Source: Annual Congress 2010 - Exercise training: new groups, new methods and outcomes
Disease area: Airway diseases

Abstract

Objective: To propose a predictive equation of cycle ergometry maximal work rate (Wmax) in patients with chronic obstructive pulmonary disease (COPD) based on the product of 6-minute walking test (6MWT) and fat-free mass (FFM), and to compare it with a previously proposed equation based on the work performed during the 6MWT (i.e., the product of 6MWT and body weight). Methods: Fifty-three patients with COPD (30 men; FEV₁ 45±15%predicted; BMI 27±5kg/m²) were submitted to spirometry, bioelectrical impedance, 6MWT and maximal cycle ergometry incremental test. Three Wmax were produced: the Wmax_real (obtained during the maximal cycle ergometry test), the estimated Wmax_6MWT*BW (obtained from the product of 6MWT and body weight) and the estimated Wmax_6MWT*FFM (obtained from the product of 6MWT and FFM). Results: The equation derived from a regression model to estimate Wmax_6MWT*FFM was: -27.9717 + 3.7792*(6MWT*FFM). Correlation of the Wmax_real was higher with Wmax_6MWT*FFM (r=0.65) than with Wmax_6MWT*BW (r=0.53). Furthermore, there was no difference between the estimated Wmax_6MWT*FFM (41[29-50]watts) and the Wmax_real (40[20-50]watts) (p=0.88), whereas Wmax_6MWT*BW (60[52-69]watts) showed significant overestimation in comparison to the Wmax_real (p<0.0001). Conclusion: In patients with COPD, maximal work rate in cycle ergometry is better estimated by the equation including the product of 6MWT and fat-free mass than by a previously proposed equation including the product of 6MWT and body weight.

Rating:

Share or cite this content

Citations should be made in the following way:
V. Cavalheri, N. A. Hernandes, C. A. Camillo, V. S. Probst, D. Ramos, F. Pitta (Presidente Prudente, Londrina, Brazil). Estimation of maximal work rate based on the six-minute walking test and fat-free mass in patients with COPD. Eur Respir J 2010; 36: Suppl. 54, 4882

Member's Comments

No comment yet.

Related content which might interest you: Oxygen Saturation recovery after six-minute walk test and body composition in COPD and HF subjects. Source: International Congress 2019 – COPD: epidemiology and spirometry Year: 2019 The impact of body composition on walking distance in the six-minute walk test in COPD patients Source: Annual Congress 2008 - COPD - clinical and epidemiological aspects Year: 2008 Correlation between body mass index and walked distance during the six-minute walk test in obese patients Source: Eur Respir J 2007; 30: Suppl. 51, 654s Year: 2007 Predicting peak cycle work rate from the six-minute walk test in COPD Source: Annual Congress 2011 - Measuring physical activity and exercise performance in chronic lung disease: implications for rehabilitation Year: 2011 Correlation of oxygen uptake measured during 6-minute walk test and incremental cycle exercise test in COPD patients depends on severity of disease Source: Annual Congress 2009 - Novel insights in exercise physiology from cells to humans Year: 2009 Comparison between six minute walking test and corresponding constant work rate treadmill exercise in COPD patients Source: Eur Respir J 2002; 20: Suppl. 38, 286s Year: 2002 Evaluating impairment in exercise capacity in COPD patients with the six-minute walk distance test: a comparative study Source: Eur Respir J 2006; 28: Suppl. 50, 767s Year: 2006 Activities of daily living capacity is better predicted by 6MWD than by maximal exercise test in COPD patients Source: Eur Respir J 2003; 22: Suppl. 45, 329s Year: 2003 Reproducibility of 6-minute walking test in 1514 patients with COPD Source: Annual Congress 2010 - Outcomes in chronic lung disease: assessing the value of interventions – physical activity, strength and exercise Year: 2010 Respiratory effort cost index correlates negatively with pulmonary function test in COPD patients during six minute walking test Source: Annual Congress 2010 - Exercise training: new groups, new methods and outcomes Year: 2010 Applying reference equations for 6-minute walking test in COPD and ILD patients Source: Virtual Congress 2020 – Clinical and functional evaluation of COPD Year: 2020 The relation in body composition and exercise capacity assessed with incremental shuttle walking test in stable COPD Source: Annual Congress 2008 - Assessing profiles of rehabilitation candidates Year: 2008 Physiological responses to the 6-minute walk test and the incremental cycling differ in patients with COPD Source: Eur Respir J 2004; 24: Suppl. 48, 215s Year: 2004 Multivariables added to walked distance during 6-min walk test (6MWT) can predict the maximal oxigen consumption (Vo2max) in end-stage renal disease patients Source: Eur Respir J 2004; 24: Suppl. 48, 405s Year: 2004 Estimation of peak work load based on 6-min walk distance and general demographics in patients with COPD: A new regression equation Source: Annual Congress 2011 - Exercise tests and emerging outcomes: defining the impact of pulmonary rehabilitation Year: 2011 Validation of the current equations to estimate peak work load based on 6-min walk distance and general demographics in COPD patients entering pulmonary rehabilitation Source: Annual Congress 2011 - Skeletal muscle weakness in COPD: physical (in)activity and biological markers Year: 2011 The 6-minute walking distance parameters in COPD patients during biennium research Source: Eur Respir J 2006; 28: Suppl. 50, 807s Year: 2006 Brain oxygenation state during the 6-minute walking test in patients with COPD Source: International Congress 2017 – Neuromuscular consequences of respiratory diseases Year: 2017 Six-min walk distance test better reflects maximal exercise tolerance in severe, but not in mild COPD patients Source: Eur Respir J 2001; 18: Suppl. 33, 356s Year: 2001 6-minute walk work relationship with treadmill incremental cardiopulmonary exercise test in COPD Source: Annual Congress 2010 - Exercise in COPD Year: 2010