i always use to jog at 3 or 4am. For me it was just because I liked jogging when there was no one out and about, no cars etc. Plus I just like the darkness and calmness.
When I was boxing we would run at about 5AM. My trainer told me we run first thing in the morning for 2 reasons. The run is more effective (empty stomach burns fat reserves, not the food in your stomach), and better air.
I've heard this too but it makes no sense to me. Surely that means that later in the day you'll have to sleep... presumably when your opponent is training!
Thats not true. When you have no food in your system and start exercising the body starts to store the fat it already has. If you want to lose weight your best eating a little and often.