Too Much

MB suggests I am doing too much. This is after a crazy workout at Crossfit, one that left me tired (I went home and laid down for one hour) and too sore to type. Yeah, I was too sore to work on my novel.
Maybe, MB suggests, you shouldn't try to: teach full-time, keep up this crazy workout schedule, be a Mom, run, be social, etc., especially when I have trouble sleeping, which I do.
Maybe.
Maybe it's my crazy workout schedule (Monday: off; Tuesday: Crossfit; Wednesday: run; Thursday: Crossfit; Friday: run; Saturday: Kettlebell class; Sunday: run). But, sometimes I don't run on Wednesday, sometimes I go to Crossfit or do nothing.
Maybe it's my sleep schedule (go to bed around 11, get up around 7). Sometimes I wake up before 6 and just lay there, my mind busily spinning with the things I need to accomplish. Sometimes I fall back to sleep. More often, I don't.
What is this too much of which he speaks? Is it just the human condition that we try to do more than we actually can? Is this an affliction of the working/writing Mom? Is this an affliction of the woman of 2009? It's not enough to be a writer or to be a Mom, I also have to be in shape and awesome?
I have to say, I like to work out, it's good for stress, though sometimes it causes stress. My workout buddies are my social group, my friends. If I didn't work out with them, I wouldn't see them. Sad!
But what about writing? I will finish the novel this year and I think I can work out AND work on my novel.
In my opinion, it's all the grading that intrudes on my writing time. That, and napping when I can't hold my hands up long enough to type a word. There is that.