That is way too early to start a day. My husband had to go into work early and the only way I would get my run in was to do it then. I could have done it at night, but who wants to do it then? I ran 7 km this morning. It didn't feel great, I hadn't eaten anything, just got up and started running, so I think that had an impact. Breaking it up by 500 m doing different speeds really helps. And so does getting off to get a drink and let it run, also helps.
I will be pouring the caffeine into me today I think.