Published in COPD on April 01, 2009
A review of accelerometry-based wearable motion detectors for physical activity monitoring. Sensors (Basel) (2010) 4.89
A review of wearable sensors and systems with application in rehabilitation. J Neuroeng Rehabil (2012) 3.20
Physical inactivity in patients with COPD, a controlled multi-center pilot-study. Respir Med (2010) 2.06
Standardizing the analysis of physical activity in patients with COPD following a pulmonary rehabilitation program. Chest (2014) 1.04
Daily step counts in a US cohort with COPD. Respir Med (2012) 0.94
Assessing the Impact of Tiotropium on Lung Function and Physical Activity in GOLD Stage II COPD Patients who are Naïve to Maintenance Respiratory Therapy: A Study Protocol. Open Respir Med J (2011) 0.91
Clinically meaningful change estimates for the six-minute walk test and daily activity in individuals with chronic heart failure. Cardiopulm Phys Ther J (2013) 0.88
Nitrate's effect on activity tolerance in heart failure with preserved ejection fraction trial: rationale and design. Circ Heart Fail (2015) 0.87
Exploring patterns of accelerometry-assessed physical activity in elderly people. Int J Behav Nutr Phys Act (2014) 0.84
CARER: efficient dynamic sensing for continuous activity monitoring. Conf Proc IEEE Eng Med Biol Soc (2011) 0.79
Physical activity monitoring: a new outcome facing many challenges, but yielding promising results. COPD (2009) 0.76
Telemonitoring of Daily Activity and Symptom Behavior in Patients with COPD. Int J Telemed Appl (2012) 0.76
Diurnal profiles of pedometer-determined physical activity in chronically ill and mobility-limited older adults: a cross-sectional study. BMC Public Health (2014) 0.75
Spirometric reference values from a sample of the general U.S. population. Am J Respir Crit Care Med (1999) 29.97
The body-mass index, airflow obstruction, dyspnea, and exercise capacity index in chronic obstructive pulmonary disease. N Engl J Med (2004) 18.60
Conducting accelerometer-based activity assessments in field-based research. Med Sci Sports Exerc (2005) 9.22
American College of Sports Medicine Position Stand. The recommended quantity and quality of exercise for developing and maintaining cardiorespiratory and muscular fitness, and flexibility in healthy adults. Med Sci Sports Exerc (1998) 8.55
Defining accelerometer thresholds for activity intensities in adolescent girls. Med Sci Sports Exerc (2004) 6.75
Imputation of missing data when measuring physical activity by accelerometry. Med Sci Sports Exerc (2005) 4.14
Accelerometer use in physical activity: best practices and research recommendations. Med Sci Sports Exerc (2005) 4.12
Risk factors of readmission to hospital for a COPD exacerbation: a prospective study. Thorax (2003) 4.02
Characteristics of physical activities in daily life in chronic obstructive pulmonary disease. Am J Respir Crit Care Med (2005) 3.58
Sources of variance in daily physical activity levels as measured by an accelerometer. Med Sci Sports Exerc (2002) 3.51
Bodies in motion: monitoring daily activity and exercise with motion sensors in people with chronic pulmonary disease. J Rehabil Res Dev (2004) 3.50
Branched equation modeling of simultaneous accelerometry and heart rate monitoring improves estimate of directly measured physical activity energy expenditure. J Appl Physiol (1985) (2003) 3.50
Evaluation of the SenseWear Pro Armband to assess energy expenditure during exercise. Med Sci Sports Exerc (2004) 2.86
Validation of the RT3 triaxial accelerometer for the assessment of physical activity. Med Sci Sports Exerc (2004) 2.53
Analysis of the factors related to mortality in chronic obstructive pulmonary disease: role of exercise capacity and health status. Am J Respir Crit Care Med (2002) 2.41
Physical activity and hospitalization for exacerbation of COPD. Chest (2006) 2.24
Psychosocial correlates of physical activity in healthy children. Arch Pediatr Adolesc Med (2001) 2.17
Comparison of pedometer and accelerometer accuracy under controlled conditions. Med Sci Sports Exerc (2003) 2.10
Quantifying physical activity in daily life with questionnaires and motion sensors in COPD. Eur Respir J (2006) 1.77
Comparison of activity monitors to estimate energy cost of treadmill exercise. Med Sci Sports Exerc (2004) 1.76
Quantitating physical activity in COPD using a triaxial accelerometer. Chest (2000) 1.75
Technical variability of the RT3 accelerometer. Med Sci Sports Exerc (2003) 1.28
Mortality predictors in disabling chronic obstructive pulmonary disease in old age. Age Ageing (2002) 1.26
Intermonitor variability of the RT3 accelerometer during typical physical activities. Med Sci Sports Exerc (2004) 1.22
Can individualized rehabilitation improve functional independence in elderly patients with COPD? Chest (2005) 1.20
Variables related to increased mortality following out-patient pulmonary rehabilitation. Eur Respir J (1996) 1.15
Walking activity measured by accelerometry during respiratory rehabilitation. J Cardiopulm Rehabil (2003) 1.08
A profile of daily activity in chronic obstructive pulmonary disease. J Cardiopulm Rehabil (2005) 1.08
Physical activity and its determinants in severe chronic obstructive pulmonary disease. Med Sci Sports Exerc (2004) 1.07
Functional status and survival following pulmonary rehabilitation. Chest (2000) 1.05
Monitoring daily activity during pulmonary rehabilitation using a triaxial accelerometer. J Cardiopulm Rehabil (2003) 1.04
Activity monitors can detect brisk walking in patients with chronic obstructive pulmonary disease. J Cardiopulm Rehabil (2001) 1.02
Correlates of physical activity in chronic obstructive pulmonary disease. Nurs Res (2001) 1.00
Effect of impact exercise on physical performance and cardiovascular risk factors. Med Sci Sports Exerc (2007) 0.93
Azithromycin for prevention of exacerbations of COPD. N Engl J Med (2011) 8.66
Pulmonary Rehabilitation: Joint ACCP/AACVPR Evidence-Based Clinical Practice Guidelines. Chest (2007) 5.01
An official American Thoracic Society/European Respiratory Society statement: key concepts and advances in pulmonary rehabilitation. Am J Respir Crit Care Med (2013) 4.49
A Randomized Trial of Long-Term Oxygen for COPD with Moderate Desaturation. N Engl J Med (2016) 3.99
Simvastatin for the prevention of exacerbations in moderate-to-severe COPD. N Engl J Med (2014) 3.51
A placebo-controlled, randomized trial of mesenchymal stem cells in COPD. Chest (2013) 2.71
Vitamin D levels and risk of acute exacerbations of chronic obstructive pulmonary disease: a prospective cohort study. Am J Respir Crit Care Med (2011) 2.64
Older men are as responsive as young men to the anabolic effects of graded doses of testosterone on the skeletal muscle. J Clin Endocrinol Metab (2004) 2.47
Pulmonary rehabilitation in chronic obstructive pulmonary disease. Am J Respir Crit Care Med (2005) 1.97
Benefits of supplemental oxygen in exercise training in nonhypoxemic chronic obstructive pulmonary disease patients. Am J Respir Crit Care Med (2003) 1.93
Effects of testosterone and resistance training in men with chronic obstructive pulmonary disease. Am J Respir Crit Care Med (2004) 1.91
Coronary artery and thoracic calcium on noncontrast thoracic CT scans: comparison of ungated and gated examinations in patients from the COPD Gene cohort. J Cardiovasc Comput Tomogr (2010) 1.91
The effects of volatile salivary acids and bases on exhaled breath condensate pH. Am J Respir Crit Care Med (2005) 1.85
Indicator dilution measurements of extravascular lung water: basic assumptions and observations. Am J Physiol Lung Cell Mol Physiol (2008) 1.74
An official American Thoracic Society/European Respiratory Society statement: update on limb muscle dysfunction in chronic obstructive pulmonary disease. Am J Respir Crit Care Med (2014) 1.73
A treadmill ramp protocol using simultaneous changes in speed and grade. Med Sci Sports Exerc (2003) 1.69
Predictors of chronic obstructive pulmonary disease exacerbation reduction in response to daily azithromycin therapy. Am J Respir Crit Care Med (2014) 1.68
Testosterone dose-dependently increases maximal voluntary strength and leg power, but does not affect fatigability or specific tension. J Clin Endocrinol Metab (2003) 1.57
Pathophysiology of dyspnea in chronic obstructive pulmonary disease: a roundtable. Proc Am Thorac Soc (2007) 1.56
Testosterone-induced increase in muscle size in healthy young men is associated with muscle fiber hypertrophy. Am J Physiol Endocrinol Metab (2002) 1.54
Skeletal muscle mRNA for IGF-IEa, IGF-II, and IGF-I receptor is decreased in sedentary chronic hemodialysis patients. Kidney Int (2005) 1.51
Cluster analysis in the COPDGene study identifies subtypes of smokers with distinct patterns of airway disease and emphysema. Thorax (2014) 1.48
Exhaled breath condensates: analyzing the expiratory plume. Am J Respir Crit Care Med (2012) 1.45
Megestrol acetate stimulates weight gain and ventilation in underweight COPD patients. Chest (2002) 1.45
Counterpoint: Is an increase in FEV₁ and/or FVC ≥ 12% of control and ≥ 200 mL the best way to assess positive bronchodilator response? No. Chest (2014) 1.42
Sinusoidal high-intensity exercise does not elicit ventilatory limitation in chronic obstructive pulmonary disease. Exp Physiol (2013) 1.41
Effect of indacaterol on exercise endurance and lung hyperinflation in COPD. Respir Med (2011) 1.41
Constant work rate exercise testing: a tricky measure of exercise tolerance. COPD (2009) 1.40
Physiologic effects of an ambulatory ventilation system in chronic obstructive pulmonary disease. Am J Respir Crit Care Med (2013) 1.39
Dose-dependent effects of testosterone on sexual function, mood, and visuospatial cognition in older men. J Clin Endocrinol Metab (2005) 1.28
Epithelial lining fluid solute concentrations in chronic obstructive lung disease patients and normal subjects. J Appl Physiol (1985) (2005) 1.25
Exercise in maintenance hemodialysis patients induces transcriptional changes in genes favoring anabolic muscle. J Am Soc Nephrol (2007) 1.21
Exercise training decreases ventilatory requirements and exercise-induced hyperinflation at submaximal intensities in patients with COPD. Chest (2005) 1.19
Endurance exercise training during haemodialysis improves strength, power, fatigability and physical performance in maintenance haemodialysis patients. Nephrol Dial Transplant (2005) 1.19
Aclidinium bromide improves exercise endurance and lung hyperinflation in patients with moderate to severe COPD. Respir Med (2010) 1.13
Clinical and radiographic correlates of hypoxemia and oxygen therapy in the COPDGene study. Respir Med (2011) 1.12
Azithromycin: We're there! Am J Respir Crit Care Med (2014) 1.07
Metabolic and morphometric profile of muscle fibers in chronic hemodialysis patients. J Appl Physiol (1985) (2011) 1.04
Improvement in self-reported exercise participation with the combination of tiotropium and rehabilitative exercise training in COPD patients. Int J Chron Obstruct Pulmon Dis (2008) 1.01
An Official American Thoracic Society/European Respiratory Society Policy Statement: Enhancing Implementation, Use, and Delivery of Pulmonary Rehabilitation. Am J Respir Crit Care Med (2015) 1.00
Mapping and manipulating the Mycobacterium tuberculosis transcriptome using a transcription factor overexpression-derived regulatory network. Genome Biol (2014) 0.99
Superior immune response to protein-conjugate versus free pneumococcal polysaccharide vaccine in chronic obstructive pulmonary disease. Am J Respir Crit Care Med (2009) 0.99
Macrolide antibiotics and the risk of cardiac arrhythmias. Am J Respir Crit Care Med (2014) 0.98
Utility of exhaled breath condensates in chronic obstructive pulmonary disease: a critical review. Curr Opin Pulm Med (2005) 0.97
Skeletal muscle adaptations to testosterone and resistance training in men with COPD. J Appl Physiol (1985) (2007) 0.95
Assessment of exhaled breath condensate pH. Am J Respir Crit Care Med (2011) 0.94
Changes in body composition in patients with chronic obstructive pulmonary disease: do they influence patient-related outcomes? Ann Nutr Metab (2013) 0.91
Pulmonary rehabilitation: WHAT WE KNOW AND WHAT WE NEED TO KNOW. J Cardiopulm Rehabil Prev (2009) 0.89
Effect of exercise on mRNA levels for growth factors in skeletal muscle of hemodialysis patients. J Ren Nutr (2006) 0.89
Effect of hyperoxia on gas exchange and lactate kinetics following exercise onset in nonhypoxemic COPD patients. Chest (2002) 0.87
Long-term comparative immunogenicity of protein conjugate and free polysaccharide pneumococcal vaccines in chronic obstructive pulmonary disease. Clin Infect Dis (2012) 0.86
Effects of tiotropium on hyperinflation and treadmill exercise tolerance in mild to moderate chronic obstructive pulmonary disease. Ann Am Thorac Soc (2014) 0.84
Label-free proteomics and systems biology analysis of mycobacterial phagosomes in dendritic cells and macrophages. J Proteome Res (2011) 0.83
Randomized trial of zileuton for treatment of COPD exacerbations requiring hospitalization. COPD (2011) 0.83
Comment on 'the effect of temperature on exhaled breath condensate collection'. J Breath Res (2012) 0.82
Breath-by-breath quantification of progressive airflow limitation during exercise in COPD: a new method. Respir Med (2010) 0.81
Influence of lightweight ambulatory oxygen on oxygen use and activity patterns of COPD patients receiving long-term oxygen therapy. COPD (2012) 0.81
Reduction of hyperinflation by pharmacologic and other interventions. Proc Am Thorac Soc (2006) 0.81
Testosterone and resistance training effects on muscle nitric oxide synthase isoforms in COPD men. Respir Med (2011) 0.80
Multi-study integration of brain cancer transcriptomes reveals organ-level molecular signatures. PLoS Comput Biol (2013) 0.79
Pulmonary rehabilitation for COPD. Respir Med (2005) 0.79
Common genetic variants associated with resting oxygenation in chronic obstructive pulmonary disease. Am J Respir Cell Mol Biol (2014) 0.78
The NHLBI COPD clinical research network. Pulm Pharmacol Ther (2004) 0.78
Supervised high intensity continuous and interval training vs. self-paced training in COPD. Respir Med (2007) 0.78
Interpreting results from clinical trials: understanding minimal clinically important differences in COPD outcomes. COPD (2005) 0.78
Increased difference between slow and forced vital capacity is associated with reduced exercise tolerance in COPD patients. BMC Pulm Med (2014) 0.78
Mitochondrial disorders and exertional intolerance: controversy continues. Am J Respir Crit Care Med (2002) 0.77
Tumour necrosis factor receptor-75 and risk of COPD exacerbation in the azithromycin trial. Eur Respir J (2013) 0.76
The mechanism of the exercise hyperpnea: the ultrasecret revisited. Am J Respir Crit Care Med (2012) 0.76
Clarifying the equation for modeling of VO2 kinetics above the lactate threshold. J Appl Physiol (1985) (2010) 0.76
Noninvasive assessment of normality of VD/VT in clinical cardiopulmonary exercise testing utilizing incremental cycle ergometry. Eur J Appl Physiol (2012) 0.75
Limitation to exercise tolerance in chronic obstructive pulmonary disease: look to the muscles of ambulation. Am J Respir Crit Care Med (2003) 0.75
Why conventional exhaled breath condensate pH studies cannot provide reliable estimates of airway acidification. Chest (2011) 0.75
Rebuttal from Drs Hansen and Porszasz. Chest (2014) 0.75
COPD therapeutics: picking the low-hanging fruit. COPD (2006) 0.75
In reference to Continuous laryngoscopy exercise test: a method for visualizing laryngeal dysfunction during exercise. Laryngoscope (2007) 0.75
Getting serious about strength training. J Cardiopulm Rehabil (2006) 0.75
Assessing the dose of supplemental oxygen: let us compare methodologies. Respir Care (2005) 0.75
Selecting constant work rates for endurance testing in COPD: the role of the power-duration relationship. COPD (2013) 0.75