 Complete the following phrase:  Bartolina improved her marks in pole vault, when she finished ninth at the U.S. Olympic Trials in 2004, and fourth at the U.S. Indoor Championships in 2005. Shortly after the championships, Bartolina took a year off from pole vault, when she suffered a severe back injury from training at Texas AM University. In 2008, she came out of recovery from injury, and competed at the 