And as athletes have realized that we're perfectly suited for ultra-endurance, they've taken on feats that would have been unthinkable before, athletes like Spanish endurance racer Kílian Jornet.
Y como los atletas han notado que somos perfectamente adecuados para la ultraresistencia, han realizado hazañas que antes hubieran sido impensables, atletas como el corredor de resistencia español Kilian Jornet.