ZHONG Da; XIE Xiang-mei School of Kinesiology and Physical Education; Nanjing Normal University; Nanjing 210097; Department of P. E. .Nanjing Xiaozhuang College; Nanjing 210038; China;

• 南京师范大学体育科学学院;南京晓庄学院体育系江苏南京;江苏南京;