caa a22 4500 46793987X CHVBK 20180406153009.0 cr unu---uuuuu 170328e20060901xx s 000 0 eng 10.1007/s00421-006-0257-y doi (NATIONALLICENCE)springer-10.1007/s00421-006-0257-y Post-resistance exercise hypotension, hemodynamics, and heart rate variability: influence of exercise intensity [Elektronische Daten] [C. Rezk, R. Marrache, T. Tinucci, D. Mion Jr, C. Forjaz] The occurrence of post-exercise hypotension after resistance exercise is controversial, and its mechanisms are unknown. To evaluate the effect of different resistance exercise intensities on post-exercise blood pressure (BP), and hemodynamic and autonomic mechanisms, 17 normotensives underwent three experimental sessions: control (C—40min of rest), low- (E40%—40% of 1 repetition maximum, RM), and high-intensity (E80%—80% of 1 RM) resistance exercises. Before and after interventions, BP, heart rate (HR), and cardiac output (CO) were measured. Autonomic regulation was evaluated by normalized low- (LFR-Rnu) and high-frequency (HFR-Rnu) components of the R-R variability. In comparison with pre-exercise, systolic BP decreased similarly in the E40% and E80% (−6±1 and −8±1mmHg, P<0.05). Diastolic BP decreased in the E40%, increased in the C, and did not change in the E80%. CO decreased similarly in all the sessions (−0.4±0.2l/min, P<0.05), while systemic vascular resistance (SVR) increased in the C, did not change in the E40%, and increased in the E80%. Stroke volume decreased, while HR increased after both exercises, and these changes were greater in the E80% (−11±2 vs. −17±2 ml/beat, and +17±2 vs. +21±2bpm, P<0.05). LFR-Rnu increased, while lnHFR-Rnu decreased in both exercise sessions. In conclusion: Low- and high-intensity resistance exercises cause systolic post-exercise hypotension; however, only low-intensity exercise decreases diastolic BP. BP fall is due to CO decrease that is not compensated by SVR increase. BP fall is accompanied by HR increase due to an increase in sympathetic modulation to the heart. Springer-Verlag, 2006 Strength exercise nationallicence Blood pressure nationallicence Cardiac output nationallicence Stroke volume nationallicence Heart rate nationallicence Rezk C. Exercise Hemodynamic Laboratory, School of Physical Education and Sport, University of São Paulo, Av. Prof. Mello de Moraes, 65, Butantã, 05508-900, São Paulo, SP, Brazil aut Marrache R. Exercise Hemodynamic Laboratory, School of Physical Education and Sport, University of São Paulo, Av. Prof. Mello de Moraes, 65, Butantã, 05508-900, São Paulo, SP, Brazil aut Tinucci T. Exercise Hemodynamic Laboratory, School of Physical Education and Sport, University of São Paulo, Av. Prof. Mello de Moraes, 65, Butantã, 05508-900, São Paulo, SP, Brazil aut Mion Jr D. Hypertension Unit, General Hospital, University of São Paulo, São Paulo, SP, Brazil aut Forjaz C. Exercise Hemodynamic Laboratory, School of Physical Education and Sport, University of São Paulo, Av. Prof. Mello de Moraes, 65, Butantã, 05508-900, São Paulo, SP, Brazil aut European Journal of Applied Physiology Springer-Verlag 98/1(2006-09-01), 105-112 1439-6319 98:1<105 2006 98 421 https://doi.org/10.1007/s00421-006-0257-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00421-006-0257-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rezk C. Exercise Hemodynamic Laboratory, School of Physical Education and Sport, University of São Paulo, Av. Prof. Mello de Moraes, 65, Butantã, 05508-900, São Paulo, SP, Brazil aut NATIONALLICENCE 700 1- Marrache R. Exercise Hemodynamic Laboratory, School of Physical Education and Sport, University of São Paulo, Av. Prof. Mello de Moraes, 65, Butantã, 05508-900, São Paulo, SP, Brazil aut NATIONALLICENCE 700 1- Tinucci T. Exercise Hemodynamic Laboratory, School of Physical Education and Sport, University of São Paulo, Av. Prof. Mello de Moraes, 65, Butantã, 05508-900, São Paulo, SP, Brazil aut NATIONALLICENCE 700 1- Mion Jr D. Hypertension Unit, General Hospital, University of São Paulo, São Paulo, SP, Brazil aut NATIONALLICENCE 700 1- Forjaz C. Exercise Hemodynamic Laboratory, School of Physical Education and Sport, University of São Paulo, Av. Prof. Mello de Moraes, 65, Butantã, 05508-900, São Paulo, SP, Brazil aut NATIONALLICENCE 773 0- European Journal of Applied Physiology Springer-Verlag 98/1(2006-09-01), 105-112 1439-6319 98:1<105 2006 98 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer