Former British marathon runner welcomes FINA's transgender swimmer guidelines: 'They've upheld fairness'

Runner Mara Yamauchi responds to statement from FINA regarding transgender swimmers after college swimming faces backlash over allowing Lia Thomas to compete with women

Former elite marathon runner Mara Yamauchi said on "Fox & Friends First" Tuesday she welcomes the decision by the international swimming governing body to create new guidelines for transgender athletes. 

"They've (FINA) upheld and enforced fairness for female swimmers and female athletes in the other sports, which we know covers diving, water polo, etc. and I welcome this decision," she said, referring to the International Swimming Federation. 

LIA THOMAS COMPETITOR TOUTS FINA RESTRICTING TRANSGENDER ATHLETES: ‘STEP IN THE RIGHT DIRECTION’

A logo of the is the international governing body of swimming, diving, water polo, synchronized swimming and open water swimming, FINA is displayed during the FINA World Championships in Rome on July 25, 2009.  (MARTIN BUREAU/AFP via Getty Images)

FINA faced backlash over the new "gender inclusion policy" that was approved Sunday setting the standard for transgender athletes’ participation in the sport.

The "gender inclusion policy" will only permit swimmers who transitioned before the age of 12 to compete in women’s events. FINA members voted 71.5% in favor of the new policies. There was also a proposal for a new "open competition policy." The organization said it was setting up "a new working group that will spend the next six months looking at the most effective ways to set up this new category."

In the 24-page policy released Sunday, FINA spelled out how transgender men and women will be allowed to compete under the new rules.

The British former marathoner applauded the decision and said it is "unfair" for