I have been pushing it to get fit for a small movie role next year but it is 12:39 and I cannot sleep, same as the last week and getting worse. I'm doing a modest enough ~8 mile walk with a weighted backpack (30kg/66 pounds now), alternate that with swimming days and what was 4.30am every morning before trading climbing the 22 floors of the apartment building and back down pumping kettle bells. It is getting harder to wake at 4.20am as I'm not falling asleep at 10pm as I have for years. I'm getting in fair shape no worries for ~50 years old and but I've not had restless tossing and turning without sleep like this since I was in my teens and 20s. Any ideas guys? I've tried extra calcium to see if that helps soothe muscles but as I get fitter my body wants to stay awake (though my brain is tired.. so tired).