Comparative Analysis of Body Shape and Constitution Among Primary and Secondary School Students in 1985 and 2005 in Taiyuan

Objective To analyze primary and middle school students' body shape and constitution during 1985-2005,and to provide a basis for school health planning.Methods Based on 1985 and 2005 students' health research information in Taiyuan.The indices were compared among students aged 7-18 years during 1985-2005,which including height,weight,chest circumference,50 m×8 round running,standing jump,slanting pull-up,pull-up,sitting-up,50 m × 8 running,800 m running,1 000 m running.Results During 1985-2005,primary and secondary school students' growth and development level increased significantly in Taiyuan.The average increment of height was 6.12 cm for boys and 3.31 cm for girls;average increment of weight was 7.58 kg for boys and 3.99 kg for girls;average increment of chest circumference was 4.80 cm for boys and 3.12 cm for girls.The development of physical constitution was uneven.On 50 m running,boys average decreased 0.31 s,girls decreased 0.67 s;on standing long jump,boys increased 4.47 cm,girls declined 4.58 cm averagely;on slanting pull-up,boys averagely increased 1.75 times/min in 7-12-year group but declined 3.64 times/min in 13-18-year group;on sitting-up,the increment was 4.52 times /min in 7-18-year-old girls;on 50 m × 8 round running of 7-12-year group,boys decreased 12.17 s,girls decreased 5.20 s;13-18-year-old boys dropped 40.33 s in 1 000m running,girls dropped 36.08 s in 800 m running.Conclusion For the obvious longitudinal changes in body shapes and dropping trend of physical constitution,some measures should be made to intervene among primary and secondary school students in Taiyuan.