What is your DEXA score in your spine? I've read you should avoid twisting movements, which is why I quit golfing as my DEXA is worst in my spine.

I declined Fosamax after reading articles that said bisphosphonates offered minimal benefits as far as fracture prevention. Bisphosphonates slow down the loss of bone but also slow down the formation of new bone. Your DEXA may appear better, but you could have older, more brittle bones. My doctor does not agree with this, but respect my decision to refuse the medication. Here are some articles that may be of interest.

https://www.amjmed.com/article/S0002-9343(24)00101-3/fulltext
https://www.consumerreports.org/cro/2012/04/popular-osteoporosis-drugs-come-with-mounting-concerns/index.htm
If you decide to go ahead with the Fosamax, but are concerned about side effects, my Endocrinologist offered me a prescription for 1/2 the normal dose, which he said would still be effective. You could try that and if you don't have side effects, then consider the normal dose which I believe is 70-75mg/week.

It sounds like you are already physically active, but check out Brick House Bones on Facebook for great free exercise videos by a PT who specialized in osteoporosis. Also, search this support group and read about studies showing high doses of Vitamin K in the forms of MK-4 and MK-7 have been shown helpful when taken with calcium supplements, to direct the calcium to your bones. Boron is good and it's suggested to eat 5-6 prunes a day to add boron to your diet. Also, collagen supplements containing Fortibone have been shown to help with BMD.