| Similar Dynamic Hyperinflation during Arm and Leg Exercise at Similar Ventilation in Chronic Obstructive Pulmonary Disease. | |
| | |
MedLine Citation:
|
PMID: 21085035 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
|
PURPOSE: : Patients with chronic obstructive pulmonary disease (COPD) report more dyspnea during arm than during leg exercise. One of the major causes of dyspnea is dynamic hyperinflation (DH), which is caused by airflow limitation as well as increase in ventilation. The aims of our study were to compare DH at equal ventilation (isoventilation) during arm and legwork and to investigate the effects of breathing pattern on DH. METHODS: : Thirteen clinically stable patients with mild to very severe COPD (forced expiratory volume in 1 s = 59% ± 21%) participated in this study. Arm and leg constant work rate (CWR) ergometry were performed in random order with ventilation equal to that at 50% of peak armload. The corresponding leg load of that level of ventilation was determined from the incremental leg test. Respiratory physiology was measured breath-by-breath. Change in inspiratory capacity, measured at rest and at 2-min intervals, was used to reflect DH. RESULTS: : At steady-state isoventilation (37 ± 2 and 36 ± 2 L·min for arm and leg CWR tests, respectively, P > 0.05), armload was 29 ± 5 W and leg load was 52 ± 6 W (P < 0.001). The level of DH, 0.32 ± 0.09 and 0.27 ± 0.08 L during arm and leg exercises, respectively, was not significantly different. However, breathing frequency was greater during arm than during leg exercise (24 ± 1 vs 21 ± 1 breaths per minute, P < 0.01), and the opposite was true for tidal volume (1.56 ± 0.15 vs 1.69 ± 0.14 L, P < 0.01). CONCLUSIONS: : At similar ventilation, we found a similar degree of DH during arm and leg CWR tests in patients with mild to very severe COPD. Although differences in breathing pattern were observed between arm and leg exercises, these did not affect the level of DH. |
| | |
Authors:
|
Jorien D C Hannink; Hanneke A C VAN Helvoort; P N Richard Dekhuijzen; Yvonne F Heijdra |
Related Documents
:
|
12904635 - Effects of different stepwise reduction taper protocols on cycling performance. 1921675 - Lower thermic effect of a meal post-exercise in aerobically trained and resistance-trai... 18434735 - Training, detraining and retraining effects after a water-based exercise program in pat... 1880885 - Group- vs home-based exercise training in healthy older men and women. a community-base... 1602935 - The blood pressure response to exercise in anabolic steroid users. 17881615 - Therapeutic potential of synchronized gastric electrical stimulation for gastroparesis:... |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Medicine and science in sports and exercise Volume: 43 ISSN: 1530-0315 ISO Abbreviation: Med Sci Sports Exerc Publication Date: 2011 Jun |
Date Detail:
|
Created Date: 2011-05-17 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8005433 Medline TA: Med Sci Sports Exerc Country: United States |
Other Details:
|
Languages: eng Pagination: 996-1001 Citation Subset: IM; S |
Affiliation:
|
Department of Pulmonary Diseases, Radboud University Nijmegen Medical Centre, Nijmegen, THE NETHERLANDS. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Validation of a talking pedometer for adults with visual impairment.
Next Document: Sixteen weeks of exercise reduces C-reactive protein levels in young women.