It is sometimes called the silent disease because there are no symptoms until the first broken bone. Even a slight blow or falling or lifting an object that normally wouldn't cause a bruise can cause a break. Testing is now available to assess your level of bone loss and medications to increase your bone mass are also now available. As you can see, a lot happens as we age. But the time table is not written in stone.
Exercise does amazing things at even the latest stages of life.
We do have control over much of our lifestyle and, hopefully, can influence those we care about in assessing the impact of smoking, drinking, stress, nutrition and exercise and work together to create a healthy time table for as long as possible.