Do you still lift? I'm pretty into weightlifting and I'd like to add a martial art and BJJ looks like the best fit for me, but I don't want to lose muscle definition.
Most of what I've read about muscle loss is that it happens when you eat at a deficit or don't hit your protein targets.
This video talks about the creators experience balancing BJJ w/ lifting. https://www.reddit.com/r/weightroom/comments/6o8ubw/balancin...
Edit: personally I switched to a 5/3/1 variant for athletes, but plan on going back to a higher volume program soon, after some weight loss.