title: Effects of endurance training on heart rate and blood pressure variability.
abstract: OBJECTIVE
  To study the influences of a 1-year controlled, randomized endurance exercise training period on heart rate (HR) and blood pressure variability in a representative sample of Finnish men in their late middle age.
  
  
  RESULTS
  Subjects were 140 sedentary men aged 53-63 years. The men were randomized into two identical groups: an intervention (EX) and a reference (CO) group. One hundred and twelve of them remained in the final analysis (EX: n=59, CO: n=53). EX trained for 30-60 min three to five times a week with the intensity of 40-60% of maximal oxygen consumption. In EX, 1 year of regular exercise training increased oxygen consumption at respiratory compensation threshold by 11% (P < or = 0.001) in a maximal cardiorespiratory test. Total power and very low frequency power of R-R interval variability (ms2) tended to increase in the EX group by 26 and 42% and to decrease in the CO group by 13 and 10% (interaction P<0.05 and P<0.01), respectively. There were no significant changes in blood pressure variability.
  
  
  CONCLUSIONS
  Regular low- to moderate-intensity exercise training could retard the declining tendency in cardiac autonomic nervous function in older men during 1 year.
authors.affiliation: Department of Clinical Physiology and Nuclear Medicine, Kuopio University Hospital, Kuopio, Finland. arja.uusitalo-koskinen@kuh.fi
authors.forename: Arja L T
authors.initials: AL
authors.lastname: Uusitalo
authors.forename: Tomi
authors.initials: T
authors.lastname: Laitinen
authors.forename: Sari B
authors.initials: SB
authors.lastname: Väisänen
authors.forename: Esko
authors.initials: E
authors.lastname: Länsimies
authors.forename: Rainer
authors.initials: R
authors.lastname: Rauramaa
mesh_terms: D001341:Autonomic Nervous System / Q000502:physiology; D001794:Blood Pressure / Q000502:physiology*; D001823:Body Composition; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008019:Life Style; D008297:Male; D008875:Middle Aged; D010101:Oxygen Consumption / Q000502:physiology; D010807:Physical Endurance / Q000502:physiology*; D012146:Rest; D016683:Supine Position