Actress Courteney Cox, who earlier used to practice Pilates for fitness, is now working out using a cross-trainer machine thanks to her friend Jennifer Aniston.

Cox says her "Friends" co-star got her hooked on working out using a cross-trainer machine at the gym.

Contactmusic.com reports that Cox told Britain's Marie Claire magazine: "I did Pilates three times a week until recently, when I tripped and broke my fall with my bony little wrist.

"It meant I needed two operations and couldn't exercise for about three months. Jen turned me on to used an elliptical trainer to work out with, so I now use that too."