Probably going to get piled on for this, but I would think this is less risky than it sounds. For one thing, it does say she consulted extensively with docs and birth experts beforehand, and they said it was acceptable.
More to the point, think of it this way: 15000 years ago, being able to sprint like this, while pregnant, would have been a valuable survival trait. Since pregnant females are high-priority targets for predators, it’s virtually certain that human women were pursued by predators while pregnant, and it would be counterproductive to lose the fetus as a result of having to escape a predator.
Had this woman been trying to run a triathlon, or a marathon, or some other extreme competition, it would be one thing, but a sprint works very differently on the body. While I’m not a sports-medicine expert, I would think she’s ok on this one.
“While I’m not a sports-medicine expert, I would think she’s ok on this one.”
That theory works fine until she trips and belly flops.