to take a nap is after lunch, between 2-4pm