I know that the CFA isn't the greatest way to compare what girls at USAFA go through during PT, BCT, etc but I just want to share my story.
Honestly, I was a girl that couldn't do anything on the CFA. I know this because when I went to Summer Seminar, I rarely made the averages on the CFA requirements. Needless to say, I didn't max out on anything. I had a pathetic 30 feet basketball throw, ~60 situps, ~20 pushups, no pullups, and a HORRIBLE mile time (I was probably one of the slowest). The one thing that I made an average score was on the shuttle run.
Seeing that I was physically inept, I was motivated to work out and train so that the real CFA that I would take in the future would turn out to be with great results. Daily, I worked on pushups, pullups, and situps. My martial arts class offers Friday night classes where we would just condition (literally hundreds of situps, pushups, "power pushups", bear crawls, etc.) Cross Country helped me with my mile and shuttle run (all of those sprints!). For some reason, I forgot about the basketball throw and didn't really focus on that. But I guess I didn't really need to because of the other conditioning exercises that I was working on daily. Needless to say, I got stronger, both physically and mentally. I was ready for the CFA and got at least all average scores, if not, maxed out on them. I even maxed out on the men's shuttle run and situps.
Sorry for the long post, but I assure you that if you put your heart into it along with perseverance, nothing is impossible. I can testify that