HAVANA, CUBA - MAY 08:  Two young boxers fight each other at Rafael Trejo Boxing Gym on May 8, 2015 in Havana, Cuba.  The Rafael Trejo Boxing Gym is probably the most famous gym in Havana. Kids from all over the city work out there with great trainers, some of whom are former Olympic champions. The gym also hosts competitions for different age groups throughout the month. 
Although baseball is known as the national sport of Cuba, boxing in the sport where they have achieved the greatest dominance at the Olympic Games. Since the 1968 Games, Cuba has won a total of 53 medals, and 33 of those have been gold medals Ñ no other country is even close to those numbers.  Boxing starts as early as eight-years old for boys in Cuba. Boys usually start out at a local gyms near their home. If they succeed at that gym, they are offered a spot at one of the boxing academies that are in each province around Cuba.  From there, the best fighters are selected to go work out at the Junior National team training center, and if they are lucky enough, they are then picked for the National team Ñ where there are only 12 spots available to represent their country at the Olympics.  (Photo by Ezra Shaw/Getty Images)