If you eat well and exercise regularly but don’t get at least seven hours of sleep every night, you may undermine all your other efforts. Sleep disorders expert Harneet Walia, MD, says it’s important to focus on getting enough sleep, something many of us lack. “First and foremost, we need to make sleep a priority,” she says. “We always recommend a good diet and exercise to everyone. Along the same lines, we need to focus on sleep as well.” How much sleep do you actually need? Everyone feels better after a good night’s rest. But now, thanks to a report from the National ...