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Billy Blanks - Billy Blanks is a former martial arts action star turned fitness trainer. He invented the Tae Bo exercise program in Boston by combining elements of boxing and martial arts. (Photo: Koichi Kamoshida/Getty Images)

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Jeannette Jenkins - Trainer Jeanette Jenkins has worked with Queen Latifah, Terrell Owens and Tia Mowry. She is also the spokeperson for BET's A Healthy BET Campaign. (Photo: Jason Kempin/Getty Images)

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Michelle Obama - First lady Michelle Obama is not only the wife of the first African-American President, she is also a lawyer, author and fitness expert. She runs a campaign against childhood obesity called Let's Move.  (Photo: AP Photo/Manuel Balce Ceneta, File)

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LL Cool J - Rapper LL Cool J has been showing off his well toned body for nearly thirty years. LL currently has an advice column in Men's Fitness magazine. (Photo: Peter Kramer/Getty Images)

Photo By Photo: Peter Kramer/Getty Images

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Sean T - Sean T is a New Jersey born choreographer and fitness trainer. He is known for his Insanity and Hip Hop abs fitness programs. (Photo: Shaun T/Facebook)

Photo By Photo: Shaun T/Facebook

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A.J. Johnson - A.J. Johnson is an actress, dancer and fitness trainer. She is well known for her roles as Sharane in House Party and as Jodi's mom in Baby Boy. She was also the host of VH-1's From Flab to Fab. (Photo: A.J. Johnson/Facebook)

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Rosa Acosta - Rosa Acosta may be know for her appearances in music video and men's magazines, but she got her start with a stretching video. Though the video was intended as an instructional video for women, most of its watchers were men. (Photo: Johnny Louis/WENN.com)

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Angela Bassett - Actress Angela Bassett first got noticed for her physique in the Tina Turner biopic What's Love Got to Do With It, where she replicated the singer's trademark arms and legs. (Photo: Stephen Lovekin/Getty Images)

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Tina Turner - Singer Tina Turner recently appeared on the cover of German Vogue at age 73, showing that good genes, daily exercise and a good diet can defeat the aging process. (Photo: Vittorio Zunino Celotto/Getty Images)

Photo By Photo: Vittorio Zunino Celotto/Getty Images

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Serena Williams - Serena Williams is possibly the best female athlete of all time. She combines speed and strength with grace and agility. Whatever she is doing to work out is sure working.  (Photo: Scott Barbour/Getty Images)

Photo By Photo: Scott Barbour/Getty Images

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Usain Bolt - It takes a lot of exercise to become the fastest man in the world and Usain Bolt is not afraid to put in that work. Bolt's dedication to training is only rivaled by his upbeat laid back personality. (Photo: Michael Steele/Getty Images)

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Shelly-Ann Fraser - Shelly Ann Fraser is the fastest woman in the world and has won two gold medals. The Jamaica native's dedication and determination to her body and her sport makes her an excellent fitness expert. (Photo: Stu Forster/Getty Images)

Photo By Photo: Stu Forster/Getty Images