Track star Lolo Jones suffered disappointments at the past two Olympics. In Beijing, she was in position to win gold in the 100 meter hurdles but tripped on the second-to-last hurdle. In London, she finished fourth.

Desperate -- her words, not ours -- to win an Olympic medal, Jones has shifted her focus to the 2014 Olympics as a bobsledder.

The early results are encouraging. She helped the U.S. national team win an event in Switzerland in late January.

HBO's "Real Sports" has an in-depth feature on Jones and her quest for Olympic hardware in its latest edition that premieres 10 p.m. ET/PT Tuesday. Here is a snippet: