....i have been suffering this VERY same thing for the past few weeks
i fall asleep pretty easily. when i go to bed at midnight, i wake at 4:45. and 5:45. and so on. until the alarm goes off. and when i try to go to bed earlier (b/c i am so exhausted from the broken sleep) at 10:30 pm, i wake at 2:22, and 3 something and 4:45. and 5:45. and so it goes.

i'm exhausted, physically and mentally, and my running is suffering. i feel like i've legs made of lead.

this happens even if i take a sleeping pill
(only over the counter sleep meds. . . i've never had prescription sleep meds. no insurance, no doctor) oh well. it sucks.