Ceres,
Were you evaluated for osteoporosis?
You say your joints are weak? What made you notice this? Was is a change in range of motion? or difficulty moving, lifting, reaching?
I know personally, I get that same feeling of "loose dangly" joints when I am on prednisone.
What genetic predisposition is your doc talking about?
Look forward to hearing from you soon.
Keep at that tennis!
Sincerely,
Erin