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Home-Based Prescribed Pulmonary Exercise in Patients with Stable Chronic Obstructive Pulmonary Disease
Published on: August 24, 2019
Quadriceps weakness contributes to exercise capacity in nonspecific interstitial pneumonia
Fumiko Watanabe1, Hiroyuki Taniguchi, Koji Sakamoto
1Department of Rehabilitation, Tosei General Hospital, Japan.
Respiratory Medicine
|January 15, 2013
Summary
Quadriceps weakness significantly impacts exercise capacity in patients with fibrotic nonspecific interstitial pneumonia (f-NSIP). This muscle dysfunction is a key factor in their exercise intolerance.
Area of Science:
- Pulmonary Medicine
- Exercise Physiology
- Respiratory Diseases
Background:
- Peripheral muscle dysfunction is a known cause of exercise intolerance in chronic lung diseases like idiopathic pulmonary fibrosis.
- Fibrotic nonspecific interstitial pneumonia (f-NSIP) is a major subtype of fibrotic interstitial lung disease.
- The role of peripheral muscle dysfunction in exercise intolerance in f-NSIP requires further elucidation.
Purpose of the Study:
- To investigate the relevance of peripheral muscle dysfunction in patients with f-NSIP.
- To determine the contribution of peripheral muscle dysfunction to exercise intolerance in f-NSIP.
- To explore the relationship between quadriceps force and exercise capacity in f-NSIP.
Main Methods:
- The study included 30 consecutive patients diagnosed with f-NSIP.
- Evaluated exercise capacity using the six-minute walk test (6MWD).
- Assessed respiratory muscle force and peripheral muscle force, specifically quadriceps force (QF).
Main Results:
- Sixteen patients exhibited significantly decreased quadriceps force (QF).
- QF showed a significant positive correlation with exercise capacity (6MWD) after adjusting for sex.
- QF was identified as the sole independent predictor of 6MWD in stepwise multiple regression analysis.
Conclusions:
- Quadriceps weakness is a common finding in patients with f-NSIP.
- Quadriceps force significantly contributes to exercise capacity in individuals with f-NSIP.
- Addressing quadriceps weakness may improve exercise tolerance in f-NSIP patients.
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