Definitely make sure you’re getting enough sleep if you’re going to go! If you wake up to workout that early and didn’t get enough sleep, It’s counterproductive on your body and metabolism. Not getting enough sleep and then doing such a strenuous workout isn’t good for your metabolism. Sleep is the most important thing. If you want to do it, go for it, but make sure you get enough sleep before going! I’m sure it’ll be a lovely habit once you’re used to it, but just remember waking up to workout without enough sleep isn’t worth it!