Post‐resistance exercise hemodynamic and autonomic responses: Comparison between normotensive and hypertensive men

Abstract

To compare post-resistance exercise hypotension (PREH) and its mechanisms in normotensive and hypertensive individuals, 14 normotensives and 12 hypertensives underwent two experimental sessions: control (rest) and exercise (seven exercises, three sets, 50% of one repetition maximum). Hemodynamic and autonomic clinic measurements were taken before (Pre) and at two moments post-interventions (Post 1: between 30 and 60 min; Post 2: after 7 h). Ambulatory blood pressure (BP) was monitored for 24 h. At Post 1, exercise decreased systolic BP similarly in normotensives and hypertensives (-8 ± 2 vs -13 ± 2 mmHg, P > 0.05), whereas diastolic BP decreased more in hypertensives (-4 ± 1 vs -9 ± 1 mmHg, P < 0.05). Cardiac output and systemic vascular resistance did not change in normotensives and hypertensives (0.0 ± 0.3 vs 0.0 ± 0.3 L/min; -1 ± 1 vs -2 ± 2 U, P > 0.05). After exercise, heart rate (+13 ± 3 vs +13 ± 2 bpm) and its variability (low- to high-frequency components ratio, 1.9 ± 0.4 vs +1.4 ± 0.3) increased whereas stroke volume (-14 ± 5 vs -11 ± 5 mL) decreased similarly in normotensives and hypertensives (all, P > 0.05). At Post 2, all variables returned to pre-intervention, and ambulatory data were similar between sessions. Thus, a session of resistance exercise promoted PREH in normotensives and hypertensives. Although this PREH was greater in hypertensives, it did not last during the ambulatory period, which limits its clinical relevance. In addition, the mechanisms of PREH were similar in hypertensives and normotensives.

Chronic resistance training does not affect post-exercise blood pressure in normotensive older women: a randomized controlled trial

“…The magnitude of these changes in BP are within the range of values that has been observed in younger and middle-aged normotensive healthy subjects (Queiroz et al 2009(Queiroz et al , 2013(Queiroz et al , 2014 and slightly lower (especially for DBP) than that observed in normotensive/pre-hypertensive overweight and obese middle-aged women (−7 mmHg for SBP and −6 mmHg for DBP) (Tibana et al 2013). It is not clear why a lower magnitude of post-exercise hypotension was observed when compared with Tibana and colleagues' investigation (Tibana et al 2013).…”

“…The reasons for the three dropouts were insufficient attendance to the training sessions (<85 % of the total sessions), a car accident, and lack of time to perform the evaluations. Considering a power of 90 %, an alpha error of 5 %, and a standard deviation of 3 mmHg for systolic BP, the minimal sample size necessary to detect a difference of 4 mmHg (Queiroz et al 2014) was 10 participants per group.…”

Uma Sessão De Exercício Resistido Dinâmico Não Induz Hipotensão Pós-Exercício Em Ratas SHR

“…Estudos apontam que durante uma sessão de exercício resistido ocorre o aumento da PAS tanto em normotensos como em hipertensos, mas em maior magnitude e importância para estes últimos 20 . Outros autores não relatam aumento significativo da PA entre as séries e após uma sessão de exercício resistido 21 e demonstram haver um efeito hipotensor 22 .…”

Neural mechanismsand post-exercise hypotension: The importance of experimental studies

“…In table 1 are presented post-exercise autonomic responses assessed by different methods. Overall, there were reductions of muscle sympathetic nerve activity after aerobic exercise 10,11,52 , reduction of cardiac autonomic balance 14,53 , and increase of baroreflex sensitivity and heart rate variability 54 . Contrarily, other studies reported increased cardiac and vasomotor sympathetic modulation, decreased parasympathetic modulation and/or attenuation of baroreflex sensitivity 12,13,15,55 however, those studies used resistance exercise 13,15,55 or maximal aerobic exercise 12 .…”

“…Raczak et al 54 18 healthy males (20 -24 years) (1) aerobic exercise session on a treadmill for 30 min at 65% -maximal HR.…”