title: Acute cardiovascular response to resistance training during cardiac rehabilitation: effect of repetition speed and rest periods.
abstract: BACKGROUND
  Resistance training has been introduced into rehabilitation to improve the efficiency of the 1980s traditional training. Among the modalities, the choice of recovery period length or repetition speed is hardly explained in term of functional benefit but not in terms of cardiovascular (CV) response. To our knowledge, no investigation has been made on the acute CV effect of repetition speed and rest periods between sets of such training during rehabilitation.
  
  
  METHODS
  Our population included 17 male coronary patients. The experiment was performed on a leg extension device. A task force monitor noninvasive measurement system was used for continuous monitoring of the heart rate, systolic blood pressure and cardiac output. To evaluate the impact of the speed of contraction, individuals performed randomly, 3 x 10 repetitions (75% resistance maximum) at slow, moderate or fast pace. To evaluate the effect of the recovery period, individuals performed randomly, 3 x 10 repetitions separated by 30, 60, 90 or 120 s.
  
  
  RESULTS
  We observed a progressive drift of heart rate, systolic blood pressure and cardiac output between each rest period and sets for all the modalities. These drifts were more pronounced when the rhythm of contraction was slow or when the recovery period was short (30 or 60 s).
  
  
  CONCLUSIONS
  This work confirms the results of an earlier study showing that the main factor affecting the CV response is the length of the set. The 'ideal modality' should be three sets of 10 repetitions, at 75% resistance maximum, fast executed, with a 90 s recovery period between successive sets.
authors.affiliation: Department of Cardiology, Erasme Hospital, Free University of Brussel, Belgium. mlamotte@ulb.ac.be
authors.forename: Michel
authors.initials: M
authors.lastname: Lamotte
authors.forename: Fany
authors.initials: F
authors.lastname: Fleury
authors.forename: Melissa
authors.initials: M
authors.lastname: Pirard
authors.forename: Alexander
authors.initials: A
authors.lastname: Jamon
authors.forename: Philippe
authors.initials: P
authors.lastname: van de Borne
mesh_terms: D000368:Aged; D001794:Blood Pressure; D002302:Cardiac Output; D003327:Coronary Disease / Q000503:physiopathology / Q000534:rehabilitation*; D006339:Heart Rate; D006439:Hemodynamics; D006801:Humans; D007866:Leg; D008297:Male; D008875:Middle Aged; D009119:Muscle Contraction; D010507:Periodicity; D020127:Recovery of Function; D055070:Resistance Training / Q000379:methods*; D012146:Rest; D013997:Time Factors; D016896:Treatment Outcome