 Complete the following phrase:  Mejía took up cycling at the age of 16, after watching Lucho Herrera, Fabio Parra and Óscar Vargas racing in the Vuelta a Colombia. He had previously competed in football and athletics, having been national junior champion for the 10,000 metres. In 1988 he won the Under-23 Vuelta a Colombia and the Clásico RCN. He won the young rider classification in the 1991 Tour de France and finished fourth at the 