Matthias Schlitte is a German professional arm-wrestler. He was born with a genetic bone disorder that made his right arm naturally larger than his left. His training objective is to build as much strength and muscle mass as possible in his larger arm, but keep the rest of his body (including his left arm) relatively trim, so he can compete in a lighter weight class. In the gym, he develops his right arm twelve hours a week.
All humans are on a journey of maturation. We continue to grow throughout our lives, hopefully until the day we die. I’ve found that these journeys are not linear. Much like Matthias, we develop asymmetrically.