She still has to pull the bow past the 80 lbs. Most men could not pull an 80 lb. bow, compound or otherwise.
I could pull a 60# compound when I was 13 or 14. Not easily, but I could do it, and once past that initial grunt, I could hold it at draw easier than my 45# recurve. That was back in the dark ages of compounds, as well. I wouldn't be surprised that they are much better engineered today. I haven't shot in years now, and even then it was most recently a self bow in the traditional longbow style. The way I was taught was to not hold the bow at arm's length and draw with the right only, but to simultaneously push my left hand forward, pull my right back, and twist the torso, thus using the strong back muscles to draw the bow. Of course, I might have been taught "wrong", but the technique worked.