But for episode one, I will be talking about the concept of inside channel. And the inside channel is probably, if not the most important concept in Jiujitsu. It's one of the top three concepts in Jujitsu and the inside channel is basically the space between your armpits and your waist. Generally speaking, some would also argue the space between one's legs is the inside channel as well. But you are essentially fighting to try and get to the space between your opponent's armpit and their leg