Maybe it's the cold weather, but I am sleeping really well and when I leave for work I feel good. Then as the day progresses I start to get really tired and my legs feel wasted. I know I ran a 50k race 4 days ago, but it feels as though I should be a bit more recovered than this by now. It is supposed to get warmer from now on. Maybe I'll have a better idea of how I am by the weekend.