Body Mass Index Is Associated with Physical Performance in Suburb-Dwelling Older Chinese: A Cross-Sectional Study Suxing Shen1,2‡, Jing Li3‡, Qi Guo1,2*, Wen Zhang1,2, Xiuyang Wang2, Liyuan Fu2, Linke Li2, Yufang An2, Weixi Liu2, Hongyun Li2, Tao Huang2, Zedan Zhang2, Kaijun Niu4,5 1 Department of Rehabilitation Medicine, Cardiovascular Clinical College of Tianjin Medical University, TEDA International Cardiovascular Hospital, Tianjin, China, 2 Department of Rehabilitation and Sports Medicine, Tianjin Medical University, Tianjin, China, 3 Key Laboratory of Hormones and Development (Ministry of Health), Metabolic Disease Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin, China, 4 Nutritional Epidemiology Institute, Tianjin Medical University, Tianjin, China, 5 School of Public Health, Tianjin Medical University, Tianjin, China ‡ These authors contributed equally and are co-first authors on this work. * [email protected]
OPEN ACCESS Citation: Shen S, Li J, Guo Q, Zhang W, Wang X, Fu L, et al. (2015) Body Mass Index Is Associated with Physical Performance in Suburb-Dwelling Older Chinese: A Cross-Sectional Study. PLoS ONE 10(3): e0119914. doi:10.1371/journal.pone.0119914 Academic Editor: Yan Chen, Institute for Nutritional Sciences, CHINA Received: July 14, 2014 Accepted: January 17, 2015 Published: March 16, 2015 Copyright: © 2015 Shen et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Data Availability Statement: All relevant data are within the paper. Funding: This work was supported by grant (81372118) from the National Natural Science Foundation of China, and grant (20120130) from the Tianjin City High School Science & Technology Fund Planning Project. The funders had an important role in study design, data collection and analysis, and decision to publish. Competing Interests: The authors have declared that no competing interests exist.
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