Brains or Brawns?

Brains: You're now a complete genius in a few select fields of study of your choice. Suddenly you know everything and your IQ has gone up leaps and bounds.

Brawns: You now have a very muscular, permanent peak condition body of your maximum strength potential with low bodyfat and all that. This is a body that you don't to worry about maintaining, even if you don't bother going to the gym. Kinda like Superman

If you could choose between these two, which would you pick?

Brains
Br