Keep your knees between you and your opponent: The essence of bottom position in Jiu jitsu is to use your legs as a barrier between you and your opponent. This is what enables smaller, weaker people to wear down and defeat bigger, stronger people – for the legs of a small person are stronger than the arms of a bigger person. Your first instinct in this game when underneath opponents must always be to get your feet knees and hips between you and the other guy. Whenever you're in trouble – retract your knees to chest and face your opponent!
