Do we run because we like the pain?
(..)
The problem, it seems, is that we have only one word, “pain,” for something that should have many descriptors, as in the old legend that Eskimos have many words for snow.
Markus Amann, a muscle researcher at the University of Utah and the Salt Lake City Veterans Affairs Medical Center, says that what actually stops or slows most people during exercise is fatigue, not pain. It is regulated by a group of nerve fibers, the so-called ergoreceptors, that respond to a combination of metabolites released by muscles during exercise — calcium ions, lactate, hydrogen ions. In response, the brain “decides” to slow down, Dr. Amann explained.
(..)
The problem, it seems, is that we have only one word, “pain,” for something that should have many descriptors, as in the old legend that Eskimos have many words for snow.
Markus Amann, a muscle researcher at the University of Utah and the Salt Lake City Veterans Affairs Medical Center, says that what actually stops or slows most people during exercise is fatigue, not pain. It is regulated by a group of nerve fibers, the so-called ergoreceptors, that respond to a combination of metabolites released by muscles during exercise — calcium ions, lactate, hydrogen ions. In response, the brain “decides” to slow down, Dr. Amann explained.
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