It is a well known fact that we can suffer form a mid-afternoon slump as our bodies are designed to have two sleeps.
According to the NHS, we are most likely to feel a slump at around 2.16pm as this is about the time that your cortisol level drops, and along with it so can your mood, focus and motivation.
Researchers now say that if you drink iced water, this may help to make you feel more awake by setting off tiny pain triggers.
Other things to try are changing your routine, i.e. walking a different root to work, cleaning your teeth with your left hand. Apparently the brain responds to these experiences by releasing a rush of neurotransmitters, such as dopamine, which can make us more alert.