I read a study that if you jump on a hard surface 10 jumps or more per day, it will strengthen your bones. It's like the idea of walking for your bones, but in hyperdrive. Your bones strengthen as a result of "pounding", and jumping provides this. Definitely, do it carefully, holding onto something so you don't fall. In the study they studied people who had significant osteoporosis, and got surprisingly (to them) good results. I never saw any further press on the study or further studies, but it doesn't surprise me as there is no money in it.

My mother had terrible osteoporosis, and I take after her in many ways, so I do it several times a day, when I remember (to make up for the days I may forget.) Also get all of the minerals needed for bones, make and drink bone broth by boiling bones overnight with a little vinegar in the water to help leach the minerals out, and be sure to take a small amount of vitamin K. I can't take the drugs either, and have read that they can make your bones brittle. By my age, my mother had significant "dowagers hump" by, and by 80 in the nursing home would break when they turned her over, while I have reasonably good bones at 61 doing the foregoing. I hope it helps.