title: Motor function and respiratory capacity in patients with late-onset pompe disease.
abstract: BACKGROUND
  The relationship between skeletal muscle strength and respiratory dysfunction in Pompe disease has not been examined by quantitative methods. We investigated correlations among lower extremity proximal muscle strength, respiratory function, and motor performance.
  
  
  METHODS
  Concentric strength of the knee extensor and flexor muscles was measured with a dynamometer, and pulmonary function was evaluated using spirometry in 7 adult patients. The 6-minute walk test and the 4-step stair-climb test were used for assessing aerobic endurance and anaerobic power, respectively.
  
  
  RESULTS
  Anaerobic motor performance correlated with strength of both thigh muscles. Respiratory function did not correlate with either muscle strength or motor function performance.
  
  
  CONCLUSIONS
  Respiratory and lower extremity proximal muscles could be affected differentially by the disease in individual patients. Motor performance is influenced by thigh muscle strength and is less dependent of respiratory capacity in our cohort of ambulatory patients.
authors.affiliation: Department of Neurology, Odense University Hospital, Institute of Clinical Research, University of Southern Denmark, Odense, Denmark.
authors.forename: Zsolt
authors.initials: Z
authors.lastname: Illes
authors.forename: Andrea
authors.initials: A
authors.lastname: Mike
authors.forename: Anita
authors.initials: A
authors.lastname: Trauninger
authors.forename: Katalin
authors.initials: K
authors.lastname: Várdi
authors.forename: Márk
authors.initials: M
authors.lastname: Váczi
mesh_terms: D000328:Adult; D005260:Female; D006009:Glycogen Storage Disease Type II / Q000175:diagnosis* / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008451:Maximal Voluntary Ventilation / Q000502:physiology*; D008875:Middle Aged; D053580:Muscle Strength / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology*; D015656:Respiratory Mechanics / Q000502:physiology; D012132:Respiratory Muscles / Q000502:physiology*; D013147:Spirometry / Q000379:methods
keywords: Pompe disease; motor function; quantitative dynamometry; respiratory function; thigh muscle