Zhong Lou’s path to MMA prominence was never in doubt. He started practicing karate not long after he learned to walk and talk and has mastered a strikingly diverse number of disciplines, from Chinese acrobatics to Mongolian wrestling, since. Forty years later Lou is determined to leave a legacy with his San Francisco gym, Dragon House MMA. The money to keep it up and running is not easy to come by, and it’s not unheard of for a student to sweep the floors in exchange for training. But the bottom line for Luo is human transformation, and in that he is making a tidy profit.Lessons:    1.    Even in solitary endeavors, mastery often requires a team effort.    2.    When money isn’t quite cutting it, passion will keep the doors open.    3.    Fitness priorities shift with age; training for invincibility while young must gradually shift to training for health if one is to remain viable.