Not just athletes but also people who exercise better in the morning.<p>I have to head out running before 06:00 ( ex-farm border collie dog still has early-rising demands ) so need to eat about 05:30.  On a couple of occasions I overslept and skipped breakfast.  It was terrifying, I barely had enough energy to make it back home and was shaking.  All my body wanted when I returned was <i>sugar</i>, <i>now</i>.<p>So in my case at least a bowl of museli &#x2F; milk &#x2F; yoghurt and a banana is the minimum possible breakfast.