You are correct about the physical requirements. In the academies they are even more strict. Cadets and midshipmen have been released from the academies when they repeatedly fail to maintain their physical standards.

When my son went to infantry officer school, 50% of the MALE class failed to complete the course. And these were recently commissioned officers that were all top tier physically and mentally.

That woman who supposedly made it through the first 11 days? My son told me that she actually asked to be released after the 2nd day, but the leaders decided to keep her there a while longer to avoid the fallout from the press and politicians.