Increase in oxygen uptake as a function of the increase in work rate may not differ between elderly and young subjects-reply - Wajngarten, M; Kalil, L M P; Negrão, C. E.; Ramires, P. R.; Rondon, E; Haebisch, H; Bellotti, Giovanni; Serro Azul, Luis Gastão C. C. de; Décourt, Luiz Venere; Barretto, A C P; Pileggi, F (Cardiology in the Elderly, 1995)