I'll kick in a vote for doing your own continuous research and doing what works best for you. Osteoporosis runs in my family, but my heart is strong enough to do marathons.(but I can't ...) I was very active as a younger person, with tennis, basketball, bicycling, and could bench press 100 pounds. (may be why my knees are shot now ...)

I'm on estrace, which is synthetic estrogen; I wouldn't take premarin because of the torturing pregnant mares thing. It works to even out severe mood swings which were causing me a lot of trouble. You have to take calcium, AND do weight bearing exercise, AND have a supply of estrogen to be laying down bone. For those of us whose joints are going this can be difficult. I am VERY glad I have great bones from my youth.

As far as lyrics go, this one says it all:

How do I know my youth is all spent?
My get up and go has got up and went;
But in spite of it all, I'm able to grin,
To think of some places my get-up has been.

As a dear friend for whom the tide is going out said last weekend: If you have lived, you needn't fear death.