Body mass index is associated with physical performance in suburb-dwelling older Chinese: A cross-sectional study

Suxing Shen, Jing Li, Qi Guo, Wen Zhang, Xiuyang Wang, Liyuan Fu, Linke Li, Yufang An, Weixi Liu, Hongyun Li, Tao Huang, Zedan Zhang, Kaijun Niu

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Background: Physical performance is reported to have various beneficial effects on human health, especially in older individuals. Although such effects are associated with body mass index (BMI), the relationship between BMI and physical performance has not been clarified. Design: We conducted a cross-sectional study of 966 suburb-dwelling Tianjin individuals aged ≤ 60 years (average age 67.5±6.02, men 435, women 531). Mobility, balance, and muscle strength were assessed by walking speed, timed up-and-go test (TUGT), and grip strength, respectively. The subjects were categorized into three groups based on BMI (kg/m2) as follows: normal weight, 18.5 ≥ BMI ≥ 23.9; overweight, 24.0 ≥ BMI ≥ 27.9; and obese, BMI ≤ 28.0. Result: After adjusting for all other variables, relative grip strength decreased when BMI increased in both men and women (P for trend <0.001 and <0.001, respectively). BMI may be negatively associated with TUGT performance in the women only. There was no apparent association between walking speed and BMI in either sex, but after adjusting for age, walking speed was faster when BMI increased in women (P for trend= 0.0162). Conclusion: This study suggests that in older individuals, higher BMI is associated with poor muscle strength in both sexes.

Original languageEnglish
Article numbere0119914
JournalPloS one
Volume10
Issue number3
DOIs
Publication statusPublished - 2015 Mar 16

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General

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