I did a pretty hard workout yesterday around 11AM till almost 1pm. (yay for incline trainers!

)
Last night I woke up at 2:30AM and really couldn't fall asleep until right before my alarm went off (..figures!)....
This isn't the first time I've noticed this. It seems as though long/hard workouts mean I don't sleep well. I wake up and my heart rate feels elevated and I just feel restless.....widdeeee awake.
I've searched online and other people seem to have this too, but I can't seem to find any definitive on preventing it.
anyone here know something to prevent this?
I so sweepy