Department of Health and Nutrition;
Faculty of Health and Nutrition;
Yamagata Prefectural Yonezawa University of Nutrition Sciences;
Yonezawa-shi;
Japan;
Department of School Health;
Faculty of Education;
Kumamoto University;
Kumamoto-shi;
Japan;
Ultrasound; Bone; Density; Young; Adult; Female; Exercise; History; Nutrition; Survey;