Hi all. I'm somewhere around week 4 of the programme (I say somewhere, as I'm kind of doing my own version) and can now run continuously for 4 minutes, which feels amazing. The trouble is that I seem to be getting a headache after every run. Does anyone else get this? And if so, how do you prevent it? I try to make sure I'm hydrated before a run, but I don't want to drink too much as I don't want all the water sloshing around in my belly as I run. I also drink at least a glass of water when I come back, and I make sure I eat something once I've cooled off. Is there anything else I should be doing?