For years, Mark Jenkins was the trainer who kept hip-hop in shape.

In the 2000s, he trained Mary J. Blige, D’Angelo, LL Cool, and even Beyoncé. Most notably, he helped Bad Boys Records founder Sean “P. Diddy” Combs’ shed some of his party-going antics to lock in and get his body in shape within six weeks to run the 2003 New York City marathon.

In his own words, he shares how Diddy brought generations of Black men to their feet.