Atrophy of the bones
Until the age of about 30, the bone formation processes are predominant. With advancing age, more and more bone mass is broken down. A disproportionate decrease of bone density is known as osteoporosis.
Pressure from all directions
Bones are subject to tensile, compressive, shearing, and torsional forces. A bone breaks if it is overloaded. That is most likely to happen if the bone is twisted.
primarily dynamic exercises with power input that alternately stress and relax the body
…calcium and Vitamin D:
through healthy, balanced nutrition and sunlight
are caused by osteoporosis worldwide every year.