'Bulltrain', el método de entrenamiento mental y físico que toma vigencia en Medellín

An athlete takes part in a routine of bulltrain, a new system of physical training, in Medellin, Antioquia department, Colombia on July 12, 2015. Recycled tires and tree logs of different sizes and weights are used in bulltrain. AFP PHOTO / Raul ARBOLEDA