A July 2017 study by the University of Exeter found that, “A single minute of exercise each day is linked to better bone health in women, new research shows.” The researchers found that, “those who did "brief bursts" of high-intensity, weight-bearing activity equivalent to a medium-paced run for pre-menopausal women, or a slow jog for post-menopausal women, had better bone health.”
Source: EurekAlert!, the online, global news service operated by AAAS, the science society.