Jennifer or Jen Widerstrom is an American fitness model, author and a certified fitness trainer. She is famously known for being a trainer in the hit television series, “The Biggest Loser“, which aired on NBC. Moreover, she also starred as a female gladiator in the show, American Gladiators in 2008. More recently in 2015, she appeared in the documentary, “Why Am I So Fat?”. Jen has also worked as a life coach with MSN.com and...