A lot of beginners and not only them thinking Yoga is not for Brazilian Jiu-Jitsu or any Martial Arts as well. Some people thinking its not for big, strong and brutal guys! But they mistake a lot! Its depends on your level, when you growing up you start realize for your progressing you need to change something, like a flexibility, balance, breath control, body (muscle) control, get a better focused mind, all of this aspects can be fixed and level up with Yoga! As soon as early you start practice it, better for you on your BJJ journey. 
Yoga is available for everyone, young and old, man and women, everyone can find yourself in it!
Regular practice is good for body and mind!
1. It’s a chance to take time for yourself.
2. The ability to improve your body tone.
3. Yoga develops body flexibility.
4. Yoga improves breathing.
5. Yoga fights stress.
6. Improves posture.
7. Reduces pain.comfort.
8. Improves digestion (twisting poses).
9. Strengthens the joints.
10. Helps fight depression.
Yoga softens muscles, improves balance, energizes, and is great for joint development. In short, it is very useful for body and spirit, so do not delay getting acquainted with this practice!