Scientific beliefs about the origin of fatigue have shifted.
Formerly, physiologists believed that fatigue existed in the
body. They believed the muscles became depleted of essential
nutrients after strenuous activity and fatigue would set in. But
that theory didn’t explain computer programmers who became tired
after eight hours in front of a computer, or accountants who
fatigued from crunching numbers all day. According to a recent
New York Times article, the mental choreography of fatigue is
intricate, involving messages sent not only from the brain to
the straining muscles but also to various areas within the mind
as well. Data from some recent brainwave studies of athletes
showed that during long, hard exercise, there’s often a moment
when portions of the brain actually lose motivation. When this
occurs the fatigued individual cannot effectively cope with
complex task for a variety of reasons. Fatigue manifests itself
as a subconscious desire to avoid responsibility. Once the brain
loses momentum it simpl