Bradley Bates, 14, has a powerlifting national championship to his name already and is ranked No. 1 in the U.S. for CrossFit in his age group.

Where will it be built? In just a few days, Forsyth County teen David Bradley will travel across the country to compete in the largest CrossFit competition in the world, the Reebok CrossFit Games.

Teens at the Juvenile Residential Center are put through the paces of lunges back and forth across the gym. Three afternoons ...