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Effect of endurance training on expiratory flow limitation and dynamic hyperinflation in patients with stable chronic obstructive pulmonary disease

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机构: [1]Department of Respiratory diseases, SUN Yat-sen Memorial Hospital, SUN Yat-sen University, [2]State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, [3]Department of Respiratory Medicine, Zhu Jiang Hospital of Southern Medical University [4]Medical Examination Center, Guangdong Provincial Hospital, Guangzhou, China
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关键词: COPD Dynamic hyperinflation Exercise endurance Exercise training Expiratory flow limitation

摘要:
Background: Expiratory flow limitation (EFL) is the primary pathophysiological hallmark of chronic obstructive pulmonary disease (COPD). However, the effect of lower-extremity endurance training alone on EFL in patients with COPD remains largely unknown. Aim: This study aims to determine the effects of endurance training on EFL and dynamic hyperinflation in patients with stable COPD. Methods: This was a prospective, single-blinded, non-randomised controlled 12-week study recruiting Chinese patients with stable COPD in an endurance training group (n = 15) or a control group (n = 13). Before and at the end of the study, we measured the EFL, pulmonary function, peak inspiratory flow (PIF) and maximum inspiratory pressure (MIP); moreover, the patients underwent a constant work rate exercise test in which Borg dyspnoea scale, tidal breathing flow volume curves and inspiratory capacity (IC) were determined every other minute. Results: Exercise training significantly improved the exercise endurance time (7.00 ± 3.05 vs 18.13 ± 6.44min, P < 0.001), MIP (69.49 ± 16.03 vs 80.18 ± 15.97 cmH2O, P < 0.001) and PIF (3.96 ± 1.01 vs 4.51 ± 1.13L/s, P = 0.014), but not EFL (3.33 ± 0.49 vs 3.40 ± 0.51, P = 0.334). Subjects on training had decreased breathing frequency (26.26 ± 7.13 vs 23.15 ± 5.34 breaths/min, P = 0.002), minute ventilation (30.28 ± 7.52 vs 26.85 ± 4.17L, P = 0.013), tidal peak expiratory flow (1.53 ± 0.22 vs 1.32 ± 0.20 L/s, P = 0.006), mean expiratory flow (0.87 ± 0.19 vs 0.68 ± 0.15 L/s, P = 0.011) and Borg dyspnoea score (7.20 ± 1.15 vs 3.93 ± 1.39, P < 0.001), as well as increased IC (1.50 ± 0.34 vs 1.67 ± 0.45L, P = 0.002), expiratory time (1.47 ± 0.62 vs 1.72 ± 0.62s, P = 0.004) and inspiratory flow reserve (2.05 ± 1.10 vs 2.95 ± 1.19L/s, P = 0.002) at isotime. These changes were not observed in the control group. Conclusion: Endurance training may benefit stable COPD patients in improving exercise endurance, inspiratory muscle strength, ventilatory requirements, exercise-induced hyperinflation and exertional dyspnoea. © 2014 Royal Australasian College of Physicians.

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出版当年[2013]版:
大类 | 4 区 医学
小类 | 3 区 医学:内科
最新[2025]版:
大类 | 4 区 医学
小类 | 4 区 医学:内科
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出版当年[2012]版:
Q2 MEDICINE, GENERAL & INTERNAL
最新[2023]版:
Q2 MEDICINE, GENERAL & INTERNAL

影响因子: 最新[2023版] 最新五年平均 出版当年[2012版] 出版当年五年平均 出版前一年[2011版] 出版后一年[2013版]

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第一作者机构: [1]Department of Respiratory diseases, SUN Yat-sen Memorial Hospital, SUN Yat-sen University, [*1]State Key Laboratory of Respiratory Disease, Guangzhou Medical University, Guang Zhou 510012, China
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通讯机构: [1]Department of Respiratory diseases, SUN Yat-sen Memorial Hospital, SUN Yat-sen University, [*1]State Key Laboratory of Respiratory Disease, Guangzhou Medical University, Guang Zhou 510012, China
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