title: [Survey of physical activity and health among Chinese senior citizens over 70 years old].
abstract: OBJECTIVE
  To investigate characteristics of physical activities among Chinese senior citizens over 70 years old, and analyze the relationship between physical activities and health.
  
  
  METHODS
  Using multistage stratified sampling method, 1 960 senior citizens over 70 years old were included in the investigation from 7 cities of 5 provinces in the northeast, east, center and west of China from March to September 2014. After removing missing samples, 1 420 samples were kept. Time duration, intensity, frequency and physical condition scores of each physical activities were obtained by using a questionnaire of physical activities and a simplified version of life quality scale (SF-12 scale). Physical condition scores of different groups with different genders and ages were analyzed by using t-test of two independent samples; and physical conditions of different physical activities were compared by χ(2)-test.
  
  
  RESULTS
  Senior citizens did physical activities 6-7 times per week (79.2%, 1 125/1 420) with low and moderate intensity (41.6%, 591/1 420) for 0.5-1.0 hour per time (42.5%, 604/1 420). Total scores of senior citizen were (63.7 ± 15.1), and health scores of men (67.3 ± 14.8) were higher than those in women (60.1 ± 17.8) (t = 8.31, P < 0.001). Health scores for the group with the age of 70-74 (69.5 ± 14.6) were higher than those in the group of 80-84 and the group ≥ 85 (62.1 ± 17.0, 57.3 ± 17.9) (F were 2.53 and 3.02, respectively, P < 0.001). Health scores for the group with the age of 75-79 (66.0 ± 16.9) were higher than those in the group ≥ 85 (57.3 ± 17.9) (F = 2.47, P < 0.001). Total detection rates of senior citizen were (64.8%, 920/1 420), health detection rates for the groups with higher and medium physical activities (69.8%, 268/384) and (66.8%, 436/653) were both higher than those in the low group (56.4%, 216/383) (χ(2) were 14.78 and 11.13, respectively, P < 0.001).
  
  
  CONCLUSIONS
  Senior citizens have physical activities quite frequently with low and medium intensity for a short time period. Health condition declines with age increases; physical health situations are better for men than those for women. Medium and high physical activities do good to health for senior citizens.
authors.affiliation: Department of Physical Fitness Center, Bengbu Medical College, Bengbu 233030, China; Email: wanghongyu81920@163.com.
authors.forename: Hongyu
authors.initials: H
authors.lastname: Wang
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002681:China; D015444:Exercise; D005260:Female; D006306:Health Surveys; D006801:Humans; D008297:Male; D009043:Motor Activity