Work Out New York invites viewers to break a sweat with some of New York City's hottest personal trainers. They may be friends, but these high-end fitness experts compete against each other to earn the business of wealthy patrons and celebrity clientele. With training techniques and fitness regimens constantly evolving, these trainers better shape up or risk losing their clients to their competitors. Romances, jealousies, and bitter rivalries provide the ultimate test of endurance for these fitness fanatics.