Jennifer Widerstrom

Jennifer Widerstrom (born August 24, 1982) is an American fitness model and personal trainer. She appears as a trainer on the American version of the television series ''The Biggest Loser'', replacing Jillian Michaels. She also appeared on American Gladiators, as the female gladiator Phoenix, in 2008 for its second season.

She also appeared in the 2015 documentary titled ''Why Am I So Fat?'' Provided by Wikipedia