|（1.Graduate Department，Wuhan Sports University，Wuhan 430079，China；2.Bayi School of the 2nd Division，Yanqi 841000，China；3.School of Health Sciences，Wuhan Sports University，Wuhan 430079，China，
4.Key Laboratory of Sports Training and Monitoring，Wuhan 430079，China)
Abstract: In order to probe into the functions of sleep quality in physical exercising and academic achievements：In order to probe into the functions of physical exercising in sleep quality and academic achievements, the authors, by using Physical Exercising Rating Scale (PARS-3) and Pittsburg Sleep Index Scale, collectively measured 224 stu-dents randomly chosen from a middle school in Xinjiang region, and revealed the following findings: the high school students’ physical exercising volume was low, their sleep quality was not optimistic; there was a significant gender difference in physical exercising volume, while there was no such a difference in sleep quality; the sleep quality and academic achievements of the students with a high physical exercising volume were all better than those of the students with a low physical exercising volume; there was a significant correlation between physical exercis-ing volume and sleep quality (r=-0.24), physical exercising volume and academic achievements (r=0.40), sleep qual-ity and academic achievements (r=-0.38); the effect of physical exercising on academic achievements was realized via sleep quality, its mediating effect was 21.75% of the total effect. The said findings indicate that physical exer-cising is an effective way to improve academic achievements, and can promote the improvement of academic achievements via improving sleep quality. Reinforcing physical exercising and improving sleep quality are feasible methods for improving academic achievements.
Key words: sports medicine；physical exercising；academic achievement；sleep quality；high school student