（1.Laboratory of Laser Sports Medicine，School of Physical Education，South China Normal University，Guangzhou 510006，China；2.Health 100，Guangzhou Meinian Health Fuhai Clinic Limited Company，Guangzhou 510620，China) Abstract: By introducing the Weber-Fechner law, time self-similarity and sigma algorithm, the authors reanalyzed the survey data of the overweight and obesity detection rates among students aged 7-18 in China in 2010 and 2014, and re-vealed the following findings: 1) from 2010 to 2014, the overweight and obesity detection rates among students aged 7-18 in China had no topological difference in terms of gender, i.e. the overweight and obesity detection rates among elementary and middle school students presented a self-limiting process; 2) from 2010 to 2014, the overweight and obesity detection rates among students aged 7-18 in China had topological differences in terms of city and countryside, mainly showing that countryside’s were better than city’s; 3) from 2010 to 2014, the overweight and obesity detection rates among students aged 7-18 in China produced topological changes in terms of time, mainly showing that the overweight detection rate of urban male students and the overweigh and obesity detection rates of urban female students presented an increasing trend, while the obesity detection rates of urban male students and rural male and female students maintained unchanged. The findings indicated that among the groups of urban and rural elementary and middle school students in China nowadays, only the obesity detection rate of urban female students presented a constantly increasing trend.
Key words: overweight and obesity；Weber-Fechner law；self-limiting process；first principle；sigma algorithm；elementary and middle school students |
