Ageing while "time traveling"?

I don't know much about these things but i'm wondering something. I'll try to explain what my question is as good as possible but this may be hard due to my lack of knowledge on the subject

If I understand correctly there are places in the universe where if you could be instantly teleported there and spend a hour there and then be teleported back to earth, on earth let's say a year has passed (so you kind of time travelled).

Now what would happen to your body when you're in such a place? Would you instantly become tired and hungry because in the first 10 seconds that has passed a day has passed on earth or would your body after the hour has passed just aged a hour? So how would your cells react is the question i think i'm trying to ask. Do they "know" time is somehow slower and adjust to this or not?

I hope my question is clear and that someone can answer it, thanks in advance.