That's when you start questioning the "might" in that statement about genetic makeup as much as the idea of somehow circumventing the effects of hormones on physical strength.

Amplifying the signal in degraded ancient DNA is notorious for just as often creating a lot of indecipherable noise. As someone noted in another comment, the sample tested was too badly degraded for any of the proven analytical techniques to work on, and they had to make up a new way of interpreting the data, and just so happened to get an implausibly unlikely but politically topical answer and got themselves published.