New research looking at the nation's sleep deprivation problem has found a lmost one-in-three Australians suffer so-called "social jet lag".
That is when the time of sleep on work nights differed by more than an hour compared to on weekends or days off.
Socially jetlagged people were more likely to go to bed late, wake up tired, be late for work and go to work when sick.
The research by the University of Adelaide found 31 per cent of more than 800 Australians surveyed were suffering from the condition, excluding night workers, evening or rotating shift workers.
The Sleep Health Foundation says sleep-deprived people can mitigate the effects by heading to bed slightly earlier and waking up slightly later, instead of having a large sleep-in.

