Shit! There is no way i could train at 4.00am,im not really a morning person.I do train at 11.00am because i have my own gym and have to train when it is the quietest.I get up around 7.30am,do cardio from 8.00am - 9.00am.eat breakfast at 9.30am then train at 11.00.Works well for me.If i had your situation i would do cardio,go home and eat,then train.Or do my cardio after training.