We have all been there, you just didn't get those eight precious hours of sleep you so badly need and crave and you now you are just feeling groggy and out of whack.
So what is the reasoning behind this and how is it possible that we can now tell how tired we are ... from a spoon?!
Apparently all you need is a metal tray and spoon.
"The Sleep Onset Latency Test" is conducted by Dr Michael Mosley and this is how it's done according to him.
Lie down in a quiet, darkened room in the early afternoon (note, this is a daytime test) clutching a spoon, which you hold over the edge of the bed.
You put a metal tray on the floor by your bed, check the time, then close your eyes. The question is: do you fall asleep and if so how soon after you lie down?
So basically you want to try and fall asleep so that you drop a spoon on a metal tray to wake you up again almost immediately.
If you fall asleep within five minutes of closing your eyes then you can be considered ‘severely’ sleep deprived.
Within ten minutes suggests you have issues with sleep, while anything over 15 minutes means you are probably OK.
We are definitely going to take note of how many sheep we are going to be counting tonight !