[The study for effect of running on bone.]

Running-exercise is a weight-bearing-exercise. Power of an effect for running-exercise might be different by exercise intensity, running speed, and duration time. In general, running-exercise could be effective on bone. However, in case of Female Athlete Triad, under the condition of low energy availability running-exercise should not be effective positively for bone. Influence of appropriate mechanical stress, stimulate calcium absorption, and so on through running-exercise could be effective positively for bone.