Jane Fonda is to host the first-ever World Fitness Day.

The 72-year-old actress - whose workout videos were a huge hit in the 70s - wants to promote the event in Atlanta's Georgia Dome on May 1 as it stresses the importance of keeping fit.

She said: "I want to show the fun and value of exercise. It can be a determining factor in the quality of your life and it's never too late to start."

Jane says the event is for people of all ages and potential participants shouldn't be put off by past injuries.

She said: "I am 72 years old. I've had hip replacement and a recent knee replacement and I am interested in bringing boomers and seniors like me into the exercise world because I know it will enhance their lives."

More than 3,000 participants will have the opportunity to sign-up for work-out sessions which range from aerobics with Richard Simmons to tae-bo with Billy Blanks while the event will also be available live online via ustream.tv.

As well as regular exercise, Last year Jane revealed one of the reasons she still looks good is because of her sex life.

She laughed: "I physically don't feel so good since I'm in pain. But I'm happier, the sex is better and I understand life better. I don't want to be young again.

"How do I still look good? I owe 30 per cent to my genes, 30 per cent good sex, 30 per cent are because of sports and healthy lifestyle with proper nutrition and for the remaining ten per cent I've to thank my plastic surgeon."