Biggest Loser returns for its twelfth season on Tuesday when new trainers Anna Kournikova and Dolvett Quince join the returning Bob Harper at the ranch as they try to help a new batch of contestants lose weight and transform their lives.
These new clips released by NBC show former tennis star and certified trainer Kournikova and fitness expert Quince coming face-to-face with the contestants for the first time, and offer a glimpse at what we can expect from them in the gym.
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