Variations in time a person goes to sleep and wakes up ‘strongly associated’ with higher risk of negative impacts

Failing to stick to a regular time for going to bed and waking up increases the risk of stroke, heart attack and heart failure by 26%, even for those who get a full night’s sleep, the most comprehensive study of its kind suggests.

Previous studies have focused on the links between sleep duration and health outcomes, with people advised to get between seven and nine hours shut-eye a night.