Exercise Responses during Incremental and High Intensity and Low Intensity Steady State Exercise in Patients with Obstructive Lung Disease and Normal Control Subjects

Matthews, Joseph L.; Bush, Bruce A.; Ewald, Frank W.

doi:10.1378/chest.96.1.11

Cited by 30 publications

(16 citation statements)

References 23 publications

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“…The number of daily movements correlated quite well with the level of FEV1 in the patients with COPD. The level of correlation was generally better than that reported between walking distance and FEV1 [2,[10][11][12] and comparable to correlations between peak cycleergometer performance and spirometry [13,14]. In the patients with ventilatory failure, daily activity was correlated weakly with impaired PI,max and Pa,CO 2 .…”

Section: Discussionsupporting

confidence: 50%

Evaluation of a movement detector to measure daily activity in patients with chronic lung disease

Schönhofer¹,

Ardes²,

Geibel³

et al. 1997

Eur Respir J

160

113

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This study was designed to evaluate the performance of movement detectors (pedometers) in measuring daily activity of patients with chronic lung disease. Three groups of subjects were studied: group 1: 25 patients with stable nonhypercapnic chronic obstructive pulmonary disease (COPD) (forced expiratory volume in one second (FEV1) = 47+/-9% predicted) studied twice, one month apart; group 2: 25 patients with chronic respiratory failure studied before and three months after nasal nocturnal mechanical ventilation; and group 3: 25 normal healthy subjects studied once. The median level of activity in the healthy subjects (group 3) was three times greater than in either group of patients (groups 1 and 2). Activity levels were not correlated with age, sex or employment status. The repeatability of the activity counts in the nonhypercapnic COPD patients was high (intraclass correlation coefficient=0.94) and in these patients activity correlated significantly with FEV1 (r=0.54, p=0.006). In the respiratory failure patients, daytime arterial carbon dioxide pressure (Pa,CO2) improved following nasal nocturnal mechanical ventilation (NMV) (pre NMV: 8.5+/-1.2 kPa; post NMV: 6.2+/-0.5 kPa), health status improved (p<0.004) and daily movement count doubled (p<0.0001). This increase correlated with change in Pa,CO2 (r-0.53, p=0.006), but not with improved health status. We conclude that motion detectors may provide repeatable measures of daily activity that are related to physiological impairment and improvement following treatment. Activity counts appear to be complementary to estimates of exercise limitation obtained using health questionnaires.

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Section: Discussionsupporting

confidence: 50%

Evaluation of a movement detector to measure daily activity in patients with chronic lung disease

Schönhofer¹,

Ardes²,

Geibel³

et al. 1997

Eur Respir J

160

113

View full text Add to dashboard Cite

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“…However, there is less time to attain a steady state during the shorter stages of an incremental test. In a study by Matthews et al 16 a constant work rate test at 75% of the maximum work load provoked a higher heart rate and ṼO 2 than the peak values measured during an incremental test in patients with COPD and in a normal control group. These findings suggest that an incremental test may not always be the best method of obtaining the highest cardiorespiratory values for some patients.…”

Section: Developmental Limbmentioning

confidence: 91%

The endurance shuttle walk: a new field test for the assessment of endurance capacity in chronic obstructive pulmonary disease

Revill

Morgan

Singh

et al. 1999

Thorax

377

176

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Background-The purpose of this study was to develop an externally controlled, constant paced field walking test to assess endurance capacity in patients with chronic obstructive pulmonary disease (COPD). There were four objectives: (1) to develop a protocol; (2) to compare treadmill and shuttle walk tests of endurance capacity; (3) to examine the repeatability of the endurance shuttle walk test; and (4) to compare the sensitivity to pulmonary rehabilitation of endurance and incremental shuttle walk tests. Methods-The test was designed to complement the incremental shuttle walk test (ISWT) using the same 10 m shuttle course and an audio signal to control pace. The intensity of the field endurance test was related to a percentage of each patient's maximum field exercise performance assessed by the ISWT. A number of cassette tapes were prerecorded with a range of audio signal frequencies to dictate walking speeds between 1.80 and 6.00 km/h. In the first limb of the study 10 patients with COPD (mean (SD) forced expiratory volume in one second (FEV 1 ) 1.0 (0.36) l, 35% predicted) performed three endurance shuttle walk tests (ESWTs) and three treadmill endurance tests. The walking speeds were calculated to elicit 75%, 85%, and 95% of each patient's maximum ISWT performance for the field tests and measured peak oxygen consumption for the treadmill tests. In a separate group of patients the repeatability of the ESWT at an intensity of 85% of the ISWT performance was evaluated. Finally, the ESWT (at the 85% intensity) and the ISWT were performed at the start of a five week control period and at the start and end of a seven week pulmonary rehabilitation programme in 21 patients with COPD (mean FEV 1 0.80 (0.18) l). Results-The mean (SE) times achieved during the ESWT were 13.1 (2.3), 10.2 (2.5), and 5.3 (1.7) min for the walks at 75%, 85%, and 95% intensities, respectively. Patients tended to walk for longer on the treadmill than during the field tests at all intensities, but there were no significant diVerences between the end of test heart rates or Borg ratings of breathlessness or perceived exertion. Following one practice ESWT at the 85% intensity, the mean diVerence and limits of agreement (2SD) between tests 2 and 3 was +15 (42) s (p>0.05). There was no significant change in performance on either test following the five week control period prior to rehabilitation. Following rehabilitation the ESWT duration increased by 160 (24)% and the ISWT distance increased by 32 (11)% (eVect sizes 2.90 and 0.41, respectively). Conclusions-The ESWT was simple to perform, acceptable to all patients, and exhibited good repeatability after one practice walk. The test showed major improvement following rehabilitation and was more sensitive to change than the field test of maximal capacity. (Thorax 1999;54:213-222) Keywords: endurance shuttle walk test; chronic obstructive pulmonary disease; field exercise testing Most activities of daily living represent exertion at submaximal exercise levels, so a measure of the ability ...

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“…The order of the sets was randomized and 30 min rest periods between the sets were performed. The workload and cadence for the test were set at 50% of VO 2peak (26,27) and 70-75 rpm, respectively, since they have not a high metabolic demand. In addition, subjects held the same posture (i.e., upright sitting position) to eliminate the metabolic cost impact of modifying the position.…”

Section: Methodsmentioning

confidence: 99%

Efectos de un dispositivo de restricción ventilatoria nasal sobre la ventilación pulmonar e intercambio gaseoso durante el ejercicio en personas sanas

González-Montesinos¹,

Ponce-González²,

Vicente-Campos³

et al. 2016

Nutr Hosp

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-Piñero J. Effects of a nasal ventilator restriction device on lung ventilation and gas exchange during exercise in healthy subjects. Nutr Hosp 2016;33: [444][445][446][447][448][449][450] Effects of a nasal ventilator restriction device on lung ventilation and gas exchange during exercise in healthy subjects ResumenIntroducción y objetivos: un dispositivo llamado FeelBreathe ® (FB) se ha diseñado, desarrollado y patentado para el entrenamiento de la musculatura inspiratoria (IMT). Para examinar los efectos de FB en la ventilación pulmonar y el intercambio gaseoso durante el ejercicio, se tomaron medidas de 27 voluntarios varones sanos entrenados (edad: 32,5 ± 7,2 años). Métodos: al inicio del estudio se midieron tanto la presión inspiratoria máxima estática (PIM) y la capacidad pulmonar mediante espirometría. Seguidamente, se realizó un test incremental en cicloergómetro para determinar el VO 2 pico. Cada sujeto, tres días más tarde, realizó aleatoriamente tres pruebas idénticas submáximas en cicloergómetro a una intensidad comprendida al 50% entre los umbrales ventilatorios bajo tres condiciones de respiración diferentes: a) respiración oronasal (ONB), b) respiración nasal (NB) y c) la respiración nasal a través del FB. Resultados: la prueba con FB mostró una ventilación minuto (VE) y una frecuencia respiratoria (BF) inferior que en las pruebas de NB, la cual a su vez tenía menor BF, pero similar VE que ONB (p < 0,001). A pesar de esto, FB obtuvo valores similares de VO 2 , cociente respiratorio (RER), frecuencia cardiaca (HR) y saturación de oxígeno capilar periférica (SpO2) en comparación con NB y ONB. Esto último puede ocurrir debido en parte al aumento del volumen tidal (VT) y el tiempo de expiración (Tex) en FB hasta el mismo nivel que en la prueba de NB, los cuales fueron un 15% y 14% en ambas pruebas, respectivamente, superiores a ONB (p < 0,001). El porcentaje de tiempo de inspiración (Ti/Tot) fue 7% mayor en la prueba de FB en comparación con NB y ONB (p < 0,001). Solamente en la prueba de FB se encontró un aumento de la presión final de la espiración de CO 2 (P ET CO 2 ) y la reducción de la presión final de la espiración de O 2 (P ET O 2 ) y la fracción de expiración de O 2 (FEO 2 ). Conclusiones: FeelBreathe es un nuevo dispositivo de restricción nasal que estimula los músculos inspiratorios para producir un patrón de respiración más eficiente durante el ejercicio en los seres humanos bien entrenados. AbstractIntroduction and objectives: A device called FeelBreathe ® (FB) has been designed, developed and patented for inspiratory muscle training (IMT). In order to examine the effects of FB on lung ventilation and gas exchange during exercise, 27 trained male healthy volunteers (age: 32.5 ± 7.2 years) were measured. Methods: Maximum static inspiratory pressure (PI max ) and spirometry to determine lung capacity were measured at baseline. We continued with an incremental cycloergometer to determine the VO 2 peak. Three days later, each subject performed randomly three identical submaximal cycloergome...

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Exercise Responses during Incremental and High Intensity and Low Intensity Steady State Exercise in Patients with Obstructive Lung Disease and Normal Control Subjects

Cited by 30 publications

References 23 publications

Evaluation of a movement detector to measure daily activity in patients with chronic lung disease

Evaluation of a movement detector to measure daily activity in patients with chronic lung disease

The endurance shuttle walk: a new field test for the assessment of endurance capacity in chronic obstructive pulmonary disease

Efectos de un dispositivo de restricción ventilatoria nasal sobre la ventilación pulmonar e intercambio gaseoso durante el ejercicio en personas sanas

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