• Many people are afraid of running because between 30 to 70 percent (depending on how you measure it) of runners get injured every year.

    Daniel Lieberman: Many people are afraid of running because between 30 to 70 percent (depending on how you measure it) of runners get injured every year.
    "Brains Plus Brawn" by Dr. Daniel Lieberman, www.edge.org. October 7, 2012.