Do you play tennis, squash maybe even pickle ball? There are many great and fun hobbies but that does not mean it translates to better BJJ. "But I heard it's good for hand eye coordination?" It doesn't help when someone is sitting on your chest crushing you into submission. Now if you have played Rugby or American Football and have spent years tackling people to the ground and holding them there- this is a translatable skill that will definitely help your take down game. JT goes on a tear with this one folks, whatever you do don't mention pickleball!