Analysis of the changing trend of physical quality of adolescents aged 7-18 in Shanghai from 2000 to 2014

Objective To study on condition and changing tendency of the physical quality among children and adolescents aged 7-18 in Shanghai,and to provide references for improving the levels of students' physical fitness and health.Methods LMS method was used to fit the curve of 50 th percentile of the physical quality index of 2000,2005,2010 and 2014 of children and adolescents aged 7-18 in Shanghai,and the long-term trend of the physical quality of children and adolescents,including the changing rule and the gender differences,were analyzed.Results The index scores of 50 th percentile gripping,50-meter running and anteversion on seat(girls) were improved(P<0.05).The gripping power of boys and girls were improved by 3.13 and 3.15 kg,respectively.The score of anteversion on seat was promoted by 0.8 cm on average.However,the index scores of of 50 th percentile of tanding long jump,slanting pull-up(boys),pull-up(boys),1-minute sit ups (girls),50 m×8 running,1 000 m endurance running(boys),800 m running (girls) and anteversion on seat (boys) were decreased(P<0.05),and the scores of standing long jump of boys and girls were decreased by 11.0 and 8.59 cm,respectively,and the scores of endurance running of boys and girls were decreased by 2.75 and 2.34 s,respectively.Conclusion The adolescents in Shanghai show downtrend in their lower limb explosive strength,muscle endurance,aerobic endurance.Therefore,it is necessary to take targeted measures.