Protein and Muscle Building for BJJ – A Quick Guide for BJJ
No, jiu jitsu alone does not build muscle in the sense that pure weight lifting does.
Diet
How Many Calories Does Jiu Jitsu Burn? A Quick BJJ Weight Loss Guide
On average the basic bjj class burned 575 calories and an advanced bjj class (more sparring*) burned 750 calories for a 190 lb male.