Originally Posted by
Carbonfiberboy
I notice a weird thing once in a while when riding somewhat unrecovered and on low calories: My legs are working OK at moderate intensity, but my head isn't good. I think that's because of depleted liver glycogen while leg glycogen is OK. Legs work, brain doesn't.
This happens to me. Brain fog but my body feels fine, though I haven't been able to figure out the trigger or conditions that lead to it.