Wow. Another reason to stay active. This summer I started a program called "Hinge" that my insurance company has been promoting - I'm up to the full 15 minutes of guided exercises, aimed at leg strength but with the side effect of strengthening all of me. And doing it every day is probably something I need to stick with - the gym still doesn't feel like a safe place to go workout and breathe hard several days a week.

Weight-bearing exercises for senior citizens are a good idea, but you start gradually and have someone monitor your work. This may be one reason why.