Spending extra time in bed is good for you.
Spending additional time in bed is good for health
Researchers believe that hitting snooze on the alarm clock and spending an additional 30 minutes sleeping makes people more alert in the morning.
Those who had additional rest performed better in brain tests than those who got up immediately.
Experts in Sweden put the performance boost down to not being woken up too suddenly from rapid eye movement (REM) sleep - when the majority of dreams happen.
The team found that the extra 30 minutes of slumbering did not affect memory, concentration and performance in maths tests when compared with waking up instantly.
Dr. Tina Sundelin, of Stockholm University, said: "The findings indicate that there is no reason to stop snoozing in the morning if you enjoy it.
"In fact, it may even help those with morning drowsiness to be slightly more awake once they get up."