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Am J Respir Crit Care Med. 2010 May 15;181(10):1072-7. doi: 10.1164/rccm.200908-1203OC. Epub 2010 Feb 4.

Resistance training prevents deterioration in quadriceps muscle function during acute exacerbations of chronic obstructive pulmonary disease.

Author information

1
Respiratory Rehabilitation and Respiratory Division, UZ Gasthuisberg, Herestraat 49, Leuven, Belgium. thierry.troosters@med.kuleuven.be

Abstract

RATIONALE:

Exacerbations of chronic obstructive pulmonary disease (COPD) acutely reduce skeletal muscle strength and result in long-term loss of functional capacity.

OBJECTIVES:

To investigate whether resistance training is feasible and safe and can prevent deteriorating muscle function during exacerbations of COPD.

METHODS:

Forty patients (FEV(1) 49 +/- 17% predicted) hospitalized with a severe COPD exacerbation were randomized to receive usual care or an additional resistance training program during the hospital admission. Patients were followed up for 1 month after discharge. Primary outcomes were quadriceps force and systemic inflammation. A muscle biopsy was taken in a subgroup of patients to assess anabolic and catabolic pathways.

MEASUREMENTS AND MAIN RESULTS:

Resistance training did not yield higher systemic inflammation as indicated by C-reactive protein levels and could be completed uneventfully. Enhanced quadriceps force was seen at discharge (+9.7 +/- 16% in the training group; -1 +/- 13% in control subjects; P = 0.05) and at 1 month follow-up in the patients who trained. The 6-minute walking distance improved after discharge only in the group who received resistance training (median 34; interquartile range, 14-61 m; P = 0.002). In a subgroup of patients a muscle biopsy showed a more anabolic status of skeletal muscle in patients who followed training. Myostatin was lower (P = 0.03) and the myogenin/MyoD ratio tended to be higher (P = 0.08) in the training group compared with control subjects.

CONCLUSIONS:

Resistance training is safe, successfully counteracts skeletal muscle dysfunction during acute exacerbations of COPD, and may up-regulate the anabolic milieu in the skeletal muscle. Clinical trial registered with www.clinicaltrials.gov (NCT00877084).

PMID:
20133927
DOI:
10.1164/rccm.200908-1203OC
[Indexed for MEDLINE]
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