title: Tai Chi, arterial compliance, and muscle strength in older adults.
abstract: BACKGROUND
  Aerobic exercise can alleviate the declines in arterial compliance common in older adults. However, when combined with strength training, aerobic exercise may not reduce arterial compliance. Tai Chi practice has been found to improve muscle strength and cardiopulmonary function in older subjects, but whether or not it improves arterial compliance is not known. The primary aim of this study was to investigate whether Tai Chi practitioners have better arterial compliance and muscle strength.
  
  
  METHODS
  Twenty-nine older Tai Chi practitioners (73.7 ± 4.5 years) and 36 healthy control subjects (71.4 ± 6.6 years) participated in this cross-sectional study.
  
  
  METHODS
  The participants were independent in their daily living activities. They were screened for apparent cardiovascular disease and underwent arterial compliance testing and isokinetic knee muscle strength testing at 30°/s.
  
  
  RESULTS
  Tai Chi practitioners showed significantly better haemodynamic parameters than the controls as indexed by larger and small artery compliance. They also demonstrated greater eccentric muscle strength in both knee extensors and flexors.
  
  
  CONCLUSIONS
  The findings of better muscle strength without jeopardizing arterial compliance suggests that Tai Chi could be a suitable exercise for older persons to improve both cardiovascular function and muscle strength.
authors.affiliation: The Hong Kong Polytechnic University, Hong Kong, China.
authors.forename: Xi
authors.initials: X
authors.lastname: Lu
authors.forename: Christina W Y
authors.initials: CW
authors.lastname: Hui-Chan
authors.forename: William W N
authors.initials: WW
authors.lastname: Tsang
mesh_terms: D000367:Age Factors; D000368:Aged; D001158:Arteries / Q000502:physiology*; D016022:Case-Control Studies; D016009:Chi-Square Distribution; D003187:Compliance; D003430:Cross-Sectional Studies; D005260:Female; D006439:Hemodynamics; D006801:Humans; D007719:Knee Joint / Q000502:physiology*; D008297:Male; D015999:Multivariate Analysis; D053580:Muscle Strength; D053581:Muscle Strength Dynamometer; D063177:Pulse Wave Analysis; D026302:Tai Ji; D059289:Vascular Stiffness