When it comes to sleep, quantity is important, but researchers at Duke Health and the Duke Clinical Research Institute, USA, say consistency is more significant. To reap the full benefits of a good night’s sleep, keep to the same hours for going to bed and waking up. This means that if you’re able to function on five hours’ sleep, make sure it’s the same five hours every night. Rather than retiring only when you’re truly fatigued, set a time when you’re more likely to doze off and stick to it. Your heart and metabolic health will be more stable in this routine than in a haphazard sleeping schedule.