MAKE NO BONES

Some exercises do not promote bone density - swimming, weight training, cycling, walking.

Weight lifting isn’t explosive enough to stimulate such bone bending. Neither is swimming. Running can be, although for unknown reasons, it doesn’t seem to stimulate bone building in some people. Surprisingly, brisk walking has been found to be effective at increasing bone density in older women, Dr. Barry says. But it must be truly brisk. “The faster the pace,” he says — and presumably the greater the bending within the bones — the lower the risk that a person will fracture a bone.

FULL ARTICLE - NY TIMES