I run, lift, and do heavy Colorado trails at high heartrate levels. I find exercise makes it generally more difficult to sleep. Has been a problem for years, only get real sleep on my rest days.
Thinking about this more, I'd agree with this too. That and mediation. Back in my insomnia years, I got so bored of lying there awake that I took up meditation. I found that when I meditated (sometimes up to an hour) I found that I needed even less sleep.
Given what we now know about chronic cardio and it's incredibly damaging effects on the body and the terrible consequences of losing sleep and the fact that it's been a problem for you for years you sure sound resigned to it all. I hope you don't suffer the typical consequences of such a dangerous lifestyle. Consider reading this: http://www.marksdailyapple.com/the-evidence-continues-to-mou...
Given what we now know about chronic cardio and it's incredibly damaging effects on the body
That looks like FUD from somebody who's living depends on blogging FUD. Of
course, it's possible to train too hard, but this is very bad advice for the
average (slightly overweight, not very active) person. If you worry about
training too much, go talk to a sports physician and take a cardiac stress
test. Or just run so slowly that you can breathe through your nose only.