Knock It Out!

Four contenders compete for the best prize of all—their health, and a set of fantastic prizes, including a trip for 2 to and overseas spa, a year of personal training, and nautilus equipment. Over the next six months, each will compete to lose the greatest percentage of body fat.

Yannick, 28, is an adjunct professor in Wayne, NJ.

Derek, 40, is a flight attendant and lives in Jersey City, NJ.

Caprice, 33, is an opera singer and stay-at-home mom living in Inwood, NY.

Troy, 22, is a paralegal for a law firm in Boston, Mass.