A great MMA boxing coach has to strip away the "pure" boxing habits that get people killed in the cage.
High, tight "peek-a-boo" guards work with big 10oz or 12oz gloves. In 4oz MMA gloves, punches fly right through the gaps. The coach teaches "hand fighting" and long guards instead. mmaboxingcoach
Traditional boxing stances are often too side-on. A coach has to square the fighter up slightly to allow for sprawl (takedown defense) and to check leg kicks. A great MMA boxing coach has to strip