In my world there are a group of female warriors with an unusual ability: the resources of their bodies are fungible. For instance, they can make the muscles in one part of their bodies stronger at the cost of making another weaker, make an arm harder at the cost of making some other body part softer and so on. As the answers to this other question of mine indicate, using this ability effectively in a combat situation is tricky. However, it seems clear that being bigger and stronger at baseline would be an asset (indeed, even if the ability is useless in combat, being bigger and stronger is an asset in combat).
This leads me to wonder whether this "fungibility" ability (say that three times fast) could be used to achieve more height and stockier build, by rearranging the hormones produced by the body starting from the onset of puberty. My (admittedly pretty rough) knowledge of endocrinology and human development is that growth is triggered in part by hormones (notably human growth hormone or HGH), and thus a tweaking of hormone production could have some effect.
Specifically, women with this ability can, at will, change the amount of the various hormones produced in her body, subject to the constraint that she cannot increase overall hormone production through the ability itself, nor produce hormones beyond those normally created by a human female at a given age (so, producing hormones that trigger further hormone production is fair game in principle). To be clear, the idea here is that, given the current level of hormone production in the body at any particular instant, the person can trade, e.g. estrogen for HGH in equal quantities, but can't unilaterally increase HGH.
Assume for simplicity an otherwise normal 10 year-old human female, who has not yet entered puberty and the had the corresponding growth spurt, that they are genetically predisposed to grow up with an average height and build, and will have adequate nutrition to support their growth.
Given these assumptions, is it possible for a woman with this ability to grow larger than she might have by the time she reaches physical maturity? If so, what would be the most likely side effects?
Note that creation of extra muscle mass through this mechanism is not necessary (assume that they are committed enough to build necessary muscle through training and exercise).