Legs

I think I was listening to John Danaher, who said one of the hardest transitions for people when beginning BJJ is moving from using their arms as a primary means of performing tasks to using their legs. It makes a lot of sense, as most situations in life require your feet on the ground, leaving only your arms to do things. In Jiu-Jitsu however, your legs become an asset for distance management and control. As legs are longer, stronger, and further away from your face, they are an efficient first line of defense from a supine position. When you combine these qualities of your legs with gripping techniques, holding guard becomes easier.