Cameron Diaz: Fitness Fun in the Big Apple!

Cameron Diaz heads to the gym with her personal trainer on Tuesday (August 27) in New York City.

The 39-year-old actress showed off her fit figure in a white top and black spandex workout pants. Later in the day, she changed into a casual outfit to shop at the Stella McCartney store in Soho.

PHOTOS: Check out the latest pics of Cameron Diaz

Cameron is no stranger to the fitness world and she will soon be writing a book about health and wellness. The book will offer advice to young women about health, fitness, nutrition and general well-being. It looks like her training has paid off!

FYI: Cameron is carrying a Reed Krakoff gym bag.

15+ pictures inside of Cameron Diaz at the gym…