Is eating grits really important in relation to exercise?

I think eating grits or brown rice act as a importance role in longer exercises, make longer time in digestion, and slow release the energy.

I am not sure. But it depends on your goal of doing exersice if you want to gain muscle than it is is good for you, but if you are doing it to be more awake or to lose fat then i am not sure.(sorry, I know this wasnt a lot of help)