title: Relationship between cough strength and functional level in elderly.
abstract: BACKGROUND
  Respiratory muscle strength is influenced by aging.
  
  
  OBJECTIVE
  To assess, in a healthy elderly population, the influence of physical activity and functional performance on the pulmonary function parameters, on respiratory muscle strength and on coughing.
  
  
  METHODS
  Observation study that sixty one elderly with age equal or more than 60 years (72.3 ± 7.2 years), with normal spirometry were included. Maximal Inspiratory Pressure (MIP), Maximal Expiratory Pressure (MEP), Peak Expiratory Flow (PEF), Peak Cough Flow (PCF) and Human Activity Profile (HAP) were evaluated. The elderly were separated in two groups (active and moderately active) according to HAP. Student`s test was used for univariate analysis and regression analysis models was used for multivariate analysis.
  
  
  RESULTS
  Elderly participants who were classified as active presented on average 13.5 cmH₂O higher MEP (88 ± 21.4 cmH₂O), and 16.2 cmH₂O higher MIP (76 ± 17.7 cmH₂O). Maximal respiratory pressure decreases 1 cmH₂O per year. The PEF and PCF were higher for male (p < 0.001) and active elderly (p = 0.046 e p = 0.004 respectively). A positive correlation was observed between HAP and the following variables: MEP MIP and PCF (r = 0.527, p < 0.001; r = 0.498, p < 0.001 and r = 0.365, p = 0.004, respectively).
  
  
  CONCLUSIONS
  The active life style can positively affect the respiratory muscle strength and PCF values. Aging is associated to respiratory muscle strength reduction (both inspiratory and expiratory). Women showed lower PEmax.
authors.affiliation: Physical Therapy Department, Pontifícia Universidade Católica de Minas Gerais (PUC Minas), Belo Horizonte (MG), Brazil.
authors.forename: Fábia S
authors.initials: FS
authors.lastname: Freitas
authors.forename: Cássio C
authors.initials: CC
authors.lastname: Ibiapina
authors.forename: Cristina G
authors.initials: CG
authors.lastname: Alvim
authors.forename: Raquel R
authors.initials: RR
authors.lastname: Britto
authors.forename: Verônica F
authors.initials: VF
authors.lastname: Parreira
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D003371:Cough / Q000503:physiopathology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009043:Motor Activity; D053580:Muscle Strength; D012129:Respiratory Function Tests; D012132:Respiratory Muscles / Q000502:physiology*; D012720:Severity of Illness Index