New research from the University of Exeter and the University of Leicester, both in the United Kingdom, suggests that a single 1-minute bout of high-intensity, weight-bearing physical activity is associated with better bone health in women.
Such brief bursts of activity are equivalent to a run at a medium pace for premenopausal women, and a slow-paced jog for postmenopausal women. The findings were published in the International Journal of Epidemiology.

Osteoporosis is a bone disease that causes bone to become weak and brittle. Bone tissue is constantly broken down and replaced, but osteoporosis occurs when new bone production does not keep pace with the removal of old bone.

Individuals with osteoporosis have holes and spaces in the bone that are larger than those of healthy bone. This reduced bone density and mass make the bones more likely to break.
http://9jahealth.com.ng/running-1-minute-per-day-may-protect-womens-bone-health/