IJCS | Volume 32, Nº6, November / December 2019

564 1. World Health Organization (WHO). Ageing and health. [Accessed in 5 Feb 2018]. Available from: https://www.who.int/news-room/fact- sheets/detail/ageing-and-health. 2. Kok RM, Reynolds CF. Management of Depression in Older Adults: A Review. JAMA. 2017;317(20):2114-22. 3. Henriksen M, Hansen JB, Klokker L, Bliddal H, Christensen R. Comparable effects of exercise and analgesics for pain secondary to knee osteoarthritis: a meta-analysis of trials included in Cochrane systematic reviews. J Comp Eff Res. 2016;5(4):417-31. 4. Oh SH, KimDK, Lee SU, Jung SH, Lee SY. Association between exercise type and quality of life in a community-dwelling older people: A cross- sectional study. PLoS One 2017;12(12):e0188335. 5. Alabarse SL, Coelho Júnior HJ, Asano RY, Luna Filho B, Santos WC, Oliveira Filho JA. Moderate-Intensity Walking Training Improves Depressive Symptoms and Pain in Older Adults with Good Quality of Life: A Controlled Randomized Trial. Int J Cardiovasc Sci. 2019;32(6):553-562. 6. Tanaka H, Monahan KD, Seals DR. Age-predicted maximal heart rate revisited. J Am Coll Cardiol. 2001;37(1):153-6. 7. Ghorayeb N, Stein R, Daher DJ, Silveira AD, Ritt LE, Santos DF, et al. Sociedade Brasileira de Cardiologia. Atualização da Diretriz em Cardiologia do Esporte e do Exercício da Sociedade Brasileira de Cardiologia e da Sociedade Brasileira de Medicina do Esporte. Arq Bras Cardiol. 2019;112(3):326-68. References Franzoni & Stein Moderate exercise in the elderly Int J Cardiovasc Sci. 2019;32(6):563-564 Editorial heart rate, and 112 bpm would possibly be within a subaerobic zone; 2) since a CPET was available, the exercise training could have be planned based on the velocities and heart rates of respective VO 2 peak for both aerobic and anaerobic zones, or on the heart rates in the threshold and the interthreshold zone; 3) even if VO 2 peak was not a primary outcome, in this type of experiment, it is always important to discuss the prescription of exercise, since the TG showed an increase in VO 2 peak of 0.79 mL.kg -1 .min -1 (p = 0.06), i.e., a small, non-significant increment, which may have been a mere consequence of an error in the prescription of exercise load based on the percentage of HRmax. We believe that the percentage of the heart rate reserve could have been used for the monitoring of the exercise training load, which would have considered the resting heart rate. 7 Besides, an alternative method to control exercise level is the “old” and useful Borg scale of perceived exertion, which was not used by the authors; finally, 4) the authors reported a moderate positive correlation (r = 0.30) between depressive symptoms and physical pain. In fact, a correlation of 0.30 is considered weak or meaningless. However, despite the limitations mentioned above, the study has strengths that support its publication. One of the strengths is the authors’ proposal to investigate the effects of exercise in a high-prevalence population, in terms of QoL, depressive symptoms and physical pain. Elderly individuals experience limitations in their daily activities, and this fact is generally associated with a reduction in QoL and worsening of depressive symptoms and pain. The study showed that an intervention consisted of 12-week aerobic exercise training improved these outcomes, which, in our understanding, is worthy of credit. Also, the initiative to develop an investigative study aimed at better understanding the mechanisms involved in health promotion should be applauded. This is an open-access article distributed under the terms of the Creative Commons Attribution License