Background:Nowadays, the Internet has penetrated every corner of society. According to the report of the China Internet Network Information Center, by the end of December 2015, China
had 688 million people using the internet, which represented around half of the country's population. Yet those aged between 10 and 39 comprise 75.1 % of the overall number. The internet makes our
life much more convenient and efficient and it also brings many negative impacts as well. The Chinese National Survey on Students Constitution and Health began in 1985 and it repeated every 5 years.
The surveys showed that the Chinese young peoples’ physical fitness had deteriorated over a 30-years period, which has aroused great concern to the government and society. The aim of this study was to
study the relationship between the Chinese young peoples’ leisure-time physical activity(LTPA) and health-related quality of life(HRQoL).
Methods:By using the methods of literature consultation, investigation, statistics, and comparison, 2743 of students（female:1384 vs. male:1359）aged 11-22 yrs were randomly selected
from Shanghai, China. The leisure-time physical activity level was estimated by The International Physical Activity Questionnaire. The health-related quality of life was measured with the Medical
Outcome Study 36-item short form (SF-36), the SF-36 assesses four dimensions of physical health: physical functioning (PF), role functioning-physical (RP), bodily pain (BP), and general health
perception (GH). Additionally, it assesses four dimensions of psycho-social health: vitality (VT), mental health (MH), role functioning-emotional (RE), and social functioning (SF). SF-36 has been
widely used in of clinical and nonclinical studies, which has good reliability and validity.
Results:The study showed that 31.9% (female:24.4% vs.male:39.5% ) of the students participated in regular basis of moderate to vigorous physical activity (MVPA) . Results from
multivariate analysis showed that the young people meeting physical activity recommended level was associated with higher perceived HRQoL scores (except in Bodily Pain dimension for male). Partial
correlations revealed small-to-moderate associations between LTPA and GH, VT, and MH (P<0.05). The comparative study showed that the Chinese young people had lower HRQoL scores than the Chinese Taiwan
young people in most dimensions of HRQoL. The reasons were likely to be intense learning and exam, job competition, lifestyle change, and so on.
Conclusions:With the influence of the rapid economic development, globalization, urbanization and information networking, the Chinese lifestyles have changed dramatically. This study
listed some health problems among the Chinese young people. It indicated that regular leisure-time physical activity can help young people to improve their HRQoL in Vitality, Mental Health, and
General Health. It can help the young people to reduce the risk of mental health problem. Face with the challenges of the network era, the government, society, school and family need to work together
to promote healthy and active lifestyles for the young people.