As a personal trainer to the stars, Mark Jenkins has worked with such high-profile clients as Mary J. Blige, Beyoncé, and Missy Elliott. He has received feature profiling in numerous popular magazines, from Muscle & Fitness to the music and entertainment periodical Vibe. Particularly well-known within the black community, trainer Mark Jenkins has appeared in Ebony, Essence, and Jet and has served as a regular columnist for Britain's top black newspaper New Nation.

Mark Jenkins is the author of The Jump Off: 60 Days to a Hip-Hop Hard Body and produced a DVD known as 90-Day Transformation. He released the DVD alongside his proprietary nutritional supplement line, the Pinnacle Work-It Kit, which the public can buy at GNC stores across the United States.

Mr. Jenkins also stands out as founder and co-owner of the personal training company International Fitness, which focuses on training professional performers. He has become a top choice for performing artists seeking a trainer who can get them into top shape quickly and effectively. He balances this work with service as the spokesman for United Way and is the creator of its children's program Fun, Fly & Fit.