“This excessive tiredness can be caused by an overstimulation of adrenal hormones, which are being produced by the body in a state of stress but not being used in the modern office working day. One way to reduce these hormones in the body is to exercise, but most people avoid exercise when they’re feeling exhausted, thinking that they don’t have the energy even to walk to the shop. The reality is that a walk is probably the best thing you can do. Fresh air and exercise can help shift the tiredness rut.”