title: Associations of exercise, sedentary time and insomnia with metabolic syndrome in Taiwanese older adults: A 1-year follow-up study.
abstract: BACKGROUND
  Understanding the risk factors of metabolic syndrome (MetS) is important to public health, since individuals with MetS have an increased risk of health problems. This study examined the associations of exercise, sedentary time and insomnia with incident MetS among older adults 1 year later.
  
  
  METHODS
  A total of 1,359 older adults receiving hospital health examinations in 2012 were studied, and 779 subjects had a follow-up after 1 year. The components of MetS (waist, blood pressure, high-density lipoprotein cholesterol, fasting glucose and triglyceride) were defined by the Program's Adult Treatment Panel III report. Exercise, sedentary time and insomnia data were obtained through self-report questionnaires. Physical fitness (body fatness, balance and hand grip strength) was measured. Two logistic regressions were computed to examine the associations of exercise/physical fitness, sedentary time and insomnia at baseline with incident MetS 1 year later. The first regression included age, sex, smoking and alcohol as covariates. The second regression was further adjusted with the components of MetS.
  
  
  RESULTS
  Sex, exercise/balance, sedentary time and insomnia were significant predictors of MetS. The risk of MetS incidence was 3.36 (95% CI 1.96-5.77) for women, 1.92 (95% CI 1.01-3.63) for those who did not exercise, 2.52 (95% CI 1.37-4.63) for those who sat more than 5 h/day, and 2.17 (95% CI 1.13-4.15) for those with insomnia. Poor balance was significantly associated with greater risk of MetS (AOR = 1.07, 95% CI 1.02-1.12). Sex, sedentary time, insomnia and balance remained significant after adjusting with the components of MetS.
  
  
  CONCLUSIONS
  Cultivating exercise habits, reducing sedentary time and improving sleep quality may be important strategies for MetS prevention among older adults.
authors.affiliation: a Department of Exercise Health Science , National Taiwan University of Sport , Taichung , Taiwan .
authors.forename: Li-Jung
authors.initials: LJ
authors.lastname: Chen
authors.affiliation: b Division of Endocrinology and Metabolism , Puli Branch of Taichung Veterans General Hospital , Puli , Taiwan .
authors.forename: Yun-Ju
authors.initials: YJ
authors.lastname: Lai
authors.affiliation: c Family Medicine Department, Taipei City Hospital Zhongxing Branch , Taipei , Taiwan .
authors.forename: Wen-Jung
authors.initials: WJ
authors.lastname: Sun
authors.affiliation: d Centre for Exercise, Nutrition and Health Sciences, University of Bristol , Bristol , UK .
authors.forename: Kenneth R
authors.initials: KR
authors.lastname: Fox
authors.affiliation: e Department of Neurosurgery , Taipei City Hospital, and Institute of Public Health and Community Medicine Research Center, National Yang-Ming University , Tapei , Taiwan , and.
authors.forename: Dachen
authors.initials: D
authors.lastname: Chu
authors.affiliation: f Graduate Institute of Sports and Health, National Changhua University of Education , Changhua , Taiwan.
authors.forename: Po-Wen
authors.initials: PW
authors.lastname: Ku
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000375:Aging / Q000502:physiology*; D015444:Exercise; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D024821:Metabolic Syndrome / Q000453:epidemiology*; D012307:Risk Factors; D057185:Sedentary Behavior; D012737:Sex Factors; D007319:Sleep Initiation and Maintenance Disorders / Q000453:epidemiology*; D013624:Taiwan / Q000453:epidemiology; D013997:Time Factors
keywords: Inactivity; MetS; longitudinal; physical activity; sleep