title: Short-term inspiratory muscle training potentiates the benefits of aerobic and resistance training in patients undergoing CABG in phase II cardiac rehabilitation program.
abstract: OBJECTIVE
  To investigate the efficiency of short-term inspiratory muscle training program associated with combined aerobic and resistance exercise on respiratory muscle strength, functional capacity and quality of life in patients who underwent coronary artery bypass and are in the phase II cardiac rehabilitation program.
  
  
  METHODS
  A prospective, quasi-experimental study with 24 patients who underwent coronary artery bypass and were randomly assigned to two groups in the Phase II cardiac rehabilitation program: inspiratory muscle training program associated with combined training (aerobic and resistance) group (GCR + IMT, n=12) and combined training with respiratory exercises group (GCR, n=12), over a period of 12 weeks, with two sessions per week. Before and after intervention, the following measurements were obtained: maximal inspiratory and expiratory pressures (PImax and PEmax), peak oxygen consumption (peak VO2) and quality of life scores. Data were compared between pre- and post-intervention at baseline and the variation between the pre- and post-phase II cardiac rehabilitation program using the Student's t-test, except the categorical variables, which were compared using the Chi-square test. Values of P<0.05 were considered statistically significant.
  
  
  RESULTS
  Compared to GCR, the GCR + IMT group showed larger increments in PImax (P<0.001), PEmax (P<0.001), peak VO2 (P<0.001) and quality of life scores (P<0.001).
  
  
  CONCLUSIONS
  The present study demonstrated that the addition of inspiratory muscle training, even when applied for a short period, may potentiate the effects of combined aerobic and resistance training, becoming a simple and inexpensive strategy for patients who underwent coronary artery bypass and are in phase II cardiac rehabilitation.
authors.affiliation: Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.
authors.forename: Bárbara Maria
authors.initials: BM
authors.lastname: Hermes
authors.affiliation: Department of Physiotherapy, Universidade de Santa Cruz do Sul, Santa Cruz do Sul, RS, Brazil.
authors.forename: Dannuey Machado
authors.initials: DM
authors.lastname: Cardoso
authors.affiliation: Department of Physiotherapy, Centro Universitário Franciscano, UNIFRA, Santa Maria, RS, Brazil.
authors.forename: Tiago José Nardi
authors.initials: TJ
authors.lastname: Gomes
authors.affiliation: Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.
authors.forename: Tamires Daros dos
authors.initials: TD
authors.lastname: Santos
authors.affiliation: Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.
authors.forename: Marília Severo
authors.initials: MS
authors.lastname: Vicente
authors.affiliation: Cardiac Rehabilitation Program, Hospital Universitário de Santa Maria, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.
authors.forename: Sérgio Nunes
authors.initials: SN
authors.lastname: Pereira
authors.affiliation: Department of Physiotherapy and Rehabilitation, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.
authors.forename: Viviane Acunha
authors.initials: VA
authors.lastname: Barbosa
authors.affiliation: Department of Physiotherapy and Rehabilitation, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil.
authors.forename: Isabella Martins de
authors.initials: IM
authors.lastname: Albuquerque
mesh_terms: D000368:Aged; D001945:Breathing Exercises; D001026:Coronary Artery Bypass / Q000534:rehabilitation*; D015444:Exercise / Q000502:physiology*; D005260:Female; D005652:Functional Residual Capacity; D006801:Humans; D008297:Male; D008875:Middle Aged; D053580:Muscle Strength; D065228:Non-Randomized Controlled Trials as Topic; D010101:Oxygen Consumption; D011446:Prospective Studies; D011788:Quality of Life; D011897:Random Allocation; D055070:Resistance Training / Q000379:methods*; D013997:Time Factors; D016896:Treatment Outcome