Gianni Grippo on Drilling, Studying & Mental Training for Jiu-Jitsu

Gianni Grippo is a machine! He eats, sleeps and breathes jiu-jitsu. 

In this +30-minute interview he opens up about his crazy training routine (how many hours a day on the mat?), how he chooses which techniques to work on, and how mental training and visualization has become a key component of his preparation.