1. Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Bokji-ro 75, Busanjin, Busan 633-165, Korea.
2. Department of Kinesiology, Inha University, Incheon 402-751, Korea.
3. Department of Physical Education, Pukyong National University, Busan 608-737, Korea.
4. Division of Humanities and Social Science, POSTECH, Gyecngbuk 790-784, Korea.
5. Division of Leisure & Sports Science, Dongseo University, Busan 617-716, Korea.