Monkbiker & Jeff,thank you so much for answering my question.
I am just starting with my qigong practice and it already feels wonderful - soothing and comforting after a long and stressful day. I surely hope it will help to ease my headaches and sinus inflammation.I'll keep in touch with how I'm doing.
P.S. Jeff, I have a love-hate relationship with Athens.
It's noisy, polluted and swamped in concrete but we always know how to have a good time here!