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It works though: A 2015 study showed that consistent resistance training over six months led to significant improvements in bone mineral density in the lumbar spine, particularly in postmenopausal women.

We hit peak bone mineral density in our late teens and early 20s, when our body has grown to full size and our metabolism is working its best.

Low bone mineral density – especially in the spine – puts people with anorexia at increased risk of fractures because their bone thickness is reduced, increasing the likelihood of developing osteoporosis, which is associated with increased fractures.

On a six-month journey, the astronauts that went up there lost 1.5 percent of their bone mineral density per month.

“Medical providers generally aim to limit the number of years of treatment with puberty blockers due to the risk of lower bone mineral density and vitamin D deficiency,” the plaintiffs wrote, adding that the ban on hormone therapy will force young people to make a choice between the potential “negative consequences of prolonged puberty-blocking therapy,” or stopping the medication and going through puberty.