As we have found, Strelnikova exercise tend to help against headaches.
We had discussions of what could be the possible cause.
Here is an interesting overview of causes of headaches
and effects of different treatments.

http://www.physorg.com/news170684124.html


It points out that exercise can relieve the pain through
1) releasing endorphins
2) increasing oxygen level in blood

Both of this mechanisms have no harmful side-effects, as opposite
to traditional medications which as the article points out can
cause "rebound" headaches through withdrawal mechanisms, if used
repeatedly over long time periods.

Regards,
Yevgen