Everyone I know over 80 does some sort of exercise, some sort of movement during the day. A very significant study was done that showed walking was a very common exercise for those who lived into their 80’s and 90’s, and the study concluded walking and other exercise that was not necessarily raising your heart rate very much was all that was necessary. It makes sense to me. The Chinese do that slow type of morning exercise (I don’t remember the name of it) and many of them walk in the cities, bicycle, or do physical work and they live long lives.