From personal experience, I'd have to say that I prefer mornings. I like to get going ... but evenings are also helpful for de-stressing. So, it's really personal preference (which can change over time).
It's all in your mind, if you naturally think "oh I feel like I get the best work out in the morning", you are mentally prepped to do your best then.
There are some variations of metabolic rate differences depending on whether or not you just woke up, etc, but nothing substantial that would largely improve your performance from my knowledge. Unless you have a specific schedule that may affect your performance, (i.e. you have a physically arduous job and you have to decide whether its best to work out before or after), no biggie.
I usually go to the gym at 4:30am for about a half hour doing cardio. Is the morning the best time to work out or evenings are better?
4:30 a.m.? Are you getting enough sleep? I never cared much for getting up and working out early (7-8 a.m.), but have done it
on occasion. Most of my workouts have been past noon, but that's
just me. But if these wee hours work for you, I don't see anything
wrong with it if you stick with the schedule, then again, it might seem
to work against the body's natural 24-hr cycle over time.
ive been told that working out earlier in the morning/day increases your metabolism for the rest of the day...but as everyone else said it just matters that you work out period...if you cant do it at 4am one morning but later on in the afternoon works better then do that...i've just been told that morning is better