The Art of Hanging Loose in an Uptight World was the name of the book which was written by Dr. Ken Olson in 1984. It was the first book i read about the stress management and relaxation. I think in 1984 the world was a peaceful place when compared to today. Hence what was relevant for 1984 might not be valid for today. Today we are living in a stressful world. The traffic in big cities more or less the same as Mad Max movie series of Mel Gibson. We all have to do some exercise or hobbies to hang loose in this uptight world. Only this way we can keep our brains and bodies in good shape. Personally i choose running as a hobby for hanging loose and keep my brain working properly. Do you know that your brain uses 30% of the oxygen you intake ? That is why aerobic sports are the best for your brain to work smarter.