These wellness promoters try to facilitate a healthier population and a higher quality of life. The transport of, for example, latte stones, involving hyper extension and torque of the lower back, while dragging the stones, may have contributed to the development of micro fractures in the spine and subsequent spondylolysis. Medical genetics differs from human genetics in that human genetics is a field of scientific research that may or may not apply to medicine, but medical genetics refers to the application of genetics to medical care. Descriptions of lodestone attracting iron were made in the guanzi, master lu's spring and autumn annals and huainanzi.