Dynamic Aging is the title of a book by Katy Bowman, a movement expert. It is filled with good exercises to keep us limber and moving well as we age, including working on balance and joint mobility, and practicing walking on uneven surfaces. These are easy to do at home with little or no equipment. I was already doing the equivalent of some of these, for example in my stretching routine, but I definitely picked up some good tips, like using a tennis ball to keep feet flexible.
The other thing I liked about the book is that Katy collaborated with some of her students, three women in their 70s, to provide commentary on how this program has helped them, which I found inspirational. I definitely recommend this book.
Katy also writes a blog with interesting essays on movement at https://www.nutritiousmovement.com/blog/. A recent post describes why calf raises are good for your heart (by helping with peripheral circulation via “venous return”) as shown in the figure: