Caitlyn Bobb continued her assault on the record books on her debut at the NCAA Championships in Eugene, Oregon.

The University of Maryland Baltimore County freshman broke her own national and school records in the 400 metres at the University of Oregon on Thursday.

Bobb finished seventh in her semi-final heat in 51.84sec and ended her debut season in college athletics in the United States with the seventeenth-fastest time in the nation.

“It was definitely exciting just to get out there and run the 51,” Bobb told The Royal Gazette.

“The girls there are running 50, 51 on a regular basis. Just going out there running with them, staying and keeping up with them was an accomplishment.”

The sprinter missed out on the final as only the two finishers in each of three heats plus the two fastest losers advanced.

“I wanted to get first or second; that would have been cool,” Bobb added. “But being realistic we are just running for time at that point, so I just ran my race that I practised and, staying in the mix, I was able to achieve a 51.

It is the second time in as many outings that Bobb improved on her personal best — and by extension her national and school records — having also achieved the feat at the NCAA Track and Field East Preliminary Round at the University of Indiana last month.