It is no mystery to anyone who reads this blog that (a) I think lower body submissions may be even more effective than their upper body counterparts, (b) I greatly dislike the traditionally negative (and sometimes even disdainful) attitude towards leg locks in jiu jitsu (even among many, if not most, black belts), and (c) I think that most of the reasons proffered for the illegality of some techniques (e.g., reaping) are post-hoc rationalizations rooted in conservatism more than anything else. The safety canard, for instance, is based on fiction rather than fact—something I hope to show soon with the data set I just collected involving nearly 900 BJJ practitioners from around the world (see here). For now, I thought I would just focus on the rule sets regarding leg locks from five national or regional grappling organizations—namely, IBJJF, US Grappling, Grapplers Quest, NAGA, and New Breed. Moreover, for present purposes, I will only be focusing on rules for adults since the rules get even more complicated when kids are involved. That said, let’s get started! The rule sets plus my commentary are below the fold!