>> hi, my name is brianna. >> hi, i'm natasha. >> hi, my name is anthony. >> we will run them through a series of physical challenges. >> this way, follow me. >> led by a personal trainer who will emphasize that they need to do well or they're out. >> if you cannot do better than 30 seconds, you're probably not gonna make it. >> what they don't know is we've rigged the gym with hidden cameras and planted an actress in the group to cheat. >> hi, my name is lauren. >> despite what we've heard about how common cheating is, this dad is confident his son, anthony, would never do it. >> he is a good student. he is very athletic. he is very competitive. >> does he play by the rules? >> 100%. he plays by the rules and i think today, he will get upset if he finds someone cheat egg. >> brianna's mom says her daughter has a strong moral compass. >> she does struggle with peer pressure a lot, like most children her age. >> peer pressure situation where perhaps others are goading her to cheat, how do you think she may respond?