1. Laoratory of Sports Physiology, Research and Education Centre for Winter Sports, Hokkaido University of Education, Hokkaido, Japan,
2. Laboratory of Physiology, Research Institute of Electronic Science, Hokkaido University, Hokkaido, Japan,
3. Laboratory of Physiology, Nayoro City College, School of Nursing, Nayoro City, Japan,
4. The First Department of Physiology, Asahikawa Medical College, Asahikawa, Japan.