I know, brain fuzziness isn't a technical term, but hopefully it makes sense...
I train in the mornings before work (because the gym is waaay too busy after work), usually around 0700, after waking up somewhere between 0600 and 0630.
I generally eat a banana and have a glass of beetroot juice before training, just so I've got something in my stomach to train on (note: I never used to do this and used to feel really sick part way through the session, so this does solve one issue).
The training is either Squats > Overhead presses > Chin-ups or Squats > Kettlebell swings > Turkish get-ups.
The workouts are tiring, but I wouldn't say excessively so and I generally leave feeling pretty good, but knowing that I've trained.
Post workout I have a whey protein shake, followed about 30 minutes later by something along the lines of roast butternut squash / sweet potato (or stir-fry veg) and some form of protein, normally fish related.
The problem is, when I get to work (I work as a software developer), my head gets a bit "fuzzy" or "foggy" and I really struggle to concentrate on things for a few hours. If I'm working on something I know well, then it's not an issue, but if I'm working on something unfamiliar, I really struggle to work through things.
Has anyone else come across this? Could it be some form of low level dehydration (I'll admit, I normally forget to drink during the training session, but tend to chug up to a litre of water when I wake up). Any suggestions as to how to avoid it (aside from not training in the mornings).