This Lora creates muscular women for realistic models. It should work with most realistic and semi-realistic Illustrious and Pony based models.
Update:
added Illustrious version
This version should work better then the Pony version.
Trigger: big-mscl
Recommended prompt: big-mscl, muscular female, big muscles, abs,
Strength: 1.0
use Adetailer or Highres fix in case the face looks not good