IJCS | Volume 32, Nº1, January/ February 2019

2 1. Hill L. Arterial pressure in man while sleeping, resting, working and bathing. J Physiol Lond. 1897;22:xxvi–xxix. 2. Cornelissen VA, Smart NA. Exercise training for blood pressure: a systematicreviewandmeta-analysis.JAmHeartAssoc.2013;2(1):e004473. 3. Chen CY, Bonham AC. Postexercise hypotension: central mechanisms. Exerc Sport Sci Rev. 2010;38(3):122-7. 4. Kenney MJ, Seals DR. Postexercise hypotension. Key features, mechanisms, and clinical significance. Hypertension. 1993;22(5):653-64. 5. Mach C, Foster C, Brice G, Mikat RP, Porcari JP. Effect of exercise duration on postexercise hypotension. J Cardiopulm Rehabil. 2005;25(6):366-9. 6. Pescatello LS, Guidry MA, Blanchard BE, Kerr A, Taylor AL, Johnson AN, et al. Exercise intensity alters postexercise hypotension. J Hypertens. 2004;22(10):1881-8. 7. Boeno F, Ramis T, Farinha J, Moritz C, Santos V, Oliveira A, et al. Hypotensive response to continuous aerobic and high-intensity interval exercise matched by volume in sedentary subjects. Int J Cardiovasc Sci. 2018;[ahead of print]. 8. Teixeira AL, Ritti-Dias R, Antonino D, Bottaro M, Millar PJ, Vianna LC. Sex differences in cardiac baroreflex sensitivity after isometric handgrip exercise. Med Sci Sports Exerc. 2018;50(4):770-7. 9. Laterza MC, de Matos LD, Trombetta IC, Braga AM, Roveda F, Alves MJ, et al. Exercise training restores baroreflex sensitivity in never-treated hypertensive patients. Hypertension. 2007;49(6):1298-306. 10. Forjaz CL, Tinucci T, Ortega KC, Santaella DF, Mion D, Jr., Negrao CE. Factors affecting post-exercise hypotension in normotensive and hypertensive humans. Blood Press Monit. 2000;5(5-6):255-62. References Teixeira &Vianna Post-exercise hypotension Int J Cardiovasc Sci. 2019;32(1)1-2 Editorial body and aortic arch relay information to the brainstem regarding beat-to-beat changes in blood pressure. 8 In healthy individuals, arterial baroreflex remains functional during exercise by resetting to operate around the prevailing pressure elicited by exercise. However, some evidence suggests that arterial baroreflex function is impaired in hypertensive subjects and normalized by exercise training. 9 In this sense, although the work of Boeno et al. 7 suggests that PEH was similar between CONT and HIIE matched by volume, these results was observed in young sedentary normotensive men, limiting its extrapolation to other populations. Indeed, although PEH occurs in normotensive and hypertensive individuals, its occurrence is more prominent in hypertensive individuals. 10 In conclusion, Boeno and colleagues should be commended for their approach equalizing exercise volume to examine PEH in response to CONT and HIIE. They demonstrated for the first time that exercise volume plays a critical role on the magnitude of PEH when comparing CONT and HIIE in young healthy subjects. We now await further studies examining the magnitude of PEH comparing CONT and HIIE matched by volume in older individuals and patients with hypertension to definitively answer that, if adjusted by equivalent volumes, both CONT and HIIE produce similar PEH. This is an open-access article distributed under the terms of the Creative Commons Attribution License