Everything that happens to your body if you're constantly waking up in the dark

There’s no challenge quite as insurmountable as dragging yourself out of your warm bed in the pitch black to squish onto a train and head to work .

Your body feels like it’s yet to wake up, and you can only hope you get a seat to rest your eyes for the next few stops.

Surely it can’t be good for us, all this constant waking up in the dark. So, Metro enlisted the help of a doctor to understand everything that happens to our bodies when we do.

Now we never want to wake up before sunrise again.

Why do we need light?

‘When you consistently wake up in the dark your body is being asked to override some very old biological rhythms,’ Dr Suzanne Wylie tells Metro .

‘Light is the primary regulator of your circadian rhythm , the internal clock that helps your body decide when to feel