Morning Brain vs Afternoon Brain

Why haven't I been running lately? It's all to do with the conflict between Morning Brain and Afternoon Brain.

Afternoon Brain says, "Let's work out."
Morning Brain says, "I'm sleepy. I'll go with Afternoon Brain (AB)."
AB: Remember, we don't generally get home before 7:30 or 8. The job that gets going about 11 (even though we've been there since 9) plus the hour commute and a need to eat at a normal hour and go to sleep at a normal hour mean that a post-work workout just doesn't work for us.
MB: I'm sleepy.
AB: You feel great when you work out. Just get up. Start tomorrow.
MB: I'm sleeeeeeeeeeeeeeeeeeepy.

What I would like to do:
M: Yoga in the morning. Hash in the evening.
T: FIRST key run #1.
W: Swim (or yoga until I get my pool pass in order)
Th: FIRST key run #2. Play volleyball with the wife in the evening.
F: Yoga.
Sa: FIRST key run #3.
Su: Swim if at home. Rest if busy.
Add a random tennis match with the wife in there once in a while.

What I have done since the marathon:
M: sleep
T: sleep
W: sleep
Th: sleep
F: sleep
Sa: yoga
Su: sleep

Does anyone else see the problem here? I've been wanting to go to bed at like 10pm and barely dragging myself out of bed at 7:30. I suspect that I need to just get up and that will help me not feel so sleepy. But I haven't been able to overrule MB yet.