The stunning gymnast, Katelyn Ohashi takes on the US Marine obstacle course to prove her fitness and stability. Ohashi joined Austen Alexander, a YouTuber and active-duty soldier in the U.S. Navy, to take on a course practiced in Marines’ physical training. Most of the obstacles were so high that the tiny girl needed a lift before she can even get a hold on them, still, she shows some awesome core and upper body power getting herself up and over the logs and walls. Here is Katelyn Ohashi vs US Marine.