Salad, I agree.
To give others some context, the movie is about the annual
Badwater Ultramarathon that starts from Badwater, Death Valley (280' below sea level) to Mt. Whitney Portal at 8360' covering 135 miles and "three mountain ranges for a total of 13,000’ of cumulative vertical ascent." There were years that they had to run in a temperature of 135 degrees. The record time is 22:51:29 for men (10.2 minutes/mile) and 27:56:47 for women (12.4 minutes/mile).
What I took away from the movie was: Everyone in it will suffer big big time for sure. Some people would end up in hospital. To some degree, it's not a contest of fitness; rather, those who can endure the pain finish in the end. It's the attitude that you finish the race with that sets you apart. There is a reason why I say "the Brits are great."