1. School of Physical Education, Hunan University of Science and Technology, Xiangtan 411201, China
2. China Athletics College, Beijing Sport University, Beijing 100061, China
3. School of Business, Hunan University of Science and Technology, Xiangtan 411201, China
4. School of Social and Political Science, University of Edinburgh, Edinburgh EH8 9LD, UK
5. Department of Medical Bioinformatics, University of Göttingen, 37077 Göttingen, Germany