( CNN ) -- In the 1980s , Jane Fonda was the face of fitness for millions of Americans . `` The Jane Fonda Workout '' became the highest-selling home video ever , with more than a million copies purchased . Since then , Fonda has produced and starred in over 20 home exercise tapes and DVDs . After a 15-year hiatus , the Oscar award-winning actress returned to the fitness field with the goal of helping baby boomers feel better and stay active . Her latest DVD , `` Prime Time : AM/PM Yoga for Beginners , '' releases Tuesday . Fonda turns 75 later this month . We spoke with her Monday about aging , eating and living life abundantly . Q : When you released your first workout tape in 1982 , did you have a sense of how big a phenomenon you were on to ? I did not have a clue . I had no idea . It was pure luck . I did n't realize the role timing would play in the whole thing . There was no video industry . I did n't know anyone who owned a video , because no one could afford the hardware to play a video . And there was no video that beckoned people to do it over and over and over again until that tape came out . That 's what caused the video industry to explode ... it was all very synergistic ... it had no strategic thought on my part . Q : How do you stay motivated ? What motivates me is how good I feel afterwards . ( Laughs ) I do n't wake up saying `` Oh goody , I am going to work out . '' But I do it because of how it makes me feel when it 's over . I feel so good . If I 've felt depressed or down at all , it picks me up and makes me feel great . Q : Do you feel you have to do as much as you did 10 years ago ? Absolutely not , no . I ca n't do what I used to do . My body just would n't tolerate what I used to do . ( Fonda has had hip and knee replacement surgeries . ) The mistake that so many people make is that if they ca n't do what they once did , then they do n't do anything . Big mistake . It 's important just to do something . If you ca n't run , walk . ... If you ca n't lift heavy weights , so lift light weights . But just keep yourself physically active . It makes all the difference not just for your body , but for your brain as well . Q : What do you eat ? I eat fish , chicken and eggs . I eat red meat maybe twice a week . But when you are older , it is very important what you eat because your cells regenerate more slowly and also you put on weight more easily because you have less muscle than you used to , so every single calorie you put in your body has to count for something . I eat by color . I try to eat something dark green , dark purple , red , orange , yellow , white , because they all have different vitamins and minerals in them . Q : What foods do you avoid at all costs ? Well , I am not a purist . I am not perfect . Now that the Christmas holiday is coming , I will take a bite of a pecan pie , but I wo n't eat a whole pecan pie . I will take a few bites of the dressing , but I will eat a lot of the turkey . Turkey meat is so good . I will eat it with cranberry sauce and gravy . But I try to eat less of the very fattening food and more of the really healthy food . Q : What do you think is the secret to a well-lived life ? I think it 's more important to be `` interested '' than to try to be `` interesting . '' I 've always remained interested and curious and I 've always been a student as well as a teacher , so I think that 's key . Also being intentional ... living an intentional life ... thinking about who you are , how you affect other people , how you are perceived in the world and how you can change that to be more positive -- instead of sort of just drifting along like a leaf in the river , being really intentional about how you live . When you do yoga , you can do the poses thinking about the grocery shopping or what you are going to do tomorrow , or you can be intentional ... in the moment , being present in what you are doing . That 's how to get the most out of life and learning . That has been very important to me .
Jane Fonda has directed and starred in more than 100 exercise videos and commercials . Her latest video , on yoga for beginners , releases online . Fonda talks about her approach to staying fit , eating healthy and ` ` being intentional ''