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Abstract: Poster Presentations |

RELATIONSHIP OF RESPIRATORY AND QUADRICEPS MUSCLE STRENGTH TO THE EXERCISE CAPACITY IN CHRONIC OBSTRUCTIVE PULMONARY DISEASE PATIENTS FREE TO VIEW

Andréia T. Silva; Anelise Dumke, MSc; Adriane S. Pasqualoto, MSc; Daiane Falkembach; Sérgio S. Menna Barreto, MD; Marli M. Knorst, MD*
Author and Funding Information

Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil


Chest


Chest. 2009;136(4_MeetingAbstracts):124S. doi:10.1378/chest.136.4_MeetingAbstracts.124S-a
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Abstract

PURPOSE:  To study the relationship among respiratory and lower limb muscle strength and exercise capacity in patients with chronic obstructive pulmonary disease(COPD).

METHODS:  We studied 15 patients with COPD (9 men, 64.4 ± 8.2 years). All patients performed spirometry and assessment of respiratory muscle strength. Quadriceps strength and endurance was evaluated by the one-repetition maximum test (1RM) and one-minute sit-to-stand test. The exercise capacity was assessed through the six-minute walk test.

RESULTS:  Mean forced vital capacity (FVC), forced expiratory volume in 1 second (FEV1) and FVC/FEV1 were 70.7 ± 16.9%, 42.6 ± 19.5% and 47.2 ± 13.6, respectively. The maximal inspiratory pressure (PImax) was −78.2 ± 24.4 cmH2O and the maximal expiratory pressure (PEmax) was 98.5 ± 26.4 cmH2O. The mean values of 1RM test and sit-to-stand test were 17.2 ± 7.4 kg and 26.4 ± 5.1 repetitions, respectively. The walked distance was 426 ± 68.1 m. The walked distance was associated with PImax (r = −0.615; p = 0.01) and PEmax (r = 0.641; p = 0.01); there was no association between walked distance and quadriceps muscle strength (p = 0.50).

CONCLUSION:  We conclude that maximal respiratory pressures but not quadriceps muscle strength correlated with the exercise performance measured by walked distance in COPD patients.

CLINICAL IMPLICATIONS:  Further studies are needed to understand the influence of respiratory and quadriceps muscle strength on exercise performance in COPD patients.

DISCLOSURE:  Marli Knorst, No Financial Disclosure Information; No Product/Research Disclosure Information

Wednesday, November 4, 2009

12:45 PM - 2:00 PM


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