I have had two daughters do well on the CFA, both admitted to the academy. Here are some points that may give you reassurance, and training advice for all: DD-2 could not do a pull-up in January. We put a pull-up bar in the hall-way. She practiced 'jump-ups' where you jump up, grab the bar and pull yourself above the bar with the momentum you have. She also practiced climbing from a stool to a position with your chin above the bar and then slowly lowering yourself down. Also, dead arm hangs were great in the beginning, you have to develop hand strength and shoulder conditioning. End of February, she did her first pull-up, then it was months of slowly building strength (like three months of only doing one pull-up). Finally she worked in ladders, 1, 2, 3, 2, 1 sets of pull-ups. Don't ever try to max yourself out while training, that's how you injure yourself. If you do want to test your max pull-up count, try it once a month (shoulder injuries are easy to create). She maxed out pull-ups on the CFA in July, she said it was the easiest part of the whole test because she spent so long training and started off slow.
Here's what she's telling me now: A lot of people think that since we're athletes, pull-ups will come as easy as sit-ups. I've been a competitive swimmer since I was seven (also running varsity xc and distance track). It doesn't matter what sport you do-- the pull-ups and the whole CFA need months of training. For those of you preparing for the CFA for Class of 2025, start now. Look at how many weeks you have, buy a pull-up bar, start running, start easy and don't injure yourself. The whole CFA is intimidating, it's scary, it's falling asleep at night thinking "this is my future." Try to be physically fit when the time comes so you only need to worry about the mentally scary part.