50 Cent has been staying on the entrepreneurial grind, launching his Street King initiative and SMS Audio headphones. Now, he’s once again focusing on his publishing career, announcing the release of his fitness book Formula 50: A 6-Week Total Body Transformation Plan.

According to a press release, the book focuses on metabolic resistance training (MRT), a medium between cardio and muscle building. It also offers nutritional advice and “helps readers develop the mental toughness and motivation to stick with the plan.”

“I am delighted to work with the Penguin Group USA again. I had a strong desire to write this book because is very important to me to help people make positive changes and take charge of their overall health. FORMULA 50 is a radical six week mind-body transformation plan geared to help readers develop mental toughness to achieve optimum results while offering a nutrition component,” said Fif.

Formula 50 is scheduled for release in January 2013 via Avery Books.