Human bones are remarkably plastic and respond surprisingly quickly to change. Put under stress through physical exertion - such as long-distance walking or running - bones gain in strength as the fibres are added or redistributed according to where strains are highest. The ability of bone to adapt to loading is shown by analysis of the skeletons of modern athletes, whose bones show remarkably rapid adaptation to both the intensity and direction of strains.
(Score: 2) by edIII on Wednesday May 14 2014, @09:56PM
Considering the popularity of Tai Chi in Japan I would bet there is plenty of bone density data there and some control groups of women that don't live in Japan, or live in Japan and don't practice Tai Chi.
Technically, lunchtime is at any moment. It's just a wave function.