scholarly journals Ventilation Distribution, Pulmonary Diffusion and Peripheral Muscle Endurance as Determinants of Exercise Intolerance in Elderly Patients With Chronic Obstructive Pulmonary Disease

2018 ◽  
pp. 863-874 ◽  
Author(s):  
A. J. LOPES ◽  
P. S. VIGÁRIO ◽  
A. L. HORA ◽  
C. A. L. DEUS ◽  
M. S. SOARES ◽  
...  

Chronic obstructive pulmonary disease (COPD) is a progressive and disabling disease that has been associated with aging. Several factors may potentially impair performance during exercise in elderly patients with COPD. This study was conducted to evaluate what characteristics related to lung function, peripheral muscle strength and endurance can predict the performance of elderly patients with COPD during cardiopulmonary exercise testing (CPET). Forty elderly patients with COPD underwent resting lung function tests, knee isokinetic dynamometry, and CPET. Three models were developed to explain the variability in peak oxygen uptake (VO2 peak) after controlling for age as an independent confounder. The pulmonary function model showed the highest explained variance (65.6 %); in this model, ventilation distribution (p<0.001) and pulmonary diffusion (0.013) were found to be independent predictors. Finally, the models that included the muscle strength and endurance variables presented explained variances of 51 % and 57.4 %, respectively. In these models that involved muscular dysfunction, however, only the endurance variables were found to be independent predictors (p<0.05). In conclusion, ventilation distribution and pulmonary diffusion, but not the degree of airway obstruction, independently predict CPET performance in elderly patients with COPD. In addition, peripheral muscle endurance, but not strength, also predicts CPET performance in these subjects.


2010 ◽  
Vol 5 ◽  
Author(s):  
Deniz Inal-Ince ◽  
Sema Savci ◽  
Melda Saglam ◽  
Ebru Calik ◽  
Hulya Arikan ◽  
...  

Background and aims: Fatigue is associated with longitudinal ratings of health in patients with chronic obstructive pulmonary disease (COPD). Although the degree of airflow obstruction is often used to grade disease severity in patients with COPD, multidimensional grading systems have recently been developed. The aim of this study was to investigate the relationship between perceived and actual fatigue level and multidimensional disease severity in patients with COPD. Materials and methods: Twenty-two patients with COPD (aged 52-74 years) took part in the study. Multidimensional disease severity was measured using the SAFE and BODE indices. Perceived fatigue was assessed using the Fatigue Severity Scale (FSS) and the Fatigue Impact Scale (FIS). Peripheral muscle endurance was evaluated using the number of sit-ups, squats, and modified push-ups that each patient could do. Results: Thirteen patients (59%) had severe fatigue, and their St George’s Respiratory Questionnaire scores were significantly higher (p < 0.05). The SAFE index score was significantly correlated with the number of sit-ups, number of squats, FSS score and FIS score (p < 0.05). The BODE index was signif- icantly associated with the numbers of sit-ups, squats and modified push-ups, and with the FSS and FIS scores (p < 0.05). Conclusions: Peripheral muscle endurance and fatigue perception in patients with COPD was related to multidimensional disease severity measured with both the SAFE and BODE indices. Improvements in perceived and actual fatigue levels may positively affect multidimensional disease severity and health status in COPD patients. Further research is needed to investigate the effects of fatigue perception and exercise training on patients with different stages of multidimensional COPD severity.



2000 ◽  
Vol 7 (3) ◽  
pp. 282-285 ◽  
Author(s):  
Joseph Milic-Emili

During the past half-century, many studies have investigated the correlation of exercise tolerance to routine lung function in patients with obstructive pulmonary disease. In virtually all of these studies, the degree of airway obstruction was assessed in terms of forced expiratory volume in 1 s (FEV1) and forced vital capacity (FVC). Because in most studies only a weak correlation was found between exercise tolerance and degree of airway obstruction, it has been concluded that factors other than lung function impairment (eg, deconditioning and peripheral muscle dysfunction) play a predominant role in limiting exercise capacity in patients with chronic airway obstruction. Recent work, however, suggests that in patients with chronic obstructive pulmonary disease, the inspiratory capacity is a more powerful predictor of exercise tolerance than FEV1 and FVC.



Author(s):  
Anne-Kathrin Rausch-Osthoff ◽  
Malcolm Kohler ◽  
Noriane A. Sievi ◽  
Christian F. Clarenbach ◽  
Arnoldus J.R. Van Gestel

Background: Resistance training of peripheral muscles has been recommended in order to increase muscle strength in patients with Chronic Obstructive Pulmonary Disease (COPD). However, whether peripheral muscle strength is associated with exercise performance (EP) and physical activity in daily life (PADL) in these patients needs to be investigated. The aim of this study is to evaluate whether strength of the quadriceps muscle (QS) is associated with EP and daily PADL in patients with COPD. Methods: We studied patients with COPD (GOLD A-D) and measured maximal isometric strength of the left QS. PADL was measured for 7 days with a SenseWear-Pro® accelerometer. EP was quantified by the 6-minute walk distance (6MWD), the number of stands in the Sit-to-Stand Test (STST), and the handgrip-strength. Univariate and multivariate analyses were used to examine possible associations between QS, PADL and EP. Results: In 27 patients with COPD with a mean (SD) FEV1 of 37.6 (17.6)% predicted, QS was associated with 6MWD, STST, and handgrip-strength but not with PADL. Multiple linear regression analyses showed that QS was independently associated with the 6MWD (β = 0.42, 95% CI 0.09 to 0.84, p = 0.019), STST (β = 0.50, 95% CI 0.11 to 0.86, p = 0.014) and with handgrip-strength (β = 0.45, 95% CI 0.05 to 0.84, p = 0.038). Conclusions: Peripheral muscle strength may be associated with exercise performance but not with physical activity in daily life. This may be due to the fact that EP tests evaluate patients’ true abilities while PADL accelerometers may not.





2011 ◽  
Vol 31 (1) ◽  
pp. 11-24 ◽  
Author(s):  
Priscila Games Robles ◽  
Sunita Mathur ◽  
Tania Janaudis-Fereira ◽  
Thomas E. Dolmage ◽  
Roger S. Goldstein ◽  
...  




2010 ◽  
Vol 15 (3) ◽  
pp. 135-134 ◽  
Author(s):  
Diego Marmorato Marino ◽  
Kamilla Tays Marrara ◽  
Daniela Ike ◽  
Antônio Delfino De Oliveira ◽  
Maurício Jamami ◽  
...  




2021 ◽  
Vol 18 (23) ◽  
pp. 714
Author(s):  
Sarawut Jansang ◽  
Parunkul Tungsukruthai ◽  
Sorachai Srisuma ◽  
Kusuma Sriyakul ◽  
Aungkana Krajarng ◽  
...  

Chronic obstructive pulmonary disease (COPD) is the third-highest cause of death in the world, also true in Thailand. There are various methods to treat COPD such as medication and non-drug therapies for respiratory rehabilitation. The aim of this study is to investigate the effectiveness of pursed-lip breathing (PLB) by using a windmill toy in COPD patients. The participants in this randomized controlled trial study were 60 to 75 years old. The total number of 46 participants were equally divided into 2 groups: The intervention group and the control group (23 participants each). The intervention group used breathing training through a windmill toy, whereas the control group received training in standard breathing patterns. The training was performed over sessions in 1 week. Lung function, respiratory muscle strength, and 6-minute walk test (6MWT) were recorded at baseline, and between 6 - 12 weeks (follow-up). The intervention group and the control group improved significantly in lung function and muscle strength (p < 0.05). In addition, 6MWT in the intervention group increased significantly when compared to the control group (p < 0.05) at week 12. In conclusion, the PLB using a windmill toy is a new form of breathing training that is effective in promoting the strength of the muscles used for breathing, lung performance, and cardiovascular function in COPD patients. HIGHLIGHTS The use of windmill toys is a new form of breathing exercise that is effective in strengthening Using innovative models applied in medicine and public health to promote prevention of severe disease The greatest benefit of pulmonary function training is that patients have a better quality of life and longer life



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