Former teen track star Mary Cain is speaking out about the psychological abuse and body shaming she endured, which ultimately led her to abandon the sport.

<img alt="A picture of a woman sitting cross-legged" height="349" src="https://i.cbc.ca/ais/0b702fa1-3c30-4efd-b30c-41fd14a65e3f,1777664787233/full/max/0/default.jpg?im=Crop%2Crect%3D%280%2C80%2C3270%2C1839%29%3BResize%3D%28620%29" title="Former teen track prodigy, Mary Cain, 29, is revealing the years of psychological abuse and body shaming that forced her to leave the sport she loved in a new memoir, &apos;This Is Not About Running.&apos;" width="620" /><p>Former teen track prodigy, Mary Cain,...