It's just our chemical and gene makeup i guess..I have been like that too....I was into running an average of 67 miles a week and running marathons in the 1980's and have been excercising all my life...At one point i was sleeping about 3 hours a night.I got on Xanax for about 4 years...I was taking enough to knock out 2 or 3 normal people and finally i got off it myself as a way to get better sleep.......................I have been on Ambian 12.5mg and also tried Zolpidem Tartrate 15 mg and it helps...IF i take 20 mg it's best for me,but i just have come to the conclusion that's the way my body is...I still workout some but lack of sleep catches up to a person...I work outside alot too.....I have numerous doctors over the years "it's like my adrennal gland turns on and i can't turn it off"........i wish i could help more but knowing your not alone helps some.....I got energized. That wasn't supposed to happen, and now I can't sleep. I WANT to sleep, but my body is denying it to me. I even did some pull ups, but those didn't help.
The ambien didn't even help either. I'm at a loss.