I’ve said it before, and I’ll say it again — the right exercise routine for you is the one you want to do. Someone who proves my point is actor Julie Andrews, 90, who shared the simple workout routine she does "most days" to stay in shape.Staying active as we get older is essential for longevity, balance, and fall prevention. Simple resistance training, even using just your body weight, can help slow and even reverse the muscle loss that comes with aging. This can help build the functional power you need to complete daily tasks, such as standing up from a chair or carrying a bag of groceries.What is Julie Andrews’ go-to workout? Two years ago, the "Sound of Music" star told Yahoo Life: “I have all my life worked out first thing in the morning or something like that — a little less so these days.” She shared that her routine consisted of 30 minutes of yoga and ballet. Telling Woman & Home in 2000, "I work out as little as I can for as much gain as I can. Yoga and a little bit of ballet — only 30 or 40 minutes every other day. I keep supple for myself more than for roles."Along with this, walking has always been part of the actor’s fitness regime: "I was trying to get myself ready for a stint at the London Palladium. And I knew I needed more energy than I could possibly muster. So I decided to go for brisk walks every day. And I started to walk up to the farm and around because there are many hills and steep inclines, and that really gets the legs strong," she told Theatre Week in 1993.