-, my personal choice would be Forteo over Evenity. Evenity is a medication that she should consider, because it lays down new bone fastest.
I think from your posts that you understand the differences between the bone from Forteo use, because it is the most similar to Tymlos-bone than Evenity-bone. It is remodeled bone as opposed to modeled bone. Restorative, integrated, more flexible articulated by communication channels. The pth 1-34 drugs restore the missing architecture creating the chondrocyte structure needed for calcium attachment, reforming spicules that make up trabecular bone.
Evenity bone is lost more quickly than most of the osteoporosis medications if not followed by another medication,
I haven't taken Evenity. Relying on our friends scribing here, almost everyone has a weighty increase in bone density with Evenity, many have arm swelling (it is actually two injection, on in each arm), most have joint and bone pain. Some are miserable, some are quite pleased. Read the package insert notably the black box warning about increased risk of cardiac events in some.
The impact of running places the most stress on the areas where she is most vulnerable. I don't know any runners who are willing to quit running, but she may be to avoid running on hard surfaces.
We have wider range of flexibility at L4-5 than at L3-4. At L3-4 she is at most risk of fracture in flexion and extension, the the forward and backward movement. It's clever to avoid exercises in the sagital plane until whichever medication increases strength at L3-4.
You'll want to do all of the lifting, heavy lifting for the next year.
NJX you must be almost at the end of your Tymlos run. Have you decided on a follow-up drug. I'm 2 years 7 months on Forteo and love the drug, hoping to stay on it endlessly.
Don't let her fracture. Best wishes.