The human body evolved expressly to move. We run, jump, and climb as soon as our tiny limbs allow it. But a select few thrill-seekers go much further, hungry to push beyond our species’ more-mundane corporeal capabilities. The most extreme among us fling, squeeze, and stretch their bodies in the name of guts, glory, and even entertainment. Here’s what all that abuse does to their agile-but-fragile frames.
This article was originally published in the Spring 2019 Transportation issue of Popular Science.
is the Science Editor at Popular Science. She has a particular interest in brain science, the microbiome, and human physiology. In addition to Popular Science, her work has appeared in The New York Times, Scientific American, and Scholastic’s Science World and Super Science magazines, among others. She has a bachelor’s degree in neurobiology from the University of California, Davis and a master’s in science journalism from New York University's Science, Health, and Environmental Reporting Program. Contact the author here.