[scp3125]

You are incorrect. There is a consensus among scientists who study this subject that /skeletal/ muscle mass is directly associated with bone density. There are specific arguments and disagreements about what exercise is most beneficial for increasing overall skeletal muscle mass index efficiently, but the relationship between skeletal muscle mass, blood flow and nutrient distributions, the downstream effects on hormone regulation systems, and how all of those improve bone density are very well studied.

[jplusequalt]

Neither you or the above commenter have provided sources.

[fatfingerd]

AFAIK resistance training would beat aerobic sport (for this problem); the correlation is right in the headline.

https://pubmed.ncbi.nlm.nih.gov/31797417/