Celebrity trainer Corey Calliet calls himself the "Body Transformation Specialist." The successful fitness guru has made a name for himself in Hollywood as one of the most well-known trainers in the industry.

Calliet sits down with Alyssa Julya Smith in Los Angeles to talk about working with some of Hollywood's biggest stars and how he got his start in the industry. Calliet credits much of his success to Micahel B. Jordan, who he trained for the film "Creed."

He describes taking Jordan from having very little muscular endurance to extreme fitness. Calliet also discusses working on "Revenge Body with Khloe Kardashian" and his experience with the famous reality star. He describes the mental transformation that goes along with the physical one when focusing on a person's fitness and health.

Calliet is also a huge advocate for combating childhood obesity and discusses some of his strategies to keeping kids in America fit and healthy.