Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Hysterical strength describes displays of extreme strength by humans, beyond what is believed to be normal. It is a speculative term that is not recognized in medical academia; the concept has only a small body of anecdotal evidence to support it.The most common anecdotal examples are of mothers lifting automobiles to rescue their children, and when people are in life and death situations. Hysterical strength can result in torn muscles and damaged joints. This is why, in addition to high lactic acid production, the body limits the number of muscle fibers the human body uses.