Taking part in pertests and demonstrations can be good for your physical and mental health ,according to psychologists at the University of Sussex in the U.K.
　　 Researchers have found that people who get involved in campaigns ,strikes and political demonstrations experence an improvement in psychological well-being that can help them overcome stress , pain ,anxiety and depression . They hypothesize that the beneficial effects result from the development of taking positive identity and sense of unity with fellow protestors.
　　 'The take-home message from this research, therefore , might be that people should get more involved in canpaigns, struggles and social change but also for their own personal good ,' researcher Dr John Drury said in a statement.