IJCS | Volume 32, Nº4, July/August 2019

318 1. Belli KC, Silva PF, Franzoni LT, Myers J, Stein R, Ribeiro JP (In Memoriam). Speed and Grade Increment During Cardiopulmonary Treadmill Testing: Impact on Exercise Prescription. Int J Cardiovasc Sci. 2019;32(4):374-383. 2. Almeida AEM, Santander IRM, Campos MIM, Garcia JRA, Nascimento JA, Ritt LEF, et al. Classification system for cardiorespiratory fitness based on a sample of the Brazilian population. Int J Cardiovasc Sci. 2019;32(4):343-354. References Ricardo Stein Jorge Pinto Ribeiro: a true icon of exercise Int J Cardiovasc Sci. 2019;32(4):317-318 Brief Communication This is an open-access article distributed under the terms of the Creative Commons Attribution License Author contributions Conception and design of the research: Stein R. Acquisition of data: Stein R. Analysis and interpretation of the data: Stein R. Statistical analysis: Stein R. Obtaining financing: Stein R. Writing of the manuscript: Stein R. Critical revision of the manuscript for intellectual content: Stein R. Potential Conflict of Interest No potential conflict of interest relevant to this article was reported. Sources of Funding There were no external funding sources for this study. Study Association This study is not associated with any thesis or dissertation work. Ethics approval and consent to participate This article does not contain any studies with human participants or animals performed by any of the authors.