Drugs aid in recovery and promote the rebuilding of tissue so long as sufficient calories and rest are taken. There is nothing secret about it. It's the drugs. When you have tiny women take a shitload of male hormones and food along with exercise and rest they get larger and stronger than many many who do nothing.
There was an East German woman Olympic competitor who was so masculine after years of steroids that she decided she was a man. I believe the creature even married a woman. Disgusting. She claimed she and other female competitors were forced by the East German government to take steroids with the goal being Gold Medals.
All things being equal, the person, male of female that takes dem dare stayroids is going to wind up be larger and stronger than those that do not take 'em.