When ONE Championship makes its U.S. debut on May 5 in Broomfield, Colorado, the athletes must deal with the mile-high elevation. It will be an added element into the preparation athletes have to be aware of, and Demetrious Johnson is already taking it into account. “Mighty Mouse” will be defending the ONE Flyweight World Championship against Adriano Moraes at ONE on Prime Video 10.
Johnson is still deciding if he should go to Colorado early to acclimate to the conditions. Johnson does have experience competing at altitude.