Prevalence Of Physical Activity And Physical Fitness Among Chinese Children And Adolescents Aged 9-17 Years Old

PurposeThe objective of this study was to investigate the prevalence of MVPA(Moderate-to-Vigorous Physical Activity),ST(Screen Time),MSA(Muscle Strengthening Activity),physical fitness,overweight and obesity among Chinese children and adolescents aged 9-17 years old,and to examine the association between MVPA,ST,MSA with physical fitness and overweight and obesity.MethodsWe conducted cross-sectional analyses of 243,143 children and adolescents who participated in PAFCTYS(Physical Activity and Fitness in China-The Youth Study)in 2016-2018.The PAFCTYS applied a multistage stratified cluster sampling method to recruit children and adolescents in 31 provinces,direct-controlled municipalities,autonomous regions and 1 Xinjiang Production and Construction Corps.The MVPA,ST and MSA were measured by self-reports and the physical fitness was assessed by the 2014 revised Chinese National Student Physical Fitness Standard.Prevalence estimates of percentage of meeting MVPA(? 60 min/day),ST(< 2 h/day),MSA(? 3days/week)recommendations and combinations,“no pass”,“pass”,“good”,“excellent” of physical fitness,overweight and obesity were calculated.The logistic analyses were used to analyze the differences about the prevalence estimates by sex,school grade and residence locales,to analyze the associations between meeting MVPA,ST,MSA recommendations and combinations with physical fitness and overweight and obesity,adjusted for age,gender,residence local,ethnicity,family income,living arrangement,homework time.Results1.36.30%,63.10%,46.98% of the participants met MVPA,ST,MSA recommendation,respectively,while 14.13% met all recommendations.Compared with the girls,the boys(a OR(adjusted odds ratio)= 1.085,95%CI(confidence interval):1.084-1.085)were more likely to meet all recommendations;compared with primary school children,the junior middle(a OR = 0.819,95%CI: 0.819-0.820)and junior high school(a OR = 0.505,95%CI: 0.504-0.505)adolescents were less likely to meet all recommendations;compared with the rural counterparts,the children and adolescents living in urban areas(a OR = 1.151,95%CI: 1.150-1.151)were more likely to meet all recommendations.2.7.27% of children and adolescents achieved a “no pass”,61.14% achieved a“pass”,26.44% achieved a “good”,and 5.15% achieved an “excellent” in physical fitness test,while the percentages of overweight and obesity were 13.81% and 8.03%,respectively.Compared with the girls,the boys were less likely to pass the physical fitness test(a OR = 0.499,95%CI: 0.499-0.499),achieve “good or excellent”(a OR =0.680,95%CI: 0.679-0.680)and were more likely to be overweight(a OR = 1.532,95%CI: 1.531-1.533)and obese(a OR = 1.934,95%CI: 1.932-1.935).Compared with the primary school children,the junior middle(a OR = 0.500,95%CI: 0.499-0.500;a OR = 0.734,95%CI: 0.733-0.734)and junior high school(a OR = 0.623,95%CI:0.622-0.624;a OR = 0.563,95%CI: 0.563-0.563)adolescents were less likely to pass the physical fitness test,achieve “good or excellent”,and were more likely to be overweight(a OR = 1.016,95%CI: 1.016-1.017;a OR = 1.075,95%CI: 1.074-1.076),but less likely to be obese(a OR = 0.643,95%CI: 0.643-0.644;a OR = 0.391,95%CI:0.390-0.391).Compared with the rural counterparts,the children and adolescents living in urban areas(a OR = 0.861,95%CI: 0.860-0.862)were less likely to pass the physical fitness test,but more likely to achieve “good or excellent”(a OR = 1.033,95%CI: 1.033-1.034),and were more likely to be overweight(a OR = 1.361,95%CI:1.361-1.362)and obese(a OR = 1.569,95%CI: 1.567-1.570).3.Compared with the counterparts who met none of the recommendations,the children and adolescents who met only one recommendation(a OR = 1.441,95%CI:1.439-1.442;a OR = 1.346,95%CI: 1.345-1.347;a OR = 0.933,95%CI: 0.932-0.934),met both recommendations(a OR = 2.185,95%CI: 2.183-2.188;a OR = 1.989,95%CI:1.988-1.991;a OR = 0.902,95%CI: 0.902-0.903),met all recommendations(a OR =2.930,95%CI: 2.925-2.934;a OR = 2.526,95%CI: 2.524-2.529;a OR = 0.887,95%CI: 0.886-0.888)were more likely to pass the physical fitness test,achieve“good or excellent” and were less likely to be overweight and obese,p for trend was less than 0.001.Conclusion1.Among Chinese children and adolescents aged 9-17 years old in 2016-2018,more than 60% of youth was physical inactivity,more than 1 in 3 of youth didn't meet ST recommendation,more than half of this population didn't meet MSA recommendation,and the percentage of children and adolescents met the all recommendations was extremely low,less than 1 in 7.Girls,children and adolescents in middle school and living in rural areas were more less likely to meet the all recommendations.2.Among Chinese children and adolescents aged 9-17 years old in 2016-2018,less than 1 in 3 youth achieved “good” or “excellent” fitness standard,and more than1 in 5 youth were overweight and obese.The boys and middle school adolescents were less likely to achieve “good or excellent” fitness standard,boys were more likely to be obese,the middle school adolescents were less likely to be obese,the boys living in urban areas were less likely to achieve “good or excellent” fitness standard,the girls living in urban areas were more likely to achieve “good or excellent” fitness standard,the children and adolescents living in urban areas were more likely to be obese.3.Compared with the children and adolescent who met none of the recommendations,those met any of these recommendations were more likely to pass the physical fitness standard and achieve “good or excellent”,and less likely to be overweight and obese.Furthermore,the children and adolescents met more recommendations were more likely to pass the physical fitness standard and achieve“good or excellent”,and less likely to be overweight and obese.