To all the people crying about Gladwell in the Cain section of the film....please note the film wasn't some anti-women insight (which Women's Running basically insinuates). The film got it right and it wasn't a bunch of men saying this...here is Jordan Hasay in the Nov 20, 2019 issue of Canadian Running:
" Hasay goes on to say she didn’t think the program was a good match for an athlete as young as Cain (who was 16 when she joined the NOP), and that some of the other athletes had the confidence to push back against Salazar’s requests because they were older. She admits that Salazar was obsessed with athletes’ weight, but says he was obsessive about every aspect of their training, even suggesting that Hasay cut her hair to reduce drag, and (incredibly) that she wear a wetsuit to race the Boston Marathon.
Hasay claims Salazar even told her she didn’t have to stay so lean when she wasn’t racing, and that she should put some weight on. “It’s just every little detail is covered,” Hasay told Runners World, “and weight happens to be one of those things.”