Research on effectiveness of weight and resistance training for building bone

Research related to bone density is being done not only by physicians, but also people working in the nutrition and fitness fields.  The study populations are usually restricted to one of three groups: pre-menopausal women, post-menopausal women, and men.  Many studies support the idea that weight and resistance training (high load, low reps) can make a difference in as little as six months.  Even if there is not clear improvement, the treatment group is more likely to hold steady instead of losing bone density during the study period.  Most studies last less than two years.  Below are a few examples.

Effects or high-intensity resistance and bone mineral density and muscle strength or 40-50-year-old women
Journal of Sports Medicine and Physical Fitness, 1997, Vol. 37, Num. 4, pp. 246-251.  Authors at UNC-Chapel Hill in the Dept. of Physical Education, Radiology, and Nutrition

Systematic strength training as a model of therapeutic intervention. A controlled trial in postmenopausal women with osteopenia
Am J Phys Med Rehabil., 1996, Jan-Feb;75(1):21-8.  Authors at the Department of Sports and Performance Medicine/Internal Medicine IV, University of Vienna, Austria.

Effectiveness of resistance training or jumping-exercise to increase bone mineral density in men with low bone mass: A 12-month randomized, clinical trial
The Bone Journal, Oct 2015, Vol. 79, pp. 203-212.  Authors at Univ. of Missouri in the Dept. of Nutrition and Exercise Physiology.