Jennifer Widerstrom is a fitness expert, personal trainer, and television personality best known for her role as a trainer on The Biggest Loser. Born on August 24, 1982, she has dedicated her career to helping people achieve healthier lifestyles through fitness and nutrition.

Before becoming a household name, she was a competitive athlete and later gained recognition as Phoenix on American Gladiators (2008). Her training style combines motivation with science-backed fitness techniques, making her a popular figure in the wellness industry.

Beyond television, Jennifer is an author, fitness model, and motivational speaker, regularly contributing to fitness publications and working as a brand ambassador. She has also been involved in strength training programs and online coaching, inspiring countless people to embrace a fit and active lifestyle.