I did the C25k program at my local leisure centre without any problem, but after doing my graduation run with the group, I had a headache for 2 days. I continued running for weeks after with no more problems. But then I did my first (and so far, only) parkrun and had intense headaches for about 2 weeks. The GP has diagnosed cluster headaches which I had never heard of, but the symptoms seem to fit. I am wondering if it might have been slightly anxiety-related as I haven't suffered at any time when just plodding along on my own. Plus the chemist advised about perhaps taking electrolytes, hydrating well etc. Just wondering if anyone else has had a similar experience?
I have to add that it hasn't put me off running - I stopped for 1 1/2 weeks during the worst of the attack but got out again as soon as I felt I could and I desperately want to get back to my next parkrun!