First experiment to make something for Flux. Its janky, its unreliable, but its working most of the time. I'll probably update and improve this with time, so if you have any good observations or suggestions, comment it here

Theres no specific trigger word, but stull like "very muscular" "with large muscles" and such helps. Mostly aimed at making musclegirls but works for men too

Oh btw, I made an image creation bounty for this:
https://civitai.com/bounties/3994/muscle-up-movie-heroines