1. Laboratory of Exercise Physiology, Division of Health Promotion, National Institute of Health and Nutrition, Shinjuku City, Tokyo 162-8636;
2. Department of Health Administration, School of Health Science and Nursing, Faculty of Medicine, University of Tokyo, Bunkyo City, Tokyo 113;
3. Department of Life Sciences, Graduate School of Arts and Sciences, University of Tokyo, Meguro City, Tokyo 153-8902, Japan