The brain learns and performs best when we use the least possible effort to accomplish a given task. For thousands of years, Taoist masters have emphasized this principle through their advice to use no more than 70 percent of our capacity in carrying out physical practices related to movement and breath. The Weber-Fechner psychophysical law (the law is described in detail on page 48 of Peter Nathan’s book The Nervous System, Oxford University Press) demonstrates one reason why this is so important; it states that the “senses are organized to take notice of differences between two stimuli rather than the absolute intensity of a stimulus.” When we try hard to do something, when we use unnecessary force to accomplish our goals, our whole body generally ends up becoming tense. This tension makes it more difficult for our brain and nervous systems to discern the subtle sensory impressions necessary to help carry out our intention in the most creative way possible. And it creates tensions throughout the body that make it more difficult to breathe freely and easily and thus undermines the spontaneous flow of the breath of life. So stop trying so hard; just let yourself be breathed.
http://www.authentic-breathing.com/seve ... athing.htm
Don't sit up late at night trying to finish that programming task
Best regards,
Czarek