Check out this really interesting article by Sports and Exercise expert and Alliance Black Belt Roger Brooking on the physiological needs of Jiu-Jitsu
http://brooking-roger.wix.com/ptsc#!Qualitative-analysis-of-Brazilian-JiuJitsu-What-the-science-is-telling-us-about-the-physiological-needs-for-BJJ/c1961/55033b080cf2458597baf31a
Kid Peligro Iphone App Secrets of the Closed Guard
Kid Peligro Iphone App: Portuguese For BJJ
http://brooking-roger.wix.com/ptsc#!Qualitative-analysis-of-Brazilian-JiuJitsu-What-the-science-is-telling-us-about-the-physiological-needs-for-BJJ/c1961/55033b080cf2458597baf31a
Kid Peligro Iphone App: Portuguese For BJJ