ATTENTION MILERS! Leo Manzano, the 2012 Olympic Silver Medalist at 1500 meters, gives one of the most important routines of his career …. his pre-race warm up drills. Leo has been doing these drills over the last few years before ever race and workout. Manzano sights significant improvement in his hip flexors, gluts and hamstring health since focusing on doing these drills the proper way. There are about 15 exercises in this routine.