Jennifer Aniston gives workout tips to Courteney Cox

Actress Courteney Cox says her former

'Friends' co-star Jennifer Aniston gave her a workout tip that proved very effective.

The 49-year-old actress once had a problem with selecting some workout machine, which Aniston solved for her, reported Contactmusic.

"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," Cox said.

"Jen turned me on to used an elliptical trainer to work out with, so I now use that too," she added.