title: Dynamic observations of their body constitution status in Zhuang students of Guangxi from 1985 to 2000.
abstract: OBJECTIVE
  To study the rules of changes in body constitution of Zhuang students in Guangxi and factors influencing it.
  
  
  METHODS
  Data on body constitution of Zhuang students aged seven to 22 in the year of 2000 were compared with those in 1985.
  
  
  RESULTS
  The average height of Zhuang students increased by 3.80 cm and 2.45 cm for boys and girls in urban areas, respectively from 1985 to 2000 in Guangxi, and by 1.40 cm and 1.32 cm in rural areas, respectively. The average weight increased by 3.58 and 1.90 kg for boys and girls in urban areas, respectively, and by 0.65 kg and 0.02 kg in rural areas, respectively. The average chest circumference increased by 2.09 and 1.28 cm for boys and girls in urban areas, respectively, but in the rural areas, that for boys increased by 0.08 cm and for girls decreased by 0.01 cm. The average systolic blood pressure (BP) decreased by 4.33 mm Hg and 5.06 mm Hg (0.58 kPa and 0.67 kPa) for boys and girls in urban areas, respectively, and by 5.04 mm Hg and 7.03 mm Hg (0.67 kPa and 0.94 kPa) in rural areas, respectively. The average diastolic BP increased by 12.04 mm Hg and 10.84 mm Hg (1.60 kPa and 1.44 kPa) for boys and girls in urban areas, respectively, and by 8.72 mm Hg and 6.54 mm Hg (1.16 kPa and 0.87 kPa) in rural areas, respectively. The average vital capacity increased by 195.15 ml and 109.75 ml, and 23.54 ml and 13.44 ml for urban boys and girls, and rural boys and girls, respectively. The average record of 50 m x 8 run to and for decreased by 5.00 s and 8.79 s for urban boys and girls, respectively, and by 5.27 s and 7.21 s for rural boys and girls, respectively. The average record of 1 000 m run decreased by 19.85 s and 23.88 s for urban and rural boys, respectively, and that of 800 m run decreased by 23.19 s and 6.25 s for urban and rural girls, respectively.
  
  
  CONCLUSIONS
  The results mentioned above suggested that provision of reasonable nutrition and active physical training for the Zhuang students are basic measures to improve their body constitution and promote their levels of growth and development.
authors.affiliation: Department of Child and Adolescent Health, School of Public Health, Guangxi Medical University, Nanning 530021, China.
authors.forename: Jialin
authors.initials: J
authors.lastname: Wang
mesh_terms: D000293:Adolescent; D000328:Adult; D001824:Body Constitution / Q000502:physiology*; D001827:Body Height; D001835:Body Weight; D002648:Child; D002681:China / Q000208:ethnology; D005260:Female; D006801:Humans; D008297:Male; D008913:Minority Groups