Yoga Fan Jennifer Aniston

Jennifer Aniston says yoga changed her life.

The former 'Friends' star appears in the introduction to 'Yogalosophy', a new workout DVD fronted by her friend and yoga instructor Mandy Ingber, and says she was amazed at the impact learning the discipline had on her.

In the short clip, she says: "She brought yoga into my life. It completely changed my life.

"It's one of the most fun workouts I've ever had. So have fun and work hard because it will totally pay off."

It was recently claimed that Jennifer, 40, flew Mandy from Los Angeles to New York to help her get in shape when playing a younger woman in 'The Bounty'.

A source said: "Jennifer has had a totally overhaul for this film. She wants to be seriously fit, yet remain curvy.

"There are a lot of early starts on set, so she has had to get up at 3am to get two hours in the gym before filming at 5am. She is supposed to be playing a 35-year-old, and is concerned she won't look the part now she is 40.

"It hasn't been easy, but she has combined one-on-one yoga sessions with gruelling weight and workout sessions. Her new body is the talk of the set and she is revelling in the attention. Everyone agrees that Jennifer is looking sensational at the moment. Her curves have definitely been noticed - she is glowing."