Classification of cardiorespiratory fitness using the six-minute walk test in adults: Comparison with cardiopulmonary exercise testing V.Z. Dourado, R.K. Nishiaka, M.S.M.P. Simões, V.T. Lauria, S.E. Tanni, I. Godoy, A.R.T. Gagliardi, M. Romiti, R.L. Arantes

Use of the Borg dyspnea scale to identify dynamic hyperinflation during the 6-minute walking test in individuals with moderate-severe COPD: A pilot study A.P.V.M. de Freitas, L.F. Belo, L. Martinez, N.A. Hernandes, F. Pitta

Dynamic hyperinflation, chronotropic intolerance and abnormal heart rate recovery in non-severe chronic obstructive pulmonary disease patients-reflections in the mirror R.V. Cherneva, V.M. Youroukova, Zh.Vl. Cherneva