Hi there -
Can you be a bit more specific about what you'd like to track? For example, do you get bone density tests every few months? Are you looking for something very specific? A certain condition, such as osteoporosis?
If you are getting bone density tests yearly, you might try our Personal Health record for that - http://www.medhelp.org/land/health-records If
it's something more, or more specific, please let us know.