Why is it so hard?

So my alarm goes off every morning in time for me to go work out... but why is it so hard for me to get out of bed and do this? The alarm went off at 5:45 this morning and I lay there thinking... I can do it after Church... oh but I have that meeting from 1-2:30....ah I can do it after then!! ... oh but we have group tonight from 5-7.... I can do it after then.... oh but we have to pick up DD from my paretns so it wouldn't be till after 9 probably. OK OK OK, I will get up and do it now... but I DON'T WANT TO! Well I got up and ran and lifted weights. I felt AMAZING after I was done. I was thinking at Church how much energy I had! WOW that was nice. I came home did some laundry, picked up Alex's room and organized her bathroom!! So when I feel this good and get this much done, why is it so hard to get up when my alarm goes off?