I want to verify through a statistical study on the population how much the standard deviation varies compared to populations that have never done physical exercises of strength, the value t-score in BMD in the results of DEXA
I suggest to start with studying this meta analysis of the effect of physical excercise on osteoporosis
Article Osteoporosis and the Role of Physical Therapy in the Different Domains
It's an incomplete research question which you have raised here. One has to define age, gender, drug intake and various socio-economic features of the population groups you plan to study for prevention/treatment of osteoporosis, and not just physical activity, as all these are major confounding variables.
Otherwise, the research question will be invalid as you might end up "comparing apples with oranges".
As about availability of studies on this topic, just do a search in Pubmed with same keywords, there are scores of studies done (screenshot of such a search attached). Choose at leisure whatever suits you!
1. Watson SL, Weeks BK, Weis L, Horan SA, and Beck BR. (2018). High-Intensity Resistance and Impact Training Improves Bone Mineral Density and Physical Function in Postmenopausal Women With Osteopenia and Osteoporosis: The LIFTMOR Randomized Controlled Trial. Journal Bone Mineral Research 33(2):211-220
2. Watson SL, Weeks BK, Weis L, Horan SA, and Beck BR (2015) Heavy resistance training is safe and improves bone, function and stature in postmenopausal women with low to very low bone mass: Novel early findings from the LIFTMOR trial. Osteoporosis International, 26 (12) 2885-2894.
"Yoga might be an alternative training for the quality of life and balance in postmenopausal osteoporosis."
Tüzün S, Aktas I, Akarirmak U, Sipahi S, Tüzün F.
Eur J Phys Rehabil Med. 2010 Mar;46(1):69-72.
Valentino Manocchio I would love to know how your article collection evolves.
In particular, I believe the focus on "strength training" is very weak in the literature, compared to more general exercise interventions. Specifically, interventions that result in measured myokines and other sarcoblastic / osteoblastic markers.
I believe the standard is very low in terms of what constitutes "heavy" resistance training.
I would consider this to be the "ideal" kind of strength training in terms of benefit per unit time:
https://www.youtube.com/watch?v=Tvq6wxsWiLg
where almost no women anywhere have any experience doing anything even remotely similar to that.
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