Vital statistics

Megan McCarthy-Cook, 33, Hoffman Estates

Height: 5 feet, 6 inches

Starting weight: 282

Body fat: 48 percent

BMI: 46.9

Body age: 41

Marianne Costales-Roman, 37, Carol Stream

Height: 5 feet, 2 inches

Starting weight: 222

Body fat: 44 percent

BMI: 41.1

Body age: 50

Karen Castillo, 36, Carpentersville

Height: 5 feet, 4 inches

Starting weight: 206

Body fat: 40 percent

BMI: 36.5

Body age: 43

Joe Gundling, 18, Hanover Park

Height: 5 feet, 7 inches

Starting weight: 264

Body fat: 38 percent

BMI: 40.3

Body age: 30

Greg Moehrlin, 39, St. Charles

Height: 6 feet

Starting weight: 245

Body fat: 33 percent

BMI: 33.2

Body age: 50

Mike Paulo, 58, Woodridge

Height: 6 feet

Starting weight: 294

Body fat: 39 percent

BMI: 42.9

Body age: 70