Yoga invariably helps your Jiu-Jitsu game. Yoga is ultimately the art of moving through positions in a controlled and conscious manner. It involves a high degree of stretching throughout and depending on the style of Yoga, you'll target plenty of muscle groups through all the different exercises throughout your practice. Yoga is a great way to open up your tight chest, rigid spine, and even muscles in your head. The neck and spine in Jiu-Jitsu take quite a beating and overtime tightness can cause longer-term issues. By regularly stretching through a Yoga practice you can alleviate these problems. As you'll know, the head, neck, spine, and chest are critical to a good Jiu-Jitsu game.