If you sleep in on the weekends, you’re not lazy. You’re simply doing your body a favor. According to a recent study, researchers found that people under the age of 65 who slept for five hours or less every night, all week, did not live as long as those who consistently slept seven hours a night. But weekend snoozers lived just as long as the well-slept. People who slept for fewer than the recommended seven hours each weekday, but caught an extra hour or two on weekends, lived just as long as people who always slept seven hours.