The Research On Children’s Physical Activity Of Jianye District Of Nanjing

Research purpose: Use the objective physical activity measurement toresearch the children’s physical activity of Jianye District ofNanjing through three years. Compare the characteristics ofchildren’s physical activity in weekdays or weekends. And analyzethe relationships between the characteristics of children’sphysical activity with the body shape. Explain the reasons that leadto the vertical differences.Research methods: It extracted96pupils in primary school from2010to2012. It ask for the students to wear the accelerometers for7days, including5weekdays and2weekends. At the same time, accordingto the BMI standard to get the index of body shape every year.Results:(1) The survey showed that, in three years, boys’overweight rates on three years were12.5%,17.86%and12.5%; Andgirls’ were10.0%,10.0%,12.5%. The obesity rates in the three yearsof boys and girls were separately, the boys were14.29%,17.86%and14.29%respectively; The girls’ obesity rates were2.5%in threeyears.(2)The average daily sedentary time in a week for three yearswas474.87min and493.68min and510.10min less than girls’512.58min and526.31min and547.91min; The average daily MVPA time ina week for three years was47.33min and43.84min and47.33min morethan girls37.67min and36.16min and35.13min.(3) In three years,the average daily sitting time during studying days of boy was482.24min and494.91min and504.32min less than girl519.63min and527.69min and547.14min. The average daily sitting time during weeks ofboy468.10min and495.73min and528.30min less than girls was497.69min and526.99min and552.80min. There were not obvious fluctuationsof MVPA between boys and girls in studying days. In weekends, theMVPA of boys were52.00min,38.86min and38.08min. Girls MVPAchanged a little in the weekends. Boys’ MVPA in both studying daysand weekends were higher than girls.(4) In three years, the sit-insproportions at campus of boys and girls were partly49.90%,52.67%,52.61%and55.89%、57.13%、59.81%. While these proportions for girls were a little bit lower than outside school（59.26%、60.89%、62.81）. The proportions of MVPA in school for boys were6.05%、6.09%and6.44%from2010to2012. And these records were higher thanoutside school. The proportions of MVPA in school for girls were5.00%、5.09%、5.29%from2010to2012and these records were alsohigher than outside school（3.37%、3.30%、3.15%）.(5) During2010-2012,the times of boys can keep doing exercise in5minutes were3.54、3.75、4.21and for girls, the data were2.35、3.36and3.42.The activity cumulative times of boys were27.65min and29.07minand33.46min. The records of girls were17.12min and24.86min and24.74min.(6) There were less than once a day for boys and girlsto do MVPA lasting10minutes.(7) The numbers for normal figurestudents to do MVPA in studying days were44.08min、44.45min、45.28min,which were higher than overweight pupils（37.24min、38.89、40.22min).The issue also showed in weekends. And there appeared adecreased situation of overweight students to do MVPA (41.64min、23.69min、23.64min） through weekends every year.Research conclusion:(1) In Jianye District of Nanjing, theproportions of overweight for part of boys were12.50%to17.50%andfor part of girls were10.00%to12.50%. And the proportions ofobesity for part of boys were12.50%to14.29%and for part of girlswere2.5%. The proportions of overweight and obesity of boys werehigher than girls.(2) At Jianye District of Nanjing, the level ofprimary students to do MVPA was little bit low. Figures of boys werelower than47.33min/d and girls were lower than37.67min/d.All thefigures were below the organization recommended value.(3)Weekend’s MVPA time was lower than studying days and MVPA time oncampus was higher than outside campus. General trend of physicalactivity in Jianye District of Nanjing was that no matter in studyingdays or weekends, with the ages increased, sitting time increasedyear by year and MVPA time added year by year. In terms of gender,boys’ sit time was less than girls’. MVPA time of boys was higherthan girls.(4) The characteristic of physical activity for pupilsin Jianye District of Nanjing was shot-time and interval.(5) Thetime of sit-still for children who were overweight and obese was longer than normal children in weekend. The time of doing MVPA forchildren who were overweight and obese was longer than normalchildren in both studying days and weekends.