title: [The impact of regular exercise habit on exercise tolerance early after acute myocardial infarction].
abstract: OBJECTIVE
  To investigate the relationship between regular exercise habit and peak oxygen uptake (VO₂peak) early after acute ST-elevation myocardial infarction (STEMI).
  
  
  METHODS
  A total of 239 patients who underwent cardiopulmonary exercise testing (CPET) early after STEMI in a single exercise laboratory were enrolled. Influencing factors to VO₂peak were analyzed retrospectively.
  
  
  RESULTS
  There were 53.6% patients reported to have regular exercise habits before STEMI. No significant difference between patients with and without exercise habit in VO(2)peak early after STEMI (P = 0.317) were found by t test. After adjusted by risk factors including demographic features, clinical characteristics and cardiovascular, etc, regular exercise habit was an independent factor for VO₂peak (β = 1.703, P = 0.015). Following age-stratification, the significant difference was found between patients with and without exercise habits in VO₂peak only in patients aged between 40 - 49 years old (P = 0.004).
  
  
  CONCLUSIONS
  The relationship between regular exercise habit and VO₂peak early after STEMI suggests that exercise tolerance of patients with exercise habit will be better than sedentary patients even after STEMI, in particular to patients aged between 40 - 49 years old.
authors.affiliation: Department of Cardiology, Peking University Third Hospital; Key Laboratory of Cardiovascular Molecular Biology and Regulatory Peptides, Ministry of Health (Peking University Third Hospital), Beijing 100191, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhao
authors.forename: Jin
authors.initials: J
authors.lastname: Bai
authors.forename: Fu-chun
authors.initials: FC
authors.lastname: Zhang
authors.forename: Hong-yan
authors.initials: HY
authors.lastname: Wang
authors.forename: Wei
authors.initials: W
authors.lastname: Gao
mesh_terms: D000328:Adult; D000368:Aged; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D017079:Exercise Tolerance; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000175:diagnosis* / Q000503:physiopathology*; D010101:Oxygen Consumption; D012189:Retrospective Studies